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De-icing is the process of removing snow...

De-icing is the process of removing snow, ice or frost from a surface. In extremely cold regions, car windows get covered by ice reducing the visibility. The image below shows the de-icing of the window of a car during extreme cold using a fluid.

Which of the following compounds could be present in the de-icing fluid used above?

A

formaldehyde

B

phenol

C

propan-2-ol

D

acetic acid

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Ajay and Rakesh live in Rajgarh town of Churu districk of Rajasthan. As usual, the summer in this area of Rajasthan in extremely hot. Ajay's sister is getting engaged in the month of May, Ajay's family and relatives were waiting for the guests to arrive for the engagement ceremony. They had brought a slab of ice and put it in a tub of water for cooling the warm bottles of soft drinks. Just when they had finished drinking all the cold soft drink bottles, the gruests (including would-be bridegroom) arrive. Ajay and Rakesh were in a fix because they had only warm bottles of soft drinks left with them. Ajay suggested that they should put the warm soft drink bottles in the ice cold water which they already had in the tub but Rakesh did not agree with him Rakesh quickly brought a big slab of ice from the nearby shop crushed it well. He then put the warm soft drink bottles in an empty tub and surrounded them well with crushed ice. These warm soft drink bottles got colled in a short time and were served to the guests. All the guests enjoyed cold soft drinks on a very hot day and felt refreshed. (a) What is the temperature of water formed from freshly melted ice ? (b) What is the temperature of melting ice ? (c) A person holds some ice-old water in his left hand palm and a piece of ice in his right hand palm. Which of the two will appear to be more cold and why ? (d) Explain why, the warm drink bottles could be cooled more quickly by placing them in a tub of crushed ice than in a tub of ice cold water. (e) Can you suggest another way in which the warm soft drinks can be cooled even more quickly by using ice (than by keeping the bottles in crushed ice) ? (f) What type of change of state takes place when ice is used for cooling purposes ? What is the special name of this change of state ? (g) What values are displayed by Rakesh in the episode ?

It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. If the polar ice cap melts and the sea level rises

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  • It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. Which of the following will be the consequence(s) if there is a rapid decline in the ice cover of earth? (I) It will bring ecological disaster. (II) It will have negative effect on the economy. (Ill) It will affect the normal life mainly iµ the advanced nations. (IV) It will snatch the dreamland of our poets.

    A
    Only l and II
    B
    Only III and IV
    C
    Only lll
    D
    Only l

  • It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. What is the prime cause behind the 'shrinking of ice fields?

    A
    human activity taking place at these places
    B
    scientific experiment$ being done in these area
    C
    rising temperature due to pollution in atmosphere
    D
    drying up of rivers which are snow-fed

  • It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. What measure is imminent for saving our mountain glaciers and ice fields?

    A
    launching a worldwide campaign to save them
    B
    checking the emission of carbon dioxide into the atmosphere
    C
    Making people aware of our environment
    D
    depending less on the environment for livelihood

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    Explore conceptually related problems

    It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. Over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century means

    It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. Which of the following is false in the context of the passage?

    It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. Prediction of rainfall in the American Midwest depends on

    It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. What efforts need to be taken to stabilise the climate?

    It may be quite a while before climatologists are able to predict rainfall in the American Midwest by measuring snow-fall in the Himalayas. But there is one prediction which they can confidently make now, and that is that the earth's ice cover- from the polar ice caps to the Himalayas - is thawing at an alarming rate. So much so that over 50 per cent of the planet's mountain glacier mass could be history by the turn of the next century. According to the latest findings of the US-based environmental thinktank, Worldwat.ch institute, the Arctic Sea ice has shrunk by nearly 40 per cent in the last 25 years, even as Antarctica's extensive ice fields and glaciers have been badly 'bleeding' at their edges. This would indicate that the earth has entered a period of climatic change that is likely to cause widespread environmental, economic and social disruption over the next century if emissions of heat- trapping gases are not reduced. As a result of global warming, average planetwide temperatures have been going up steadily. If the levels of carbon dioxide- the bad boy of global warming - in the atmosphere are allowed to increase at the present rate, more heat will be trapped in the planetary cocoon, raising global temperatures to scorching highs. The polar ice caps will melt and the resultant rise in sea levels will be catastrof hic for low-lying island-states and countries with large coastal populations, such as Mar.shall Islands and Banglad~sh. Regional flooding will threaten water supplies and dramatically alter the habitats of many . flora and fauna. This is particularly bad news for such regions as northern India, home to half of the total Indian populace who depend wholly on the glacier-fed rivers for their drinking water and irrigation needs. With the Himalayan ice caps melting like ice-cream on a hot summer day, these snow-fed rivers will first swell and then run dry, triggering off devastating floods, followed by a desolating drought. People used to think there was time to soll out problems related to climate change, but no longer. The chilling prospect of an imminent global glacial melt calls fgr immediate damage control exercises to stabilise the climate. A good way to begin, perhaps, will be to overhaul the energy and transportation systems which drive the world's fossil fuel economy and, instead develop low- carbon energy systems based on electronic technologies. Give a suitable title to the passage

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