Zinc is a transition element and has many useful applications. The presence of zinc in trace amounts is essential in humans and many animals. Answer the following question : Is `ZnSO_4`(aq) coloured or colourless?

Zinc is a transition element and has many useful applications. The presence of zinc in trace amounts is essential in humans and many animals. Answer the following question : A compound of zinc is used as a rodent poison. Name the compound.

Zinc is a transition element and has many useful applications. The presence of zinc in trace amounts is essential in humans and many animals. Answer the following question : Name the compound of zinc used in paints.

Zinc is a transition element and has many useful applications. The presence of zinc in trace amounts is essential in humans and many animals. Answer the following question : What is the role of zinc in the body of humans and animals?

Trichloromethane or chloroform is a colourless oily liquid with a peculiar smell. It is sparingly soluble in water. The vapour when enhaled cause unconsciousness and therefore, it is used as an anaesthetic. Answer the following question : Why is the use of chloroform as an anaesthetic has been reduced?

Colloidal solutions are heterogeneous solutions which contain particles of intermediate size between those of true solutions and suspensions. These particles do not settle under gravity but settle on centrifugation. These particles are found to have charge. We notice many applications of these in our day to day life. Answer the following question : Name a colloidal solution of silver used as eye lotion.

Colloidal solutions are heterogeneous solutions which contain particles of intermediate size between those of true solutions and suspensions. These particles do not settle under gravity but settle on centrifugation. These particles are found to have charge. We notice many applications of these in our day to day life. Answer the following question : Colloidal medicines are used for intramuscular injections. Why?

Use the bar graph to answer the following questions. How many students have dog as a pet?

Diamond and Graphite are two allotropic forms of carbon. Both are covalent solids. These two froms have different structures and hence differ in physical properties. Both have their own importance in being used in everyday life. Diamond is popularly used in jewellery and graphite is extensively used as electrodes in many industrial processes. Answer the following questions Which of the allotropes is a good conductor of electricity.

Synthetic polymers are finding applications in almost all spheres of life and are making our life comfortable. Their large scale use has been based on their relative inertness to environment Process giving them durability for long time. However, their long durability is not altogether an advantage. These solid wastes remain undegraded for quite a long time and their disposal has created a serious problem of waste management. If the overuse of plastics continues, it will pose a serious threat to all of us. After reading the above passage, answer the following question : Is it advisable to continue with overuse of plastics due to their immense use in our daily life?

Following pictograph shows the numbr of tractors in five villages: Observe the pictograph and answer the following question: How many more tractors village C has as compared to village B?