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Read the given passage and fill in the b...

Read the given passage and fill in the blanks by selecting an appropriate option. Iron nails when new are grey and bright, When exposed to __(i). they get covered with a ____(ii) coating. This process is called ___(iii) and it is a ___(iv) change.

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Read the given passage and fill in the blanks by selecting an appropriate option. Bleaching powder is a ul(" (i) ") powder. When exposed to air, it reacts with ul(" (ii) ") of the air to liberate Cl_(2) gas. It is ul(" (iii) ") in cold water and milkiness of the solution is due to presence of unreacted ul(" (iv) ") . It reacts with HCl and H_(2)SO_(4) liberating ul(" (v) ") gas.

Read the given passage carefully and fill in the blanks by selecting an appropriate option. Oxides of ul(" (i) ") are reduced to their respective metals by heating with coke and the process is called ul(" (ii) ") . Before carrying out reduction with carbon, if the calcined or roasted ore still contains infusible impurities of earthy matter, called ul(" (iii) ") , an additional substance, called ul(" (iv) ") is added which combines with (iii) to form a fusible material, called ul(" (v) ") .

Read the given passage and fill in the blanks by selecting an appropriate option . The head of the matchstick contains __i_ and (ii)___while the rubbing surface contains (iii)_____ and (iv)____. When matchstick is rubbed on the surface, some of the (v)_______gets converted into (vi)______ due to the heat generated by friction.

Read the given passage and fill in the blanks by selecting an appropriate option. Change in temperature and pressure plays a very important role in changing the state of matter. A gas gets liquefied with (1) and (11) while camphor undergoes sublimation with (iii) and (iv).

Read the given passage and fill in the blanks by selecting an appropriate option. When a mixture of two (i)_____ liquids having a difference of less than 25^@C in their boiling points is to be separated, a (ii)_____ is used which increases the (iii)____ surface area. As a result, when the vapours of both the liquids rise, the (iv)____ volatile liquid will condense while the vapours of (v)___ volatile liquid will rise.

Read the given passage and fill in the blanks by choosing an appropriate option. Metals have high densities except (i)__ which can even float on water. Metals are malleable and ductile (ii)___ are the most malleable and ductile metals. All metals conduct heat and electricity. (iii)___ is the best conductor while (iv)___ is a poor conductor.

SCIENCE OLYMPIAD FOUNDATION -CHANGES AROUND US-MULTIPLE CHOICE QUESTION
  1. Which of the following features are related to evaporation of water? ...

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  2. Sudha took lemon juice in two flasks. She put salt in flask 1 and wash...

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  3. Study the given Venn diagram carefully The centre point X rep...

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  4. A metallic piece (X) is dropped into copper sulphate solution. After s...

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  5. Read the given passage and fill in the blanks by selecting an appropri...

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  6. Mark the incorrect statement

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  7. Few changes are given below. Mark the correct option from the given co...

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  8. Nitu mixed some iron filings with sulphur powder in a China dish. She ...

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  9. What is common among the following phenomena? 1. Change of season...

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  10. Observe the two figures given below. In figure la solution of sugar in...

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  11. Identify the reversible and irreversible changes among the following: ...

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  12. Study the given flow chart carefully,

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  13. A potter shapes pots out of clay (Process 1). He then bakes the pots i...

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  14. Match column with column Il and select the correct option from the giv...

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  15. Consider the following phenomena : (i) Forest fire (ii) Growth of ...

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  16. Observe the given figure carefully and select the correct statement.

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  17. Swati classified a few changes occurring around us as shown in the tab...

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  18. Read the given statements and mark the correct option Statement 1: ...

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  19. Study the given Venn diagram and identify points 1, 2 and 3.

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  20. Study the given Venn diagram. If 1 represents slaking of lime...

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