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Chemistry

Chemistry
The element used for making solar cells is

Silicon
Magnesium
Sodium
Calcium

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Chemistry
Ultraviolet radiation striking the earth is due to the depletion of

Oxygen
Carbon monoxide
Carbon dioxide
Ozone

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Chemistry
Which one of the following species has the highest bond order, shortest bond length and maximum bond strength

O-2
O2
O+2
O-22

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Chemistry
Which one of the following statement is correct ?Ozone is found in the earth's atmosphere mostly between

5 and 10 km
10 and 20 km
20 and 50 km
50 and 100 km

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Chemistry
The maximum number of covalent formed by nitrogen is

3
1
4
2

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Chemistry
The rusting of iron is a/an

Electrical change
Electrochemical change
Physical change
None of these

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MORE MCQ ON Chemistry

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