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Chemistry

Chemistry
The heat value of combustion of Gasoline is

39400 kJ/kg
14600 kJ/kg
12600 kJ/kg
47000 kJ/kg

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Chemistry
What is the chemical symbol of mercury

Mg
Hg
None of these
Mr

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Chemistry
What is the element required for solar energy conversion ?

Silicon
Tantalum
Beryllium
Ultra pure carbon

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Chemistry
Which acid is used in Lead storage battery?

Hydrochloric acid
Acetic acid
Nitric acid
Sulphuric acid

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Chemistry
Which one of the following gases has the highest calorific value?

Coal gas
Natural gas
Water gas
Indane gas

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Chemistry
The presence of ozone in the stratosphere is responsible for

Higher rate of photosynthesis
Checking the penetration of ultra-violet rays to the earth
Increasing the average global temperature in recent years
Supplying oxygen for people travelling in jets

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