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Chemistry

Chemistry
In a Carbonyl group a carbon atom makes double bond with

Carbon
Oxygen
Hydrogen
None of these

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Chemistry
Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ?

Hydrogen
Neon
Sodium
Nitrogen

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Chemistry
Which one of the following contributes largely to the ‘green house effect’ ?

Ozone
Water vapour
Carbon dioxide
Carbon monoxide

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Chemistry
In arc welding, Argon is used because of its

High flammability
Ability to lower the melting point of the metal
Low reactivity with metal
High calorific value

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Chemistry
The manufacturing of iron from iron ore involves the process of

Reduction
Fractional distillation
Electrolysis
Oxidation

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Chemistry
Which of the following alkali metals has highest specific heat?

Caesium
Rubidium
Potassium
Lithium

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