White lung cancer is caused by :

• asbestos

• silica

• paper

• textiles

Green chemistry means such reactions which

• are related to the depletion of ozone layer

• study the reactions in plants

• produce colour during reactions

• reduce the use and production of hazardous chemicals.

The radiant energy from the sun is due to :

• combustion

• chemical reaction

• nuclear fusion

• nuclear fission

Which of the following chemicals are used to manufacture methyl isocyanate that caused "Bhopal Tragedy"?

(i) methylamine 

(ii) phosgene

(iii) phosphine

(iv) dimethylamine

• (i) and (iii)

• (iii) and (iv)

• (i) and (ii)

• (ii) and (iv)

Ozone in stratosphere is depleted by

• CF₂Cl₂

• C₇F₁₆

• C₆H₆Cl₆

• C₆F₆

Which of the following is not a green house gas?

• Carbon dioxide

• Water vapour

• Methane

• Oxygen

Assertion : Photochemical smog is produced by nitrogen oxides.

Reason : Vehicular pollution is a major source of nitrogen oxides.

• If both assertion and reason are true and the reason is the correct explanation of the assertion.

• If both assertion and reason are true and the reason is not the correct explanation of the assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Among the following, the one which is not a "green house gas", is

• N₂O

• CO₂

• CH₄

• O₂

The ozone layer forms naturally by :

• the interaction of CFC with oxygen

• the interaction of UV radiation with oxygen

• the interaction of IR radiation with oxygen

• the interaction of oxygen and water vapour

Among the following, the one that is not a green house gas is:

• Methane

• Ozone

• Sulphur dioxide

• Nitrous oxide