1) Which one of the following is produced during the formation of photochemical smog?

2) The water pollution in river is measured by the dissolved amount of

3) Physico-chemical characteristics of water in water sources undergo changes due to

4) Which one of the following fuels causes minimum environmental pollution ?

5) The final Agent Orange raid in Vietnam took place in 1970– areas have begun to bloom again. But 19 years after the war’s end, it seems plain that Agent Orange is killing and maiming human beings, something it never intended to do. The apparent toxic fallout from those clouds–is a crop of human miseries including cancers, miscarriages and birth defects-that may persist for decades."  The offensive substance referred to in this quotation is:

6) With reference to the usefulness of the by-products of sugar industry , which of the following statements is/ are correct?

1. Bagasse can be used as biomass fuel for the generation of energy.

2. Molasses can be used as one of the feedstocks for the production of synthetic chemical fertilizers.

3. Molasses can be used for the production of ethanol.

Select the correct answer using the codes given below.

7) Consider the following statements : Chlorofluorocarbons, known as ozone-depleting substances, are used

1. In the production of plastic foams

2. In the production of tubeless tyres

3. In cleaning certain electronic components

4. As pressurizing agents in aerosol cans

Which of the statements given above is/are correct?

8) Which one of the following is used as an explosive?

9) Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

10) What is Bisphenol A (BPA)?

11) Which one of the following is another name of RDX?

12) Consider the following chemicals:

1. Benzene

2. Carbon tetrachloride

3. Sodium carbonate

4. Trichloroethylene

Which of the above/is are used as dry cleaning chemical?

13) Assertion (A) : The main constituent of the liquefied petroleum gas is methane.

Reason (R) : Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.

14) Consider the following statements:

1. Liquefied natural gas (LNG) is liquefied under extremely cold temperatures and high pressure to facilitate storage or transportation in specially designed vessels.

2. First LNG terminal in India was built in Hassan.

3. Natural gas liquids (NGL) are separated from LPG and these include ethane, propane, butane and natural gasoline.

Which of the statements given above is/are correct?

15) The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is

1. to keep the washing powder dry

2. to maintain the alkalinity of the powder

Which of these statements is/are correct?

16) Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons?

17) Assertion (A) : Formic acid is a stronger acid than acetic acid.

Reason (R) : Formic acid is an organic acid.

18) Consider the following statements about acetylene:

1. It is used in welding industry

2. It is a raw material for preparing plastics

3. It is easily obtained by mixing silicon carbide and water of these statements

19) Assertion (A) : Phenyl is used as a household germicide.

Reason (R) : Phenyl is phenol derivative and phenol is an effective germicide.

20) Which one of the following is used as an anti-freeze for the automobile engines?

21) Which one of the following has the highest fuel value?

22) Which one of the following was used as a chemical weapon in the first world war ?

23) Which one of the following is an active component of oil of clove?

24) The characteristic odour of garlic is due to

25) The offending substance in the liquor tragedies leading to blindness etc. is