Chemistry PYQ — Page 3

Match List I (Industrial processes) with List II (Industry with which associated) and select the correct answer using the codes given below the Lists: List I | List II I. Cracking | A) Rubber II. Smelting | B) Petroleum III. Hydrogenation | C) Copper IV. Vulcanization | D) Edible fats Codes:

Soft drinks such as colas contain significant quantities of

Aluminium surfaces are often ‘anodized’. This means the deposition of a layer of

Consider the following statements: Hard water is not suitable for 1. drinking. 2. washing clothes with soap. 3. use in boilers. 4. irrigating crops. Which of these statements are correct?

Match List I with List II and select the correct answer using the codes given below the Lists: List I | List II I. German Silver | A) Tin II. Solder | B) Nickel III. Bleaching Powder | C) Sodium IV. Hypo | D) Chlorine

Most of the explosions in mines occur due to the mixing of

A small pouch containing silica gel is often found in bottles of medicine in tablet or powder form because silica gel

Consider the following statements regarding a motor car battery: 1. The voltage is usually 12 V. 2. Electrolyte used is hydrochloric acid. 3. Electrodes are lead and copper. 4. Capacity is expressed in ampere-hour. Which of the above statements are correct?

When ants bite, they inject

Match List-I (Naturally occurring substances) with List-II (Elements) and select the correct answer using the codes given the lists: | List-I | | List-II A | Diamond | 1. | Calcium B. | Marble | 2. | Silicon C. | Sand | 3. | Aluminium D. | Ruby | 4. | Carbon Codes: ABCD

Match List-I (Drugs/Chemicals) with List -II (Their uses) and select the correct answer using the codes given below | List-I | | List-II A. | Atropine | 1. | Local anaesthesia B. | Ether | 2. | Heart trouble C. | Nitro-glycerine | 3. | Dilation of pupil. D. | Pyrethrin | 4. | Mosquito control Codes: ABCD

Assertion (a): Formic acid is a stronger acid than acetic acid. Reason (R): Formic acid is an organic acid.

Consider the following statements: Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to 1. act as the reducing agent. 2. remove silica associated with the iron ore. 3. function as fuel; to supply heat. 4. act as an oxidizing agent. of these statements

Assertion (a): Sodium metal is stored under kerosene. Reason (R) Metallic sodium melts when exposed to air.

Assertion (a): Phenyl is used as a household germicide. Reason (R): Phenyl is phenol derivative and phenol is an effective germicide.

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.

Which one of the following metals does not form amalgam?

Which one of the following, statements regarding starch and cellulose is not correct?

Match List-I with List-il and select the correct answer using the codes given below the lists: | List-I | | List-II A. | Potassium bromide | 1. | Fertiliser B. | Potassium nitrate | 2. | Photography C. | Potassium sulphate | 3. | Bakery D. | Monopotassium tartarate | 4. | Gun powder Codes: ABCD

Match List I with List II and select the correct answer using the codes given below the lists: | List- I | | List-II A. | Blue vitriol | 1. | Sodium bicarbonate B. | Epsom salt | 2. | Sodium hydroxide C. | Baking soda | 3. | Magnesium sulphate D. | Caustic soda | 4. | Copper sulphate Codes: ABCD

The most reactive among the halogens is

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

The tendency of a liquid drop to contract and occupy minimum area is due to:

Which one of the following has the highest fuel value?