IAS 1998 — Chemistry

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

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