Question: Which of the following is a constituent of coffee ?

• 1. Caffeine
• 2. Nicotine
• 3. Calgon
• 4. Lignin

Question: Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces ________________?

• 1. Nylon-6
• 2. Dacron
• 3. Polyester
• 4. PVC

Question: Use of water having dissolved oxygen in boilers promotes___________________?

• 1. Corrosion
• 2. Sequestration
• 3. Scale formation
• 4. None of these

Question: Deaeration of water in its treatment is necessary, as it___________________?

• 1. Minimises its turbidity
• 2. Helps in controlling its taste and odour
• 3. Minimises its corrosiveness
• 4. None of these

Question: Permanent hardness of water is due to the presence of calcium & magnesium __________________?

• 1. Bi-carbonates
• 2. Sulphates & chlorides
• 3. Carbonate
• 4. None of these

Question: Glycerine can be obtained from ________________ ?

• 1. Fat
• 2. Naphthalene
• 3. Cumene
• 4. Sucrose

Question: Which of the following is not produced on commercial scale from sea water ?

• 1. Bromine
• 2. Magnesium compounds
• 3. Potassium compounds
• 4. Sodium sulphate

Question: Parathion and Malathion are _____________________?

• 1. Pesticides
• 2. Plasticisers for unsaturated polyesters
• 3. Pain-relieving drugs (analgesic)
• 4. Tranquilisers

Question: Raw materials required for the manufacture of __________________ is acetylene and hydrochloric acid?

• 1. Phthalic anhydride
• 2. Vinyl chloride
• 3. Maleic anhydride
• 4. Dacron

Question: Grignard reagent is chemically known as ____________________?

• 1. Ethyl magnesium chloride
• 2. Methyl magnesium chloride
• 3. Dichlorophenol
• 4. Monochloroacetic acid