(a) Hydrogen sulphide
(b) Nitrogen dioxide
(c) Methyl chloride
(d) methyl isocyanate
Q2. The liquid waste from kitchens and baths, of residences is known as:
(a) Domestic sewage
(b) Storm water
(c) Sullage
(d) Refuse
Q3. The chemical used in developing photographic films is
(a) silver bromide
(b) hypo
(c) sodium sulphate
(d) hydroquinone
Q4. Which of the following is biodegradable?
(a) Paper
(b) D.D.T
(c) Aluminium
(d) Plastic
Q5. Chloroform can be used as
(a) Analgesic
(b) Anaesthetic
(c) Antimalarial
(d) Antibiotic
Q6. Philosopher’s Wool is
(a) Zinc carbonate
(b) Zinc sulphate
(c) Zinc oxide
(d) Zinc blende
Q7. The main source of carbon monoxide is
(a) Industrial process
(b) Fuel combustion
(d) Solid waste disposal
Q8. The chief source of naphthalene is
(a) Coal-tar
(b) Diesel
(c) Charcoal
(d) Camphor
Q9. Which of the following is used as a moderator in nuclear reactors?
(a) Thorium
(b) Graphite
(c) Ordinary water
(d) Radium
Q10. Bakelite is a copolymer of Phenol and
(a) Formaldehyde
(b) Acetaldehyde
(c) Benzaldehyde
(d) Cinnaldehyde
Q11. The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called:
(a) Zinc plating
(b) Alloy formation
(c) Vulcanization
(d) Galvanization
Q12. The element used for making solar cells is
(a) Magnesium
(b) Sodium
(c) Calcium
(d) Silicon
Q13. Wood spirit is
(a) Methyl alcohol
(b) Ethyl alcohol
(c) Butyl alcohol
(d) Propyl alcohol
Q14. The most important ore of lead is
(a) Galena
(b) Magnetite
(c) Pyrolusite
(d) Siderite
Q15. The most reactive among the halogens is
(a) Fluorine
(b) Chlorine
(c) Bromine
(d) Iodine
