Q1. Which one of the following is another name of RDX?
(a) Cyanohydrin
(b) Dextran
(c) Cyclohexane
(d) Cyclonite
(a) Argon
(b) Neon
(c) Xenon
(d) Nitrous oxide
Q3. Salts of which of the following elements provide colours to fireworks?
(a) Zinc and sulphur
(b) Potassium and mercury
(c) Strontium and barium
(d) Chromium and nickel
Q4. An aqueous solution of copper sulphate is acidic in nature because the salt undergoes
(a) Dialysis
(b) Electrolysis
(c) Hydrolysis
(d) Photolysis
Q5. Most of the explosions in mines occur due to the mixing of-
(a) Hydrogen with oxygen
(b) Oxygen with acetylene
(c) Methane with air
(d) Carbon dioxide with ethane
Q6. The chemical name of laughing gas is-
(a) Nitrous oxide
(b) Nitric oxide
(c) Nitrogen dioxide
(d) Nitrogen peroxide
Q7. The alum used for purifying water is-
(a) Potash alum
(b) Ammonium alum
(c) Chrome alum
(d) Ferric alum
Q8. Silk is a-
(a) Carbohydrate
(b) Fat
(c) Hydrocarbon
(d) Protein
Q9. Milk is an example of-
(a) Sol
(b) Gel
(c) Emulsion
(d) Suspension
Q10. In polluted water, the dissolved oxygen in it-
(a) Increases
(b) Becomes zero
(c) Decreases
(d) Bubbles out
Q11. Amino acids are the building blocks of-
(a) Vitamins
(b) Starch
(c) Proteins
(d) Lipids
Q12. Diamond is an allotrope of-
(a) Tin
(b) Silicon
(c) Sulphur
(d) Carbon
Solutions
1.D
2.C
3.C
4.C
5.C
6.A
7.A
8.D
9.C
10.C
11.C
12.D