Q1. The most abundant metal in the earth’s crust is
(a) Zinc
(b) Copper
c) Aluminium
d) Iron
Q2. Production of Chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
(a) Television
(b) Tube light
(c) Cooking gas
(d) Refrigerator
Q3. The gas used to extinguish fire, is
(a) Neon
(b) Nitrogen
(c) Carbon dioxide
(d) Carbon monoxide
Q4. In which of the following activities silicon carbide is used?
(a) Making cement and glass
(b) Disinfecting water of ponds
(c) Making casts for statues
(d) Cutting very hard substances
Q5. The element common to all acids is
(a) Carbon
(b) Hydrogen
(c) Oxygen
(d) Sulphur
Q6. Gobar gas contains mainly
(a) Methane
(b) Carbon Dioxide
(c) Butane
(d) Carbon monoxide
Q7. A non-metallic oxide which is neutral in nature is-
(a) CO2
(b) CO
(c) P2O5
(d) none of these
Q8. An iron nail is dipped in copper sulphate solution. It is observed that—
(a) The colour 0f the solution remain unchanged.
(b) The colour 0f the solution becomes red .
(c) The colour 0f the solution turns to light green .
(d) None of these
Q9. What is the effect of SO2 on litmus paper?
(a) turns dry blue litmus paper red
(b) turns moist blue litmus paper red
(C) turns moist red litmus paper blue
(d) none of these
Q10. Metal A when dipped in solution of salt of metal B, then metal B is displaced. this shows that—
(a) Metal A is more reactive than metal B
(b) Metal B is more reactive than metal A
(C) Metal A and metal B are equally reactive
(d) None of above
Answers
S1. Ans. (c)
S2. Ans. (d)
S3. Ans. (c)
S4. Ans. (d)
S5. Ans. (b)
S6. Ans.(a)
S7. Ans. (a)
S8. Ans. (c)
S9. Ans. (b)
S10. Ans (a)
