Q1. By which organic compound all the oils are known?
(a) Carbohydrate
(b) Protein
(c) Hydrocarbon
(d) Ester
Q2. The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon?
(a) 6
(b) 12
(c) 18
(d) Zero
Q3. Who developed atom bomb?
(a) Warner Wan Brown
(b) J. Robert Openheimer
(c) Edward Taylor
(d) Samuel Koehen
Q4. The major harmful gas emitted by automobile vehicle which causes air pollutions is
(a) Carbon Monoxide
(b) Methane
(c) Carbon dioxide
(d) Ozone gas
Q5. The acid used in lead storage cells is
(a) phosphoric acid
(b) hydrochloric acid
(c) nitric acid
(d) sulphuric acid
Q6. Milk tastes sour when kept in the open for sometime due to the formation of
(a) lactic acid
(b) citric acid
(c) acetic acid
(d) carbonic acid
Q7. What is the most commonly used substance in fluorescent tubes?
(a) Sodium oxide and argon
(b) Sodium vapour and neon
(c) Mercury vapour and argon
(d) Mercury oxide and neon
Q8. What is “milk of magnesia” chemically
(a) Magnesium carbonate
(b) Sodium bicarbonate
(c) Calcium hydroxide
(d) Magnesium hydroxide
Q9. Soap is prepared by boiling caustic soda with
(a) Alcohol
(b) Kerosene oil
(c) Glycerine
(d) Fats
Q10. Bronze is an alloy of
(a) Copper and Zinc
(b) Tin and Zinc
(c) Copper and Tin
(d) Iron and Zinc
Solutions
S1. Ans.(c)
S2. Ans.(a)
S3. Ans.(b)
S4. Ans.(c)
S5. Ans.(d)
S6. Ans.(a)
S7. Ans.(c)
S8. Ans.(d)
S9. Ans.(d)
S10. Ans.(c)
