Q1. PVC is obtained by the polymerisation of
(b) Vinyl chloride
Q2. Which amidst the following is not a gem stone ?
Q3. Which of the following vegetable oils does not contain essential fatty acids ?
(a) Sunflower oil
(b) Mustard oil
(c) Coconut oil
(d) Groundnut oil
Q4. The metallic constituents of hard water are ;
(a) Magnesium, calcium and tin
(b) Iron, tin and calcium
(c) Calcium, magnesium and iron
(d) Magnesium, tin and iron
Q5. The pH of human blood is between :
Q6. Which of the following imparts deep blue colour to glass ?
(a) Cobalt oxide
(b) Cupric oxide
(c) Ferrous oxide
(d) Nickel oxide
Q7. Which of the following fibres catches fire least ?
Q8. Which of the following is used as filler in tyre of rubber ?
(a) Carbon black
Q9. Which of the following alloy is used in making magnet ?
(b) Stainless steel
Q10. Milk tastes sour when it is left in open for some time. This happens due to the formation of
(a) Lactic acid
(b) Citric acid
(c) Acetic acid
(d) Carbonic acid