336. Amyl acetate has the smell of:
(a) Grapes (b) Orange
(c) Pineapple (d) Banana
Answer: (d)
337. Which one of the following is not applicable to metals?
(a) High Melting point (b) High Boiling point
(c) High density (d) Low melting point
Answer: (d)
338. Volume of liquid is measured in:
(a) Litre (b) Gram
(c) Metre (d) Yard
Answer: (a)
339. The material used for the bomb dropped in Nagasaki:
(a) Plutonium (b) Thorium
(c) Uranium (d) None of these
Answer: (a)
340. Which human organ is first affected by nuclear radiation?
(a) Brain (b) Liver
(c) Heart (d) Kidney
Answer: (a)
341. Which metal contributes the largest portion of the mass of
the earth?
(a) Aluminium (b) Magnesium
(c) Iron (d) Nickel
Answer: (c)
342. Which element has the smallest atom?
(a) Hydrogen (b) Helium
(c) Lithium (d) Boron
Answer: (a)
343. The mineral added to cement to adjust the duration of setting:
(a) Epsom (b) Sodium
(c) Lime (d) Gypsom
Answer: (d)
344. Which one of the following is not in crystalline form?
(a) Table salt (b) Blue vitriol
(c) Rubber (d) Sugar
Answer: (c)
345. The most abundant mineral in sea water:
(a) Sodium (b) Magnesium
(c) Calcium (d) Chlorine
Answer: (d)
346. Which metal is used to make the covering of nuclear reactors?
(a) Lead (b) Uranium
(c) Tin (d) Copper
Answer: (a)
347. Which is added to petrol to reduce knocking:
(a) Ethyl Mercapton (b) Tetra Ethyl Lead
(c) Gas Oil (d) Benzene
Answer: (b)
348. The first organic compound prepared in laboratory:
(a) Ammonia (b) Urea
(c) Methane (d) Benzene
Answer: (b)
349.Which is known as ‘Artificial Silk’?
(a) Dioxine (b) Nylon
(c) Cellulose (d) Rayon
Answer: (d)
350. Which one of the following is an isotope of Hydrogen?
(a) Protium (b) Deuterium
(c) Tritium (d) All of these
Answer: (d)
351. The isotope used for the treatment of Cancer:
(a) Carbon-14 (b) Uranium-238
(c) Cobalt-60 (d) None of these
Answer: (c)
352. Chemical property of a metal is determined by:
(a) Electrons (b) Protons
(c) Neutrons (d) All of these
Answer: (a)
353. The main constituent of Cellulose:
(a) Nitrogen (b) Hydrogen
(c) Carbon (d) Oxygen
Answer: (c)
354. Which gas is commercially produced through Bosch Process?
(a) Oxygen (b) Nitrogen
(c) Helium (d) Hydrogen
Answer: (d)
355. Which is added to petrol in cold countries to avoid freezing?
(a) Ethylene Glycol (b) Tetra Ethyl Lead
(c) Ethyl Mercapton (d) Benzene
Answer: (a)
356. Sodium Citrate is used as a ........:
(a) Fuel (b) Explosive
(c) Food preservative (d) Pigment
Answer: (c)
357. Plant ash contains:
(a) Calcium (b) Potassium
(c) Silver (d) Tin
Answer: (b)
358. Atomic number of nitrogen:
(a) 7 (b) 8
(c) 9 (d) 19
Answer: (a)
359. The path of electron around the nucleus:
(a) Ring (b) Orbit
(c) Sphere (d) None of these
Answer: (b)
360. Which element has the largest atom?
(a) Carbon (b) Nitrogen
(c) Sodium (d) Caesium
Answer: (d)
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