172.The glass used to make
irmometers:
(a) Safety glass (b) Pyrex glass
(c) Flint glass (d) Water glass
Answer: (b)
173. Impure
camphor is purified by:
(a) Sublimation (b) Fractional crystallization
(c) Fractional
distillation (d) Steam distillation
Answer: (a)
174.Diesel oil is preferred for heavy motor vehicles because:
(a) It is cheap
(b) It causes less damage to engine
(c) of its higher efficiency
and fuel economy
(d) of its higher production from crude
Answer: (c)
175. The compound of Copper
which is a constituent of Bordeaux Mixture? /
(a) Copper Sulphate (b) Copper Nitrate
(c) Copper Phosphate (d) Copper Oxide
Answer: (a)
176. The red colour of Mars is due to:
(a) Iodine (b) Ferric oxide
(c) Potassium
permanganate (d) Methyl red
Answer: (b)
177. The
bubbles in Champagne are:
(a) Carbon dioxide (b) Hydrogen
(c) Oxygen (d) Nitrogen
Answer: (a)
178. The metal
that shows acidic and basic character:
(a) Iron (b)
Aluminium (c) Gold (d) Silver
Answer: (b)
179.Chemical
property of a metal is determined by:
(a) Electrons (b) Protons
(c) Neutrons (d) AIl of these
Answer: (a)
180. 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)
181.Natural
rubber is a polymer of:
(a) Ethylene (b) Venyl Chloride
(c) Isoprene (d) Styrene
Answer: (c)
182.Element
essential for the functioning of Thyroid gland:
(a) Vanadium (b) Chlorine
(c) Iodine (d) Magnesium
Answer: (c)
183.The
setting of plaster of is involves which among the following process?
(a) Hydrolysis (b) Hydration
(c) Reduction
(d) None of these
Answer: (b)
184.Which of the following is a' common constituent of Transistor?
(a) Beryllium (b) Iron (c) Copper (d) Germanium
Answer: (d)
185. The whitest substance:
(a) Topaz (b) Diamond (c) Marble (d) Titanium
dioxide
Answer: (d)
186. Which element has the second highest
capacity for oxidation?
(a) Iron (b) Nitrogen (c) Mercury (d)
Oxygen
Answer: (d)
187. Substance used for
making artificial heart valve:
(a)PVC (b) Nylon (c)Terrilyn (d) Teflon
Answer: (d)
188. The
hydrocarbon used for dry cleaning:
(a)
Benzene (b) Toluene (c) Methane (d) Ethane
Answer: (a)
189.The
nitrogen compound -used as both fertilizer and explosive:
(a) Ammonium Chloride
(b) Ammonium
nitrate
(c) Urea (d) Ammonium Carbonate
Answer: (b)
190. Lead Chromate imparts ------ colour to rubber products:
(a) Yellow (b) White (c) Green (d) Red
Answer: (a)
191. Which is
a silicate mineral aluminium and fluorine?
(a)
Diamond (b)
Emerald (c)
Topaz (d) Marble
Answer: (c)
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