Ans: (a)
201. An element is best characterized by its: [CDS 1999]
(a) electronic configuration
(b) atomic number
(c) atomic weight
(d) atomic volume
Ans: (b)
202. The anti-knocking compound used in petrol engines is :
(a) diethyl Lead
(b) tetra-ethyl Lead
(c) triethyl Lead
(d) mono ethyl Lead
Ans: (b)
203. Rusting of iron is an example of:
(a) rapid oxidation
(b) spontaneous combustion
(c) slow oxidation
(d) reduction
Ans: (c)
204. Oxidation involves:
(a) gain in electrons
(b) gain of hydrogen
(c) loss of electrons
(d) combustion
Ans: (c)
205. In colourful diamond different colours are present due to :
(a) impurities
(b) angular bonds between the carbon atoms
(c) different patterns of carbon chains
(d) None of the above
Ans: (a)
206. Match the following: [IAS 2003]
A. Vodka 1. Apples
B. Brandy 2. Potatoes
C. Cidar 3. Barley
D. Whisky 4. Grapes
A B C D
(a) 2 4 1 3
(b) 4 3 3 1
(c) 2 1 3 4
(d) 1 4 2 3
392