2096: Match List I (Oxdiation number) with List II (The element) and select the correct answer using the codes given below this lists:
List I List II
(Oxidation number) (The element)
A. 2 1. Oxidation number of Mn in MnO2
B. 3 2. Oxidation number of S in H2S2O7
C. 4 3. Oxidation number of Ca in CaO2
D. 6 4. Oxidation number of Al in NaAIH4
Codes:
A B C D
(a) 3 4 1 2
(b) 4 3 1 2
(c) 3 4 2 1
(d) 4 3 2 1
2097: Two taps can fill a tank separately in 20 minutes and 30 minutes respectively. If both the taps are opened simultaneously, then the tank can be filled in:
(a) 50 minutes
(b) 15 minutes
(c) 12 minutes
(d) 10 minutes
2098: A rapid increase in the rate of inflation is sometimes attributed to the "base effect", What is "base effect" ?
(a) It is the impact of the price levels of previous year on the calculation of inflation rate
(b) It is the impact of drastic deficiency in supply due to failure of crops
(c) It is the impact of the surge in demand due to rapid economic growth
(d) None of the statements (a), (b) and (c) given above is correct in this context
2099: Consider the following statements:
1. Great Britain comprises England, Wales, Scotland and Northern Ireland.
2. England covers less than 60% of the total area of the United Kingdom.
Which of the following statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
2100: Which one of the following metals does not form amalgams ?
(a) Zinc
(b) Copper
(c) Magnesium
(d) Iron