Chemistry Exam - Question

Q106. Haloarenes are more stable than haloalkanes due to
(a) Resonance effect
(b) Inductive effect
(c) Hyper conjugative effect
(d) All of them

Q107. The reaction intermediate formed during the preparation of diethylether from ethanol by tratment with H2SO4 is
(a) Carbanion
(b) Carbocation
(c) Carbene
(d) Free radical

Q108. Of the following compounds of calcium, the one having highest covalent character is
(a) CaF2
(b) Cacl2
(c) CaBr2
(d) Cal2

Q109. The strongest acid of the following is
(a) p-chlorophenol
(b) m-nitrophenol
(c) p-nitrophenol
(d) o-nitrophenol

Q110. Basicity of boric acid, H3BO3 is
(a) 2
(b) 3
(c) 4
(d) 5

Q111. The most volatile of the given liquids is
(a) ether
(b) liquid
(c) liquid NH3
(d) liquid He

Q112. Which of the following is not an addition polymer
(a) Nylon
(b) PVC
(c) Polythene
(d) Polystyrene

Q113. The metal present in vitamin B12 is
(a) Fe
(b) Co
(c) Mg
(d) Mo

Q114. Which of the following is not present in RNA
(a) Thymine
(b) Uracil
(c) Ribose
(d) Phosphate

Q115. Molality of pure water is
(a) 18.00
(b) 1.80
(c) 5.55
(d) 55.5

Q116. Which of the following molecules has a bond order of 2.5
(a) HCL
(b) CO
(c) F2
(d) NO

Q117. 0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by
(a) 3
(b) 4
(c) 6
(d) 7

Q118. If a buffer solution is diluted its pH
(a) is increased
(b) remains same
(c) is decreased
(d) will slowly increase and then it will decrease

Q119. The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas
(a) remains unchanged
(b) will be doubled
(c) will increase four-fold
(d) will be reduced to half

Q120. Forth floatation process to concentrate the minerals is applicable to
(a) Calamine
(b) Chalcopyrites
(c) Bauxite
(d) Haematite

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