1 Identify the oxidation states of Mn, when $MnO_{4}^{2-}$ ion undergoes disproportionation reaction under acidic medium A) +2,+7 B) +2,+5 C) +4,+4 D) +7,+4
2 Which of the following products are formed on hydrolysis of $NaO_{2}$? (A) NaOH (B) $H_{2}O_{2}$ (C) $O_{2}$ (D) $H_{2}O$ A) A,D B) A, C, D C) A, B, D D) A, B, C
3 $\triangle H^{0}_{f}$ values (in $ kJ mol ^{1}$) for graphite , diamond and $C_{60}$ are respectively A) 0;1.9;38.1 B) 1.8;1.9;38.1 C) 0;0;21.4 D) 1.8;1.9;2.0
4 Statement (A) Sulphur vapour is paramagnetic Statement (B) Reaction of dil.HCl with finely divided iron forms $FeCl_{3}$ and $H_{2}$ gas The correct answer is A) Statement (A) is correct, but (B) is wrong B) Both the statement are correct C) Statement (A) is wrong , but (B) is correct D) Both the statement s are wrong
5 The boiling point (in K) of cis but-2-ene and dipole moment (in D) of trans but-2-ene are respectively A) 274,0.00 B) 277,0.00 C) 277,0.33 D) 274,0.33
6 How many grams of glucose are required to prepare an aqueous solution of glucose having a vapour pressure of 23.324 mm Hg at $25^{0} C $ in 100 g of water? The vapour pressure of pure water at $25^{0}C$ is 23.8 mmHg. (Molar mass of glucose =180 g mol-1) A) 20.4 B) 10.3 C) 1 D) 1.83
7 Find the suitable method from the following to prepare primary amines without the loss of carbons A) Gabriel method B) Alkylation method C) Hoffman Bromamide method D) Stephen method
8 The maximum number of electrons that can have the set of quantum numbers, n=4, ml=0 and ms = 1/2 is A) 3 B) 4 C) 5 D) 6
9 A spherical ball of radius 7 cm contains 56 w% iron. Find out the number of moles of iron present approximately in the ball? (d=1.4 g cm-3, atomic mass =56 g mol-1) A) 15.1 B) 20.1 C) 25.1 D) 35.1
10 What is the bonding nature in LiCl bond? A) Pure ionic B) pure covalent C) coordinate bond D) ionic and covalent
11 A solution of 17.1 w% of surcose (molar mass =$342g mol^{-1}$) is isotonic with a x w% solution of oxalic acid (molar mass =90g mol-1) . assume the degree of dissociation of oxalic acid as 0.01 . what is x? A) 9 B) 0.45 C) 4.41 D) 0.90
12 In the Millikan's oil drop method, which of the following force does not act on the oil drop? A) Gravitational force B) Viscose force C) Magnetic force D) Electrostatic force
13 The vapour pressure of pure $CCl_{4}$ (molar mass=154 g mol-1) and $SnCl_{4}$ (molar mass=170 g mol-1) at $25^{0} C$ are 115.0 and 238.0 torr respectively . Assuming ideal behaviour , calculate the total approximate vapour pressure in torr of a solution containing 10 g of $CCl_{4}$ and 15 g of $SnCl_{4}$. A) 185.85 B) 190.0 C) 180.7 D) 182.1
14 A camphor sample melts at $176 ^{0} C.$ $K_{f}$ for camphor is 40 K kg mol-1 . A solution of 0.02g of a hydrocarbon in 0.8 g of camphor melts at $156.77^{0}C$ . Hydrocarbon is made up of 92.3% of carbon. What is the molecular formula of the hydrocarbon? A) $C_{6}H_{6}$ B) $C_{12}H_{12}$ C) $C_{4}H_{4}$ D) $C_{8}H_{8}$
15 The products formed during the reaction of carbon with conc. $H_{2}SO_{4}$ are $C+ H_{2}SO_{4} $ $\underrightarrow{ \triangle}$ products A) $CO, SO_{2}, H_{2}O$ B) $CO_{2}, SO_{2}, H_{2}O$ C) $CO, CO_{2},H_{2}O$ D) $SO_{2}, H_{2}O$
