1 What is the correction term in the pressure for real gas in comparison to the ideal gas? A) $\frac{n^{2}}{V^{2}}$ B) $\frac{aV^{2}}{n^{2}}$ C) $\frac{an^{2}}{V^{2}}$ D) $\frac{an^{2}}{V^{}}-nb$
2 For the reaction , $0.5 C(s)+0.5 CO_{2}(g)\rightleftharpoons CO(g)$ the equilibrium pressure is 12 atm . If CO2 conversion is 50% the value of Kp, in atm is A) 4 B) 1 C) 0.5 D) 2
3 The freezing point of solution containing 10 mL of non-volatile and non-electrolyte liquid " A" in 500 g of water is $-0.413^{0} C$. If $K_{f}$ of water is 1.86 K kg $mol^{-1}$ and the molecular weight of A=60 g $mol^{-1}$, what is the density of the solution in g $mL^{-1}$ ? (Assume $\triangle _{mix}$v=0) A) 1.13 B) 1.3 C) 0.90 D) 0.993
4 Which one of the following is used as an eye lotion? A) milk of magnesia B) silver sol C) colloidal antimony D) Chromium salt sol
5 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
6 A polymer contain 50 molecules with molecular mass 5000 ,100 molecules with molecular mass 10000 and 50 molecules with molecular mass 15,000 . Calculate number average molecular mass ? A) 5000 B) 75,000 C) 10,000 D) 20,000
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 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
9 The enthalpy change for freezing of 1 g of water at 1 bar and $0^{0}$ C is 334 J . Calculate the internal energy change in J when 1g of water is converted into ice? A) 205 B) 334 C) 0 D) 668
10 What is the bonding nature in LiCl bond? A) Pure ionic B) pure covalent C) coordinate bond D) ionic and covalent
11 Calculate the depression in the freezing point of a solution containing 0.1 g of $K_{3}[Fe(CN)_{6}]$ in 100 g of $H_{2}O$? (molecular weight of $K_{3}[Fe(CN)_{6}]$ =369; $K_{f}$=1.86 K Kg mol-1) A) 0 B) 1.223 C) 0.0226 D) 0.226
12 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
13 Benzaldehyde can be converted to benzonitrile by treatment with A) $NH_{3}$ B) $NH_{3}$ followed by reaction $C_{6}H_{5}SO_{2}Cl$ C) $NH_{2}OH $ followed by reaction with acetic anhydride D) $NH_{4}OH$
14 The elements with the highest and lowest electron gain enthalpy in group 16 respectively are A) O;Te B) O;Po C) S;O D) S;Te
15 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) $C_{8}H_{8}$