91. Identify a molecule which does not exist.
(1) He2 (2) Li2
(3) C2 (4) O2
92. Find out the solubility of Ni(OH)2 in 0.1 M NaOH. Given that the ionic product of Ni(OH)2 is 2 × 10–15
(1) 2 × 10–13 M (2) 2 × 10–8 M
(3) 1 × 10–13 M (4) 1 × 108 M
93. Identify the correct statements from the following :
(a) CO2(g) is used as refrigerant for ice-cream and frozen food.
(b) The structure of C60 contains twelve six carbon rings and twenty five carbon rings.
(c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
(d) CO is colorless and odourless gas.
94. Hydrolysis of sucrose is given by the following reaction.
Sucrose + H2O ⇌ Glucose + Fructose
If the equilibrium constant (KC) is 2 × 1013 at 300 K, the value of Δr
G° at the same temperature will be :
(1) –8.314 J mol–1K–1 × 300 K × ln(2 × 1013)
(2) 8.314 J mol–1K–1 × 300 K × ln(2 × 1013)
(3) 8.314 J mol–1K–1 × 300 K × ln(3 × 1013)
(4) –8.314 J mol–1K–1 × 300 K × ln(4 × 1013)
95.
(a) 
(b) 
(c) 
(d) 
96. Identify the incorrect match. Name IUPAC Official Name
(a) Unnilunium (i) Mendelevium
(b) Unniltrium (ii) Lawrencium
(c) Unnilhexium (iii) Seaborgium
(d) Unununnium (iv) Darmstadtium
(1) (a), (i) (2) (b), (ii)
(3) (c), (iii) (4) (d), (iv)
97. An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is
(1) √3/4 x 288 pm (2) √2/4 x 288 pm
(3) 4/√3 x 288 pm (4) 4/√2 x 288 pm
98. Which of the following set of molecules will have zero dipole moment?
(1) Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
(2) Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
(3) Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
(4) Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene
99. On electrolysis of dil. sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be
(1) Hydrogen gas (2) Oxygen gas
(3) H2S gas (4) SO2 gas
100. Reaction between acetone and methylmagnesium chloride followed by
hydrolysis will give :
(1) Isopropyl alcohol (2) Sec. butyl alcohol
(3) Tert. butyl alcohol (4) Isobutyl alcohol
102. Which of the following amine will give the carbyle test?
(a) 
(b) 
(c) 
(d) 
103. The calculated spin only magnetic moment of Cr2+ ion is
(1) 3.87 BM (2) 4.90 BM
(3) 5.92 BM (4) 2.84 BM
104. The correct option for free expansion of an ideal gas under adiabatic condition is
(1) q = 0, ΔT = 0 and w = 0 (2) q = 0, ΔT < 0 and w > 0
(3) q < 0, ΔT = 0 and w = 0 (4) q > 0, ΔT > 0 and w > 0
105. The freezing point depression constant (Kf) of benzene is 5.12 K kg mol–1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is (rounded off upto two decimal places) :
(1) 0.20 K
(2) 0.80 K
(3) 0.40 K
(4) 0.60 K