The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are)
Answer
A
B
D
2
Geometrical shapes of the complexes formed by the reaction of Ni2+ with Cl-, CN- and H2O respectively are
Answer
(B)
tetrahedral, square planar and octahedral
3
According to kinetic theory of gases
Answer
A
C
D
4
To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mol of He and 1.0 mol of an unknown compound (vapour pressure 0.68 atm, at 0oC) are introduced. Considering the ideal gas behaviour, the total volume (in litre) of the gases at 0oC is close to
Answer
7
5
Among the following compounds, the most acidic is
Answer
(C)
o-hydroxybenzoic acid
6
Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is
Answer
(C)
2.05 M
7
Extraction of metal from the ore cassiterite involves
Answer
A
C
D
8
The maximum number of electrons that can have principal quantum number, n = 3, and spin quantum number, ms = − 1/2 , is
Answer
9
9
The work function
( φ )
of some metals is listed below. The number of metals which will show
photoelectric effect when light of 300 nm wavelength falls on the metal is
Metal
Li
Na
K
Mg
Cu
Ag
Fe
Pt
W
Ф (eV)
2.4
2.3
2.2
3.7
4.8
4.3
4.7
6.3
4.75
Answer
4
10
The difference in the oxidation numbers of the two types of sulphur atoms in Na2S4O6 is
Answer
5
11
Bombardment of aluminium by $$\alpha$$-particle leads to its artificial disintegration in two ways : (i) and (ii) as shown. Products X, Y and Z, respectively, are
Answer
(A)
proton, neutron, positron.
12
AgNO3(aq.) was added to an aqueous KCl solution gradually and the conductivity of the solution was measured. The plot of conductance ($$\Lambda $$) versus the volume of AgNO3 is
Answer
(D)
(S)
13
The major product of the following reaction is
Answer
(A)
14
Extra very pure N2 can be obtained by heating
Answer
(D)
Ba(N3)2
15
Among the given options, the compound(s) in which all the atoms are in one plane in all the possible conformations (if any) is(are)
Answer
B
C
16
The structure of compound P is
Answer
(D)
17
The structure of the compound Q is
Answer
(B)
18
The metal rod M is
Answer
(B)
Cu
19
The compound N is
Answer
(A)
AgNO3
20
The final solution contains :
Answer
(C)
$${[Ag{(N{H_3})_2}]^ + }$$ and $${[Cu{(N{H_3})_4}]^{2 + }}$$
21
Reaction of Br2 with Na2CO3 in aqueous solution gives sodium bromide and sodium bromate with evolution of CO2 gas. The number of sodium bromide molecules involved in the balanced chemical equation is ________.
Answer
5
22
The total number of alkenes possible by dehydrobromination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is _______.
Answer
5
23
A decapeptide (mol. wt. 796) on complete hydrolysis gives glycine (mol. wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is _________.
