Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process
is(are)
Answer
B
C
D
3
All the energy released from the reaction $$X \to Y, \Delta _tG^o $$ = -193 kJ mol-1 is used for oxidizing M+ as M+ $$\to$$ M3+ + 2e-, Eo = -0.25 V
Under standard conditions, the number of moles of M+ oxidized when one mole of X is converted to Y is
[F = 96500 C mol–1]
Answer
4
4
If the freezing point of a 0.01 molal aqueous solution of a cobalt (III) chloride-ammonia complex(which
behaves as a strong electrolyte) is – 0.0558oC, the number of chloride(s) in the coordination sphere of the
complex is [Kf of water = 1.86 K kg mol–1 ]
Answer
1
5
If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are
Answer
(A)
1/2, 1/8
6
Match the thermodynamics processes given under column I with expression given under column II
Column I
(A) Freezing water at 273 K and 1 atm
(B) Expansion of 1 mol of an ideal gas into a vacuum under isolated conditions.
(C) Mixing of equal volumes of two ideal gases at constant temperature and pressure in an isolated container.
(D) Reversible heating of H2(g) at 1 atm from 300K to 600K, followed by reversible cooling to 300K at 1 atm
Column II
(p) q = 0
(q) w = 0
(r) $$\Delta S_{sys}$$ < 0
(s) $$\Delta U$$ = 0
(t) $$\Delta G$$ = 0
Answer
(C)
A $$\to$$ r,t; B $$\to$$ p,q,s; C $$\to$$ p,q,s; D $$\to$$ p,q,s,t;
7
Among the triatomic molecules/ions, BeCl2, $$N_3^-$$, N2O, $$NO_2^+$$, O3, SCl2, $$ICl_2^-$$, $$I_3^-$$ and XeF2, the total number of linear molecule(s)/ion(s) where the hybridization of the central atom does not have contribution from the d-orbital(s) is
[Atomic number: S = 16, Cl = 17, I = 53 and Xe = 54]
Answer
4
8
Not considering the electronic spin, the degeneracy of the second excited state( n = 3) of H atom is 9, while
the degeneracy of the second excited state of H– is ___________.
Answer
3
9
The total number of stereoisomers that can exist for M is ___________.
Answer
2
10
The number of resonance structure for N is _________.
Answer
9
11
The number of lone pairs of electrons in N2O3 is ___________.
Answer
8
12
For the octahedral complexes of Fe3+ in SCN$$-$$ (thiocyana-to-S) and in CN$$-$$ ligand environments, the difference between the spin-only magnetic moments in Bohr magnetons (when approximated to the nearest integer) is __________.
[Atomic number Fe = 26]
Answer
4
13
Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is(are)
Answer
B
D
14
The major product of the following reaction is
Answer
(A)
15
In the following reaction, the major product is
Answer
(D)
16
The structure of D-(+)-glucose is
The structure of L-($$-$$)-glucose is
Answer
(A)
17
The major product of the reaction is
Answer
(C)
18
The correct statements about Cr2+ and Mn3+ is(are) (Atomic numbers of Cr = 24 and Mn = 25)
Answer
A
B
C
19
Fe3+ is reduced to Fe2+ by using
Answer
A
B
20
The % yield of ammonia as a function of time in the reaction
N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g), $$\Delta$$H < 0 at (P, T1) is given below:
If this reactions is conducted at (P, T2), with T2 > T1, the % yield of ammonia as a function of time is represented by