Chemistry_Today_April_2017_vk_com_stopthepress

PRACTICE PAPER
AIIMS
AIIMS
Exam on
28 th May
1. The reaction, SO 2 Cl 2 SO 2 + Cl 2 is a first 7. Occluded hydrogen means
(c) 6.023 × 10 14 mol –1 (d) 6.023 × 10 15 mol –1
order reaction with k = 2.2 × 10 –5 s –1 at 320°C. (a) dehydrogenation
The percentage of SO 2 Cl 2 that is decomposed on (b) hardening of oils
heating after 30 minutes will be
(c) hydrogen adsorbed on metals
(a) 3.8% (b) 65.4% (c) 39.5% (d) 48.5%
(d) hydrogen as fuel.
2. ICl – 4 is iso-structural with
8. When conc. H 2 SO 4 was added into an unknown salt
–
(a) IBr 2 (b) BrO – present in a test tube, a brown gas (A) was evolved.
3 (c) CH 4 (d) XeF 4
This gas intensified when copper turnings were also
3. Analysis shows that a metal oxide has the empirical
formula M 0.96 O 1.00 . The percentage of M 2+ ion in
this crystal is
added into this test tube. On cooling, the gas (A)
changed into a colourless gas (B). Identify the gases
A and B.
(a) 91.67 (b) 8.33 (c) 45.83 (d) 22.92
(a) NO 2 and NO 2 (b) NO 2 and N 2 O 3
4.
(c) NO
1
2 and NO (d) NO 2 and N 2 O 4
th of Avogadro number of atoms of an element
4
9. Major product of the following reaction will be
absorb energy ‘X’ kJ for ionisation, the ionisation
CH 3
energy (kJ) of an atom is
2X
(a) (b) 4 X 4N
(c) 0
(d) N C 2 H 5 ONa + CH 3
C Cl
0
CH
N0
N0
X X
3
CH 3
5. Oxidising power of chlorine in aqueous solution
can be determined by the parameters indicated
(a) CH 3
C OC 2
H 5
(b) CH 3
C CH 2
below,
CH 3
CH 3
CH 3
The energy involved in the conversion of 1 2 Cl (c) CH 2 CH 2 (d) CH 3
C OCH 3
2(g) to
CH 2 5
Cl – (aq) (using data, ∆ diss. H° = 240 kJ mol –1 ,
∆ eg H° Cl = – 349 kJ mol –1 , ∆ hyd. H° = – 381 kJ mol –1 )
10. How many grams of concentrated nitric acid
should be used to prepare 250 mL of 2.0 M HNO 3 ?
(The concentrated acid contains 70% HNO 3 .)
will be
(a) 120 kJ mol –1 (b) 150 kJ mol –1
(a) 70.0 g
(b) 54.0 g
(c) 45.0 g
(d) 90.0 g
(c) –610 kJ mol –1 (d) –850 kJ mol –1
11. What will be the mass of NaCl produced when
6. If NaCl is dopped with 10 –4 mole percent of SrCl 2 ,
the concentration of cation vacancies will be
1.00 mol L –1 aqueous solution of sodium hydroxide
is neutralised by 200 mL of 2.00 mol L –1 aqueous
(a) 6.023 × 10 16 mol –1 (b) 6.023 × 10 17 mol –1 hydrochloric acid?
(a) 23.4 g (b) 58.5 g
(c) 29.2 g (d) 87.7 g
CHEMISTRY TODAY | APRIL ‘17 39