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(d) HC 3 NH C
O
SECTION 2 (Maximum Marks : 32)
• This section contains EIGHT questions.
• Each question has FOUR options (a), (b), (c) and (d). ONE OR
MORE THAN ONE of these four option(s) is(are) correct.
• For each question, darken the bubble(s) corresponding to all the
correct option(s) in the ORS.
• For each question, marks will be awarded in one of the following
categories :
Full Marks : +4 If only the bubble(s) corresponding to all the
correct option(s) is(are) darkened.
Partial Marks : +1 For darkening a bubble corresponding
to each correct option, provided NO incorrect option is
darkened.
Zero Marks : 0 If none of the bubbles is darkened.
Negative Marks : –2 In all other cases.
• For example, if (a), (c) and (d) are all the correct options for
a question, darkening all these three will result in +4 marks;
darkening only (a) and (d) will result in +2 marks; and darkening (a)
and (b) will result in –2 marks, as a wrong option is also darkened.
25. Some oxidation reactions of methane are given
below. Which of them is/are controlled oxidation
reactions?
(a) CH 4(g) + 2O 2(g) CO 2(g) + 2H 2 O (l)
(b) CH 4(g) + O 2(g) C (s) + 2H 2 O (l)
(c) CH 4(g) + O Mo 2 O 3
2(g) HCHO + H 2 O
Cu/523 K/100 atm
(d) 2CH 4(g) + O 2(g) 2CH 3 OH
26. Which of the following conditions show the
polluted environment ?
(a) pH of rain water is 5.6
(b) Amount of carbon dioxide in the atmosphere is
0.03%
(c) Biochemical oxygen demand is 10 ppm
(d) Eutrophication
27. Which of the following compounds give(s) colour
due to charge transfer transitions?
(a) Cu 2 O (b) [Fe(H 2 O) 5 NO]SO 4
(c) Ni-dmg complex (d) NiSO 4 .7H 2 O
28. The correct functional group X and the reagent/
reaction conditions Y in the following reaction are
(i) Y
X(CH 2 ) 4 X
Condensation
O
O
polymer
(ii) C (CH 24 ) C
HO
OH
(a) X = COOCH 3 , Y = H 2 /Ni/heat
(b) X = CONH 2 , Y = H 2 /Ni/heat
(c) X = CONH 2 , Y = Br 2 /NaOH
(d) X = CN, Y = H 2 /Ni/heat
29. How many a- and b-particles will be emitted
respectively when 232 90 Th converts into 208 82 Pb?
(a) 6, 4 (b) 4,6 (c) 5,5 (d) 3,6
30. Select the correct statements.
(a) In the decomposition of an oxide into metal,
entropy increases.
(b) To make DG negative, TDS > DH.
(c) Ellingham diagram represents change in free
energy with temperature.
(d) Reduction of an oxide with aluminium is called
van Arkel process.
31. Which reagent does not give oxygen as one of the
products during oxidation with ozone?
(a) SO 2
(b) SnCl 2 /HCl
(c) H 2 S
(d) PbS
32. Which of the following statements is/are correct
when a mixture of NaCl and K 2 Cr 2 O 7 is gently
warmed with conc. H 2 SO 4 ?
(a) Deep red vapours are evolved.
(b) Vapours when passed into NaOH solution
gives a yellow solution of Na 2 CrO 4 .
(c) Chlorine gas is evolved.
(d) Chromyl chloride is formed.
SECTION 3 (Maximum Marks : 12)
• This section contains TO paragraphs.
• ased on each paragraph, there are TO questions.
• Each question has FOUR options (a), (b), (c) and (d). ONLY ONE
of these four options is correct.
• For each question, darken the bubble corresponding to the
correct option in the ORS.
• For each question, marks will be awarded in one of the following
categories :
Full Marks : +3 If only the bubble corresponding to the correct
option is darkened.
Zero Marks : 0 In all other cases.
PARAGRAPH 1
During the detection of elements by Lassaigne’s test,
the covalent compounds are converted into ionic
compounds by fusion with metallic sodium. The
nitrogen, sulphur and halogens present in the organic
compound are converted into cyanides, sulphides and
halides respectively which are then detected by their
usual tests.
33. An organic compound containing N, S and O as
extra elements is fused with sodium metal and
then extracted with water. The species which is not
present in the solution of extract is
(a) CN – (b) CNS – –
(c) NO 3 (d) S 2–
34. Which of the following compounds will give blood
red colour in Lassaigne’s test?
CHEMISTRY TODAY | APRIL ‘17 75