JEE MAIN - Chemistry (2016 - 10th April Morning Slot)
1
Observation of “Rhumann’s purple” is a confirmatory test for the presence of :
Answer
(C)
Protein
2
The “N” which does not contribute to the basicity for the compound is :
Answer
(B)
N 9
3
The correct statement about the synthesis of erythritol (C(CH2OH)4) used in the preparation of PETN is :
Answer
(C)
The synthesis requires three aldol condensations and one Cannizzaro
reaction.
4
Fluorination of an aromatic ring is easily accomplished by treating a diazonium salt with HBF4. Which of the following conditions is correct about this reaction ?
Answer
(A)
Only heat
5
Which one of the following reagents is not suitable for the elimination reaction ?
Answer
(D)
NaI
6
Consider the reaction sequence below :
X is:
Answer
(D)
7
Bromination of cyclohexene under conditions given below yields :
Answer
(B)
8
Sodium extract is heated with concentrated HNO3 before testing for halogens because :
Answer
(C)
S2− and CN−, if present, are
decomposed by conc. HNO3 and hence do not interfere in the test.
9
The transition metal ions responsible for color in ruby and emerald are,
respectively :
Answer
(D)
Cr3+ and Cr3+
10
Which of the following is an example of homoleptic complex?
Answer
(A)
[Co(NH3)6]Cl3
11
Identify the correct statement :
Answer
(D)
Corrosion of iron can be minimized by forming an impermeable barrier
at its surface.
12
Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium succinate, the total volume of gases (at both cathode and anode) at STP (1 atm and 273 K) is :
Answer
(D)
8.96 L
13
The following statements concern elements in the periodic table. Which of the following is true ?
Answer
(C)
Elements of Group 16 have lower ionization enthalpy values compared
to those of Group 15 in the corresponding periods.
14
A solid XY kept in an evacuated sealed container undergoes decomposition to form a mixture of gases X and Y at temperature T. The equilibrium pressure is 10 bar in this vessel. Kp for this reaction is :
Answer
(C)
25
15
The rate law for the reaction below is given by the expression k [A] [B]
A + B $$ \to $$ Product
If the concentration of B is increased from 0.1 to 0.3 mole, keeping the value of A at 0.1 mole, the rate constant will be :
Answer
(A)
k
16
If 100 mole of H2O2 decompose at 1 bar and 300 K, the work done (kJ) by one mole of O2(g) as it expands against 1 bar pressure is :
2H2O2(l) $$\rightleftharpoons$$ 2H2O(l) + O2(g)
(R = 8.3 J K $$-$$1 mol$$-$$1)
Answer
(C)
249.00
17
An aqueous solution of a salt MX2 at certain temperature has a van’t Hoff factor of 2. The degree of dissociation for this solution of the salt is :
Answer
(B)
0.50
18
The bond angle H - X - H is the greatest in the compound :
Answer
(A)
CH4
19
Aqueous solution of which salt will not contain ions with the electronic
configuration 1s22s22p63s23p6 ?
Answer
(A)
NaF
20
The volume of 0.1N dibasic acid sufficient to neutralize 1 g of a base that furnishes 0.04 mole of OH− in aqueous solution is :
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