JEE MAIN - Chemistry (2019 - 8th April Evening Slot)
1
For the solution of the gases w, x, y and z in
water at 298K, the Henrys law constants (KH)
are 0.5, 2, 35 and 40 kbar, respectively. The
correct plot for the given data is :-
Answer
(A)
2
Polysubstitution is a major drawback in:
Answer
(B)
Friedel Craft's alkylation
3
If p is the momentum of the fastest electron
ejected from a metal surface after the irradiation
of light having wavelength $$\lambda $$, then for 1.5 p
momentum of the photoelectron, the
wavelength of the light should be:
(Assume kinetic energy of ejected
photoelectron to be very high in comparison
to work function)
Answer
(C)
4/9 $$\lambda $$
4
Fructose and glucose can be distinguished by :
Answer
(C)
Seliwanoff's test
5
The major product obtained in the following
reaction is
Answer
(B)
6
The correct statement about ICl5 and $$ICl_4^-$$ is
Answer
(A)
ICl5 is square pyramidal and $$ICl_4^-$$ is square
planar.
7
Which of the following compounds will show
the maximum 'enol' content?
Answer
(B)
CH3COCH2COCH3
8
5 moles of an ideal gas at 100 K are allowed
to undergo reversible compression till its
temperature becomes 200 K.
If CV = 28 JK–1mol–1, calculate $$\Delta $$U and $$\Delta $$pV for
this process. (R = 8.0 JK–1 mol–1]
Answer
(A)
$$\Delta $$U = 14 kJ; $$\Delta $$(pV) = 4 kJ
9
The major product obtained in the following
reaction is :
Answer
(C)
10
The statement that is INCORRECT about the
interstitial compounds is :
Answer
(A)
They are chemically reactive
11
For a reaction scheme $$A\buildrel {{k_1}} \over
\longrightarrow B\buildrel {{k_2}} \over
\longrightarrow C$$,
if
the rate of formation of B is set to be zero then
the concentration of B is given by :
Answer
(B)
$$\left( {{{{k_1}} \over {{k_2}}}} \right)[A]$$
12
The major product of the following reaction is:
Answer
(C)
13
Among the following molecules / ions,
$$C_2^{2 - },N_2^{2 - },O_2^{2 - },{O_2}$$
which one is diamagnetic and has the shortest
bond length?
Answer
(B)
$$C_2^{2 - }$$
14
The calculated spin-only magnetic moments
(BM) of the anionic and cationic species of
[Fe(H2O)6]2 and [Fe(CN)6], respectively, are :
Answer
(B)
4.9 and 0
15
Which one of the following alkenes when
treated with HCl yields majorly an anti
Markovnikov product?
Answer
(B)
F3C – CH = CH2
16
The covalent alkaline earth metal halide
(X = Cl, Br, I) is :
Answer
(D)
BeX2
17
The compound that inhibits the growth of
tumors is :
Answer
(C)
cis-[Pt(Cl)2(NH3)2]
18
The IUPAC symbol for the element with atomic
number 119 would be :
Answer
(C)
uue
19
The percentage composition of carbon by mole
in methane is :
Answer
(B)
20%
20
The major product of the following reaction is:
Answer
(D)
21
The ion that has sp3d2 hybridization for the
central atom, is :
Answer
(B)
[ICl4]-
22
For the following reactions, equilibrium
constants are given :
S(s) + O2(g) ⇋ SO2(g); K1 = 1052
2S(s) + 3O2(g) ⇋ 2SO3(g); K2 = 10129
The equilibrium constant for the reaction,
2SO2(g) + O2(g) ⇋ 2SO3(g) is :
Answer
(B)
1025
23
The major product in the following reaction is :
Answer
(A)
24
Calculate the standard cell potential in (V) of the
cell in which following reaction takes place :
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