JEE MAIN - Chemistry (2019 - 9th April Morning Slot)
1
The major product of the following reaction is :
Answer
(D)
2
The major product of the following reaction is :
$${\rm{C}}{{\rm{H}}_3}{\rm{CH = CHC}}{{\rm{O}}_2}{\rm{CH_3 }}\buildrel {LiAl{H_4}} \over
\longrightarrow $$
Answer
(C)
CH3CH = CHCH2OH
3
The increasing order of reactivity of the
following compounds towards aromatic
electrophilic substitution reaction is :
Answer
(B)
D < A < C < B
4
The major product of the following reaction is :
Answer
(C)
5
The standard Gibbs energy for the given cell
reaction in kJ mol–1 at 298 K is :
Zn(s) + Cu2+ (aq) $$ \to $$ Zn2+ (aq) + Cu (s),
E° = 2 V at 298 K
(Faraday's constant, F = 96000 C mol–1)
Answer
(C)
–384
6
Among the following, the set of parameters that
represents path function, is :
(A) q + w
(B) q
(C) w
(D) H–TS
Answer
(A)
(B) and (C)
7
The osmotic pressure of a dilute solution of an
ionic compound XY in water is four times that
of a solution of 0.01 M BaCl2 in water.
Assuming complete dissociation of the given
ionic compounds in water, the concentration of
XY (in mol L–1) in solution is :
Answer
(B)
6 × 10–2
8
The correct IUPAC name of the following
compound is :
Answer
(B)
2-chloro-1-methyl-4-nitrobenzene
9
The given plots represent the variation of the
concentration of a reactant R with time for two
different reactions (i) and (ii). The respective
orders of the reactions are :
Answer
(B)
1,0
10
For a reaction,
N2(g) + 3H2(g) $$ \to $$ 2NH3(g) ;
identify dihydrogen (H2) as a limiting reagent
in the following reaction mixtures.
Answer
(A)
56g of N2 + 10g of H2
11
The one that will show optical activity is :
(en = ethane-1,2-diamine)
Answer
(C)
12
Among the following, the molecule expected
to be stabilized by anion formation is :
C2, O2, NO, F2
Answer
(A)
C2
13
Which of the following statements is not true
about sucrose?
Answer
(A)
The glycosidic linkage is present between
C1 of $$\alpha $$-glucose and C1 of $$\beta $$-fructose
14
The organic compound that gives following
qualitative analysis is :
Test
Inference
(a)
Dil. HCl
Insoluble
(b)
NaOH solution
soluble
(c)
Br2/water
Decolourization
Answer
(A)
15
The major product of the following reaction is :
Answer
(A)
16
The degenerate orbitals of [Cr(H2O)6]3+ are :
Answer
(B)
dxz and dyz
17
The correct order of the oxidation states of
nitrogen in NO, N2O, NO2 and N2O3 is :
Answer
(C)
N2O < NO < N2O3 < NO2
18
The major product of the following reaction is :
Answer
(C)
CH3C(I)(Cl)CHD2
19
For any given series of spectral lines of atomic
hydrogen, let $$\Delta \mathop v\limits^\_ = $$ $$\Delta {\overline v _{\max }} - \Delta {\overline v _{\min }}$$ be the difference
in maximum and minimum frequencies in
cm–1. The ratio Lyman Balmer $${{\Delta {{\overline v }_{Lyman}}} \over {\Delta {{\overline v }_{Balmer}}}}$$ is :
Answer
(A)
9 : 4
20
The element having greatest difference between
its first and second ionization energies, is :
Answer
(D)
K
21
Aniline dissolved in dilute HCl is reacted with
sodium nitrite at 0ºC. This solution was added
dropwise to a solution containing equimolar
mixture of aniline and phenol in dil. HCl. The
structure of the major product is
Answer
(C)
22
Liquid 'M' and liquid 'N' form an ideal solution.
The vapour pressures of pure liquids 'M' and
'N' are 450 and 700 mmHg, respectively, at the
same temperature. Then correct statement is:
(xM = Mole fraction of 'M' in solution ;
xN = Mole fraction of 'N' in solution ;
yM = Mole fraction of 'M' in vapour phase ;
yN = Mole fraction of 'N' in vapour phase)
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