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Recent questions in 2019
Questions
>>
JEEMAIN and NEET
>>
NEET PAST PAPERS
>>
2019
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region ?
neet
chemistry
past papers
2019
33
asked
Jul 8, 2019
by
pady_1
2
answers
Which one is malachite from the following ?
neet
chemistry
past papers
2019
32
asked
Jul 8, 2019
by
pady_1
1
answer
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor.M is :
neet
chemistry
past papers
2019
31
asked
Jul 8, 2019
by
pady_1
1
answer
An alkene "A" on reaction with
O
3
and
Z
n
−
H
2
O
gives propanone and ethanal in equimolar ratio.Addition of HCl to alkene "A" gives "B" as the major product. The structure of product "B" is :-
neet
chemistry
past papers
2019
30
asked
Jul 8, 2019
by
pady_1
1
answer
Which is the correct thermal stability order for
H
2
E
(E=O, S, Se, Te and Po) ?
neet
chemistry
past papers
2019
28
asked
Jul 8, 2019
by
pady_1
1
answer
Match the Xenon compounds in Coloumn - I with its structure in Column - II and assigning the correct code:
neet
chemistry
past papers
2019
27
asked
Jul 8, 2019
by
pady_1
1
answer
The biodegradable polymer is :-
neet
chemistry
past papers
2019
26
asked
Jul 8, 2019
by
pady_1
1
answer
4d, 5d, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :-
neet
chemistry
past papers
2019
25
asked
Jul 8, 2019
by
pady_1
1
answer
Identify the incorrect statement related to
P
C
l
5
from the following :-
neet
chemistry
past papers
2019
24
asked
Jul 8, 2019
by
pady_1
1
answer
If the rate constant for a first order reaction is k,the time (t) required for the completion of 90% of the reaction is given by :-
neet
chemistry
past papers
2019
23
asked
Jul 8, 2019
by
pady_1
1
answer
For the second period elements the correct increasing order of first ionisation enthalpy is :-
neet
chemistry
past papers
2019
22
asked
Jul 8, 2019
by
pady_1
1
answer
The manganate and permanganate ions are tetrahedral, due to
neet
chemistry
past
papers
2019
21
asked
Jul 8, 2019
by
pady_1
1
answer
Which of the following is an amphoteric hydroxide?
neet
chemistry
past papers
2019
19
asked
Jul 8, 2019
by
pady_1
1
answer
Which of the following species is not stable ?
neet
chemistry
past papers
2019
18
asked
Jul 8, 2019
by
pady_1
1
answer
Which will make basic buffer ?
neet
chemistry
past papers
2019
15
asked
Jul 8, 2019
by
pady_1
1
answer
Conjugate base for Bronsted acids
H
2
O
and HF are:-
neet
chemistry
past
papers
2019
14
asked
Jul 8, 2019
by
pady_1
1
answer
Which mixture of the solutions will lead to the formation of negatively charged colloidal
[
A
g
I
]
I
−
sol. ?
neet
chemistry
past papers
2019
13
asked
Jul 8, 2019
by
pady_1
1
answer
The correct order of the basic strength of methyl substituted amines in aqueous solution is :-
neet
chemistry
past papers
2019
12
asked
Jul 8, 2019
by
pady_1
1
answer
Among the following, the narrow spectrum antibiotic is
neet
chemistry
past papers
2019
11
asked
Jul 8, 2019
by
pady_1
1
answer
Which of the following reactions are disproportionation reaction ? (a)
2
C
u
+
→
C
u
2
+
+
C
u
0
(b)
3
M
n
O
2
−
4
+
4
H
+
→
2
M
n
O
−
4
+
M
n
O
2
(c)
2
K
M
n
O
4
Δ
→
K
2
M
n
O
4
+
M
n
O
2
+
O
2
(d)
2
M
n
O
−
4
+
3
M
n
2
+
+
2
H
2
O
⟶
5
M
n
O
2
+
4
H
⊕
Select the correct option from the following
neet
chemistry
past papers
2019
10
asked
Jul 8, 2019
by
pady_1
1
answer
Which of the following diatomic molecular species has only
π
bonds according to Molecular Orbital theory?
neet
chemistry
past papers
2019
9
asked
Jul 8, 2019
by
pady_1
1
answer
The number of sigma
(
σ
)
and pi
(
π
)
bonds in pent-2-en-4-yne is :-
neet
chemistry
past papers
2019
8
asked
Jul 8, 2019
by
pady_1
1
answer
Among the following, the one that is not a green house gas is :-
neet
chemistry
past papers
2019
7
asked
Jul 8, 2019
by
pady_1
1
answer
For a cell involving one electron
E
⊖
cell = 0.59V at 298 K, the equilibrium constant for the cell reaction is :-
[
G
i
v
e
n
t
h
a
t
2.303
R
T
F
=
0.059
V
a
t
T
=
298
k
]
neet
chemistry
past papers
2019
6
asked
Jul 8, 2019
by
pady_1
1
answer
For an ideal solution, the correct option is :-
neet
chemistry
past papers
2019
5
asked
Jul 8, 2019
by
pady_1
1
answer
The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :-
neet
chemistry
past papers
2019
4
asked
Jul 8, 2019
by
pady_1
2
answers
pH of a saturated solution of
C
a
(
O
H
)
2
is 9. The solubility product
(
K
s
p
)
of
C
a
(
O
H
)
2
is :-
neet
chemistry
past papers
2019
3
asked
Jul 8, 2019
by
pady_1
1
answer
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :-
neet
chemistry
past papers
2019
2
asked
Jul 8, 2019
by
pady_1
1
answer
Under isothermal condition, a gas at 300 K expands from 0.1L to 0.25L against a constant external pressure of 2 bar. The work done by the gas is :- [Given that 1L bar = 100 J]
neet
chemistry
past papers
2019
1
asked
Jul 8, 2019
by
pady_1
1
answer
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