
150
NTA CUET (UG) - Science
P
W
16. Haloform test is given by
A.
Formaldehyde
B.
Acetone
C.
a
-Phenyl ethyl alcohol
D.
Acetaldehyde
Choose the correct answer from the options given below:
(a) A, B and D only (b) A, C and D only
(c)
A, B, C and D
(
d)
B, C, and D only
17.
The gas evolved when methylamine
reacts with nitrous
acid is
(a) H
2
(b) C
2
H
6
(c) N
2
(d) NH
3
18. What is the Werner secondary valence in complex
[CoCl(NH
3
)
5
]
2+
2Cl
–
?
(a) 3
(
b) 2
(c) 5
(
d) 6
19.
Match the properties given in
List-I with the metals
given in List-II
List-I
(Property)
List-II
(Metal)
A. 3d series element with
highest melting point
I. Os
B. element which can show +8
oxidation state
II. Fe
C. 3d series element with largest
number of oxidation states
III. Cr
D. constituent of Mischmetall IV. Mn
Choose the correct answer from the options given below:
(a) A - III, B - I, C - II, D - IV
(b) A - III, B - I, C - IV, D - II
(c)
A
- IV, B - II, C - I, D - III
(d) A - II, B - I, C - IV, D - III
20. The unit of Boiling point Elevation Constant (K
b
) is
(a)
K kg mol
–1
(b) K kg mol
(c)
K kg
–1
mol (d) K kg
–1
mol
–1
21. Select the correct formula for the coordination compound
“Dichloridobis(ethane-1, 2-diamine)cobalt(III) chloride”
(a) [CoCl
2
(en)
2
]Cl (b) [CoCl
2
(en)]Cl
(c) [CoCl
2
(en)
2
]C1
2
(d) [CoCl
2
(en)
2
]
22. Match List-I with List-II.
List-I
(Law/Property)
List-II
(Expression)
A. Raoult’s law I. p
total
= p
1
+ p
2
B. Dalton’s law of partial
pressures
II. p
1
= x
1
p
1
0
C. Henry’s law III. P = CRT
D. Osmotic pressure IV. p = K
H
x
Choose the
correct answer from the options given below:
(a) A - I, B - II, C - IV, D - III
(b)
A
- II, B - I, C - IV, D - III
(c)
A
- I, B - IV, C - II, D - III
(d)
A
- III, B - IV, C - I, D - II
23.
Why
does colour of KMnO
4
disappear when oxalic acid
is added to its solution in acidic medium?
(a) MnO
4
–
is reduced to MnO
2
which is colourless
(b) MnO
4
–
is reduced to Mn
2
O
4
which is colourless
(c) MnO
4
–
is oxidized to MnO
4
2–
which is colourless
(d) MnO
4
–
is reduced to Mn
2+
which is colourless
24. Choose the correct statement(s) for intermolecular
dehydration of alcohols to form ethers
A.
The formation of ether may involve a nucleophilic
bimolecular S
N
2 reaction or S
N
1 reaction
B. The method is successful with secondary and
tertiary alcohols.
C. The reaction requires protic acids
D. The reaction is carried out at low temperature.
Choose the correct answer from the options given below:
(a) A, B and D only (b) A, C and D only
(c)
A, B, C and D
(
d)
B, C and D only
25.
Select
the relation which correctly relates the variation
of Λ
m
with concentration for strong electrolytes.
(a)
Λ
m
= Λ
0
m
– Ac (b) Λ
m
= Λ
0
m
– Ac
1
2
(c) Λ
m
= Λ
0
m
+ Ac
2
(d) Λ
m
= Λ
0
m
– Ac
2
26. The number of mono bromo structural isomers formed
by free radical bromination of isopentane are
(a) 4
(
b) 2
(c) 1 (d) 3
27. The IUPAC name of the following compound is
CHO
(a) Benzaldehyde
(b) Cyclohexanealdehyde
(c) Cyclohexanal
(d) Cyclohexanecarbaldehyde
28. Arrange the following halocompounds in increasing
order of their boiling points.
A. Chloromethane
B.
Bromomethane
C. Bromoform
D. Dibromomethane
Choose the correct answer from the options given below:
(a) A, B, C, D (b) A, B, D, C
(c) B, A, D, C (d) A, D, B, C