NEET REVISON TEST XVII (28.03.2026)

PHYSICS

1. 5, √3
2. 4, √5
3. 10, √2
4. 10, 2Deselect Answer

Deselect Answer

77. The correct sequence of reagents to obtain iodoethane from ethanol, among the options provided, is:

1. a- Red P,Br₂; b-AgF
2. a-H₂SO₄/heat; b- I₂/ CCl₄
3. a-KMnO₄; b-SOCl₂
4. a-Red P, Br₂; b-NalDeselect Answer

78. Consider the following statements:
A. Benzene gives substitution reaction more readily than addition reaction.
B. In benzyne mechanism reaction intermediate is carbanion also.
C. Tertiary alcohol always gives S_N1 reaction.
D. Reactivity of alcohol is very poor for SN reaction because alcohol is strongly acidic in character.
Of these statements:

1. only a is correct.
2. a and c are correct
3. a, b, and d are correct
4. a, b and c are correctDeselect Answer

79. The unpaired electron in Eu³⁺ will bear similarities to that found in:

1. Yb²⁺
2. Ho³⁺ 
3. Sm²⁺
4. Gd³⁺Deselect Answer

80. Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R):
Assertion (A): Helium is used to dilute oxygen in the diving apparatus.
Reason (R): Helium has a high solubility in
In light of the above statements, choose the correct answer from the options given below:

1. (A) is False but (R) is True.
2. Both (A) and (R) are True and (R) is the correct explanation of (A).
3. Both (A) and (R) are True and (R) is not the correct explanation of (A).
4. (A) is True but (R) is False.Deselect Answer

81. In view of the signs of ∆_r G° for the following reactions:
PbO₂  + Pb → 2PbO, ∆_r G° < 0
SnO₂ + Sn → 2PbO, ∆_r G° < 0
The oxidation states more characteristic for lead and tin are respectively:

1. For lead +2, for tin +2
2. For lead +4, for tin +4
3. For lead +2, for tin +4
4. For lead +4, for tin +2Deselect Answer

82. Consider the following reaction:

The products A and B, respectively, are:

Deselect Answer

83. The activation energy of a reaction can be determined from the slope of which of the following graphs?

1. In K vs T
2. In K/T  vs T
3. In K vs 1/T
4. In  K/T  vs  1/TDeselect Answer

84. Match List-I with List-II:

Choose the correct answer from the options given below:

     (A)       (B)       (C)       (D)
1.  (III)      (I)        (II)      (IV)
2.  (II)      (III)      (IV)      (I)
3.  (III)     (II)       (I)        (IV)
4.  (IV)     (III)      (II)       (I)Deselect Answer

85. The shortest wavelength of the Paschen series for H-atom is:

1. 9/R
2. 16/R
3. 144/7R
4. 7R/144Deselect Answer

86. Consider the following reaction and identify the product (P):

Deselect Answer

87. In a set of reactions, propanoic acid yielded a compound D.

The structure of compound D would be:

1. CH₃ CH₂ CH₂ NH₂
2. CH₃ CH₂CONH₂
3. CH₃CH₂ NHCH₂
4. CH₃ CH₂ NH₂Deselect Answer

89. The molar solubility of CaF₂ (K_sp = 5.3×10^-11) in 0.1 M solution of NaF will be:

1. 5.3×10^-11 mol L^-1
2. 5.3×10^-8 mol L^-1
3. 5.3×10^-9 mol L^-1
4. 5.3×10^-10 mol L^-1Deselect Answer