JEE Main, NEET MCQs Set 26

Sr. No.

Question

Answer

1.

Which of the following forms a colour less solution in aqueous medium?

(A) Ti ³⁺

(B) Sc ³⁺

(C) V ³⁺

(D) Cr ³⁺

Answer: (B)

2.

Which of the following has the maximum number of unpaired  ‘d’ electrons?

(A) Zn²⁺

(B) Fe²⁺

(C) Ni³⁺

(D) Cu⁺

Answer: (B)

3.

Which of the following has the minimum bond length?

(A) O₂

(B)

(C)

 (D)

Answer: (B)

4.

Which of the following is an intensive property?

(A) temperature

(B) surface tension

(C) viscosity

(D) all of these

Answer: (D)

5.

Which of the following is correct option for free expansion of an ideal gas under adiabatic condition?

(A) q = 0, ΔT < 0, w ≠ 0

(B) q = 0, ΔT ≠ 0, w = 0

(C) q ≠ 0, ΔT = 0, w = 0

(D) q = 0, ΔT = 0, w = 0

Answer: (D)

6.

Which of the following is least likely to behave is Lewis base?

(A) OH^–

(B) H₂O

(C) NH₃

(D) BF₃

Answer: (D)

7.

Which of the following organic compounds answers to both iodoform test and Fehling’s test’?

(A) ethanol

(B) methanal

(C) ethanal

(D) propanone

Answer: (C)

8.

Which of the following pairs of metals is purified by van Arkel method?

(A) Ni and Fe

(B) Ga and In

(C) Zr and Ti

(D) Ag and Au

Answer: (C)

9.

Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

(A) CaCl₂

(B) CaOCl₂

(C) Ca(OCl)₂

(D) CaO₂Cl

Answer: (C)

10.

Which of the following species does not exert a resonance effect?

(A) C₆H₅NH₂

(B) C₆H₅NH₃

(C) C₆H₅OH

(D) C₆H₅Cl

Answer: (B)