300+ TOP MCQs on D and F Block Elements and Answers

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry D and F Block Elements Multiple Choice Questions

MCQs on D and F Block Elements :

1. The number of unpaired electrons in gaseous species of Mn³⁺, Cr³⁺ and V³⁺ respectively are:
(A) 4, 4 and 2
(B) 3, 3 and 2
(C) 4, 3 and 2
(D) 3, 3 and 3

Answer

Answer: (c)

2. Gun metal is an alloy of:
(A) Cu and Al
(B) Cu and Sn
(C) Cu, Zn and Sn
(D) Cu, Zn and Ni

Answer

Answer: (c)

3. Which one of the following elements shows the maximum number of different oxidation states in its compounds?
(A) Eu
(B) La
(C) Cd
(D) Am

Answer

Answer: (d)

4. When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved is
(A) sulphur dioxide
(B) ammonia
(C) carbon monoxide
(D) carbon dioxide

Answer

Answer: (c)

5. Zinc and mercury do not show variable valency like d-block elements because
(A) they are soft
(B) their d-shells are complete
(C) they have only two electrons in the outermost subshell.
(D) their d-shells are incomplete

Answer

Answer: (b)

6. Which of the following products are obtained when Na₂CO₃ is added to a solution of copper sulphate?
(A) Basic copper carbonate , sodium sulphate and CO₂
(B) Copper hydroxide, sodium sulphate and CO₂
(C) Copper carbonate, sodium sulphate and CO₂
(D) Copper carbonate and sodium sulphate

Answer

Answer: (d)

7. The pair that has similar atomic radii is
(A) Mn and Re
(B) Ti and Hf
(C) Sc and Ni
(D) Mo and W

Answer

Answer: (d)

8. Silver nitrate produces a black stain on the skin due to
(A) being a strong reducing agent
(B) its corrosive action
(C) formation of complex compound
(D) its reduction to metallic silver

Answer

Answer: (d)

9. According to IUPAC nomenclature sodium nitroprusside dihydrate is named as
(A) Sodium pentacyanonitrosylferrate (III)
(B) Sodium nitroferrocyanide
(C) Sodium nitroferricyanide
(D) Sodium pentacyanonitrosylferrate (II)

Answer

Answer: (a)

10. In Fe(CO)₅, the Fe-C bond possesses:
(A) ionic character
(B) sigma character only
(C) pi character
(D) both sigma and pi characters

Answer

Answer: (d)