Q.1. Which of the following elements is liquid at room temperature ?
(A) Zn
(B) Hg
(C) Cu
(D) Au
Ans :- (B)
Q.2. Most abundant element in earth’s crust is
(A) Si
(B) Al
(C) Zn
(D) Fe
Ans :- (A)
Q.3. Electronic configuration of alkaline earth element is
(A) ns²
(B) ns¹
(C) np⁶
(D) ns⁶
Ans :- (A)
Q.4. Outermost configuration 3d⁴ 4s² k is of
(A) Ca
(B) Zn
(C) Mg
(D) Cu
Ans :-
Q.5. The higest magnetic moment shown by the transition metal ion with the Outermost electronic configuration is
(A) ns²
(B) ns¹
(C) np⁶
(D) ns⁶
Ans :- (A)
Q.6. Shape of d – orbital is
(A) spherical
(B) dumb bell
(C) double dumb bell
(D) none of these
Ans :- (C)
Q.7. Oxidation number of gold metal is
(A) +1
(B) 0
(C) -1
(D) all of these
Ans :- (A)
Q.8. Which of the following is known as red lead ?
(A) Pb₃O₄
(B) Pb₂O₃
(C) PbO
(D) PbO₂
Ans :- (A)
Q.9. Which of the following is not an element of first transition series ?
(A) Iron
(B) Chromium
(C) Magnesium
(D) Nickel
Ans :- (C)
Q.10. Which block of elements are known as transition elements ?
(A) p – block
(B) s – block
(C) d – block
(D) f – block
Ans :- (C)
Q.11. Which one of the following is called green vitriol ?
(A) FeSO₄ . 7H₂O
(B) CuSO₄ . 5H₂O
(C) CaSO₄ . 2H₂O
(D) None of these
Ans :- (A)
Q.12. Which one of the following is diamagnetic ion ?
(A) Co²⁺
(B) Ni²⁺
(C) Cu²⁺
(D) Zn²⁺
Ans :- (D)
Q.13. The general electronic configuration of transition elements is
(A) (n- 1) d⁵
(B) (n – 1) d⁽¹⁻¹⁰⁾ ns¹⁻²
(C) (n – 1) d⁽¹⁻¹⁰⁾ ns¹
(D) none of these
Ans :-(B)
Q.14. The lanthanoid contraction is responsible for the fact that
(A) Zr and Y have about the same radius
(B) Zr and Nb have similar oxidation state
(C) Zr and Hf have about the same radius
(D) Zr and Zn have the same oxidation state
Ans :- (C)
Q.15. Which of the following has maximum number of Unpaired electrons ?
(A) Mg²⁺
(B) Ti³⁺
(C) V³⁺
(D) Fe²⁺
Ans :- (D)
Q.16. CrO₃ dissolves in aqueous NaOH to give
(A) CrO₄²⁻
(B) Cr(OH)₃
(C) Cr₂O₇²⁻
(D) Cr(OH)₂
Ans :- (A)
Q.17. Across the lanthanide series, the basicity of lanthanide hydroxides
(A) increases
(B) decreases
(C) First increases and decreases
(D) does not change
Ans :- (B)
Q.18. Which one of the following ions is a diamagnetic ion ?
(A) Co²⁺
(B) Cu²⁺
(C) Mn²⁺
(D) Sc³⁺
Ans :- (D)
Q.19. The number of Unpaired electrons in Ni²⁺ is
(A) Zero
(B) 2
(C) 4
(D) 8
Ans :- (A)
Q.20. Which of the following is not oxidized by O₃ ?
(A) KI
(B) FeSO₄
(C) KMnO₄
(D) K₂MnO₄
Ans :- (C)
Q.21. Vanadium (III) Oxide is a strong
(A) drying agent
(B) Oxidising agent
(C) reducing agent
(D) melting agent
Ans :- (C)
Q.22. The number of moles of KMnO₄ reduced by one mole of KI in alkaline medium is
(A) One
(B) two
(C) Five
(D) one – fifth
Ans :- (A)
Q.23. Lest paramagnetic property is shown by
(A) Fe
(B) Mn
(C) Ni
(D) Cu
Ans :- (D)
Q.24. The highest magnetic moment is shown by the transition metal ion with the configuration
(A) 3d⁹
(B) 3d⁷
(C) 3d⁵
(D) 3d²
Ans :- (C)
Q.25. Which one of the following nitrates will leave behind a metal on strong heating ?
(A) Copper nitrate
(B) Manganese nitrate
(C) Silver nitrate
(D) Ferric nitrate
Ans :- (D)
Q.26. The purple colour of KMnO₄ is due to
(A) Charge transfer
(B) d -d transition
(C) f – f transition
(D) d – f transition
Ans :- (A)
Q.27. Which of the following has maximum number of Unpaired electrons ?
(A) Mg²⁺
(B) Ti³⁺
(C) V³⁺
(D) Fe²⁺
Ans :- (D)
Q.28. Which do not decolourise KMNO₄ aqueous solution ?
(A) Co₂
(B) HSO⁻₃
(C) CO₃²⁻
(D) SO²⁻₃
Ans :- (C)
Q.29. A reduction in atomic size with increase in atomic number is a characteristic of elements of
(A) d – block
(B) high atomic masses
(C) radioactive series
(D) f – block
Ans :- (D)
Q.30. Lanthanides and actinides resembles in
(A) electron configuration
(B) formation of complexes
(C) ionization energy
(D) oxidation state
Ans :- (A)
Q.31. The constituents of German silver are
(A) Cu, Zn, Ni
(B) Cu, Zn, Sn
(C) Cu, Ni, Mn
(D) None of these
Ans:-
Q.32. Lanthanide contraction observed in
(A) Gd
(B) At
(C) Xe
(D) Ac
Ans :- (A)
Q.33. The 3d block element that exhibits maximum number of oxidation states
(A) Sc
(B) Ti
(C) Mn
(D) Zn
Ans :- (C)
Q.34. How many electrons are involved in the oxidation of KMnO₄ in basic medium ?
(A) 1
(B) 2
(C) 5
(D) 3
Ans :- (D)
Q.35. How many elements in each transition series ?
(A) 10
(B) 8
(C) 14
(D) 18
Ans :- (A)