d & f block element

01. Which of the following is diamagnetic?

(a) Cr³⁺

(b) Sc³⁺

(c) V²⁺

(d) Ti³⁺

Ans:-b

2. How many oxygen atoms are each chromium attached to in K₂Cr₂O₇.

(a) 4

(b) 6

(c) 2

(d) 3

Ans B

3. Which of the following is paramagnetic?

(a) Cu⁺⁺

(b) Zn⁺⁺

(c) Ag⁺⁺

(b) Au⁺

Ans:-a

4. Who among the following is Redlead?

(a)Pb₃O₄ (b) PbO (c) Pb₂O₃ (d) PbO₂

Ans A

5. Transition is the general electronic configuration of the elements.

(a) (n-1)d^1-10s^1-2

(b) (n-1)d⁵s²

(c) (n-1)d^1-5s⁰

(d) none of these

Ans A

6 Which of the following is an alkaline earth element?

(a) C

(b) Zn

(c) Na

(d) Fe

Ans B

7 The elements of which group are called transition elements.

(a) p-block

(b) d-block

(c) s-block

(d) F-block

Ans B

8 Which of the following is a parauranic element?

(a) Pr

(b) Pm

(c) Pu

(d) P

Ans:-C