Question

Q18. Read the following and answer any four questions from 18 (i) to 18 (v).

Element

A

B

с

D

E

Atomic number

11

13

19

20

17


Electronic configuration

2,8,1

2,8,3

2,8,8,1

2.8.8.2

2,8,7


18(1). Write the increasing order of elements A, C, D on the basis of their metallic

character. (a) D<C<A

(b) C<D<A

(c) A<D<C

(D)D<A<C

18(1). Which element can form amphoteric oxide?

(a)None

(b) B

(C) E

(D) D

18(ii). Which of the following statement is correct about 'A?


(i) It is highly reactive. (i) It is immersed in kerosene to prevent reactivity in atmosphere.

(iii) It is metallic in nature.

(iv) It have high value of electronegativity.

(a) (i).(ii)

(b) (i).(ii),(iv)

(C) (i).(ii),(iii)

(D) only (ii)

18(iv). Which of the following statement is correct?

(a) B is noble gas.

(B) c have valency -1

(c) D is metallic in nature.

(d) a belong to P block


18(v). Which of the following pair belong to same period ?

(a) A.BE

(b) A.B.C.D

(c) A.D

(d) D.E​

Answer 1

Explanation:

sorrry i dont the answer of this question