Question

Q. Select the correct option and write only the alphabet
corresponding to the correct option:
(1) Zine reacts with HCI. The reaction is a...reaction. (Ch.3)
A) combination
(B) decomposition
(C) displacement
(D) double
(2) Intensity of magnetic field is expressed in. (Ch. 4)
A) ampere (B) volt (C) coulomb (D) oersted
If the speed of light in a medium is 2.5 10 m/s, its absolute
refractive index
(c = 3 10 m/s) (Ch. 6)
2.5
(B) 1.1 (C) 1.3 (D) 1.2
(4
1) A solution of Cuso, in water is in colour. (Ch. 8)
(4) pink (B) blue (C) colourless (D) green
5) When acetic acid reacts with sodium metal
was is formed
(Ch. 9
(A) ogen (B) hydrogen (C) chlorine (D) nitrogen
​

Answer 1

Answer:

1- (C) displacement

2- (D) oersted

3)- ....

4)- (B) blue

5) (B) hydrogen

Explanation:

I dont know the third problem...