Question

3. Choose the correct alternate :
(1) The pH value of water is-
(a) less then 7

(b) 7,
(c) more than 7,
(d) none of these
(ii) The valency of carbon is-
(a) 1.
(b) 2.
(c) 3.
4.
(iii) The number of periods in periodic table is
(a) 4.
(b) 6,
(d) 8.
(iv) The S.l. unit of electric current is -
(a) joule,
(b) watt
(c) volt,
f) ampere.
(y) The device which converts clectric energy into mechanica
(electric motor,
(b) electric generator
(c) arnmeler
(d) voitmieter​

Answer 1

7

4

8

ampere

electric generator

Answer 2

1)The pH value of water is 7

2)The valency of carbon is 4

3)The number of periods in periodic table is 7

4)The S.l. unit of electric current is ampere

5)A device which converts electrical energy into mechanical energy is called an electrical motor.