Choose the correct answer. (A) Total charge present in the universe is constant. (B) Total positive charge present in the universe is constant.

Correct Answer - `35%`

D) 1 – d, 2 – c, 3 – b, 4 – a

The correct option is  (D)

Molecular mass of water is 18 gram, that means the number of molecules in 18 gram of water is 6.02 × 1023 ∴ Number of molecules in l gm of water...

C) a is true, b is false

(B) radially outward, radially inward

1. A) Adrenalin 2. B) Adrenal gland

Correct Answer - ab