21.
Insulin is a/an
Answer : B. therapeutic product
22.
The first known metal to man is
Answer : B. Copper
23.
Formation of red blood cells in a normal human adult occurs in
Answer : C. bone marrow
24.
The melting point of silver is
Answer : C. 961°C
25.
18 ct contains ________ % weight of gold
Answer : B. 75
26.
The cube root of 512 is
Answer : B. 8
27.
The First President of India was
Answer : A. Dr. Rajendra Prasad
28.
The main aim of non-co-operation movement was
Answer : D. to attain Swaraj
29.
Bauxite is an ore of
Answer : A. Aluminium
30.
The headquarters of World Trade Organisation is at
Answer : B. Geneva