(a) Long bone
Pneumoconiosis affects the workers who work mainly in
(a) Glass industry
(d) Coal mining industry
Physico-chemical characteristics of water in water sources undergo change due to
(c) Aquatic fungi
(d) Aquatic macrophytes
Which one of the following fuels causes minimum environmental pollution?
Which one of the following does a TV remote control unit use to operate a TV set?
(a) Radio waves
(c) Light waves
(d) Sound waves
Which one of the following is a vector quantity?
An air bubble in water will act like a
(a) Concave mirror
(b) Cancave lens
(c) Convex mirror
(d) Convex lens
Optical fibre works on the principle of
(d) Total internal reflection
Which one of the following places did Kunwar Singh, a prominent leader of the Revolt of 1857 belong to
(a) Uttar Pradesh
(c) Madhya Pradesh
Which of the following ethnic elements is not evidenced for in the skelatal remains of Harappan sites?