Author:
Lenses which is used in photography is?
(A) Plastic lenses
(B) Concave lenses
(C) Convex lenses
(D) None of the above
Blood enters the lungs from which chamber of the heart?
(A) Right ventricle
(B) Left atrium
(C) Left ventricle
(D) Right atrium
What structure connects the stomach and the mouth?
(A) Hepatic duct
(B) Esophagus
(C) Spinal column
(D) Trachea
Parsec is a unit of?
(A) Force
(B) Sound Pressure
(C) Astronomical length
(D) Power Unit
Which material is the best absorber of infra-red radiation?
(A) Cotton
(B) Wood
(C) Animal Fur
(D) Glass
Which of the following is not a compound of calcium?
(A) Chalk
(B) Marble
(C) Silicon
(D) Gypsum
Alloys in which mercury is one of the metals are called?
(A) Mixtures
(B) Solders
(C) Emulsions
(D) Amalgams