11) Milk is unique in its nutritive value.However,it is a poor source of
a) calcium
b) iron
c) copper
d) sodium
12) Which one among the given hormones is jocularly termed as a ‘’jack-of-all-trade’’?
a) Prolactin
b) Renin
c) Thyroxine
d) Parathormone
13) Which one among the following metals is used in fireworks to make a brilliant white light?
a) Sodium
b) Magnesium
c) Aluminium
d) Silver
14) Which one among the following agents is added to domestic LPG cylinder to help in the detection of gas leakage?
a) Methanol
b) Ethanol
c) Thioethanol
d) Chloroform
15)Which one of the following is the important ore magnesium?
a) Cassiterite
b) Malachite
c) Carnalite
d) Galena
16) Which one of the following planets is said to be ‘’twin sister’’ of the Earth?
a) Mercury
b) Venus
c) Mars
d) Jupiter
17) A perfect black body has the unique characteristic feature as
a) a good absorber only
b) a good radiator only
c) a good absorber and a good radiator
d) Neither an absorber nor radiator
18) Cavitation is a special application property exhibited only by
a) audible sound
b) infrasonic
c) ultrasonic
d) electromagnetic waves
19) Why laser is used in the pipe alignment?
a) They are directional in nature
b) They are coherent
c) They are monochromatic
d) None of the above
20) Which one of the following common devices works on the basis of the principle of mutual induction?
a) Tubelight
b) Transformer
c) LED
d) Photodiode