Cooking vessels have wooden or bakelite handles because–
(A) the handle must be strong
(B) wood and bakelite are bad conductors of heat
(C) the handle should be attractive
(D) None of the above
The rolling ball stops itself after rolling away for some reason, which of the following reasons?
(A) Frictional force
(B) gravity
(C) Inertia
(D) None of the above
Which gas is used to purify pond water in cities?
(A) Sulfur dioxide
(B) Chlorine
(C) Nitrogen
(D) Ammonia
Malnutrition leads to lack of which?
(A) Vitamin 'A'
(B) Carbohydrate
(C) Vitamin 'C'
(D) Protein
Image are formed between two parallel mirrors?
(A) 2
(B) 4
(C) 8
(D) Eternal
Any moving body on earth comes to rest due to the following reason?
(A) Due to inertial law
(B) due to friction force
(C) Due to momentum conservation
(D) due to the force of gravity
Which of the following physical properties is not affected by quantity?
(A) Volume
(B) mass
(C) weight
(D) density
Mac number is related
(A) At the speed of sound
(B) At the speed of the ship
(C) At the speed of the plane
(D) At the speed of the spacecraft
Nichrome metal element is used in electric heaters, because?
(A) It has high resistivity
(B) Its melting point is high
(C) More powerful current can be flow in it
(D) For all the above reasons
Which metal has the highest melting point?
(A) Osmium
(B) Tungsten
(C) Molybdenum
(D) aluminum
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