100 Science Questions and Answers for RRB NTPC
The coil in a heater is made of
(A) Nichrome
(B) Tungsten
(C) Copper
(D) Iron
Correct Answer : A
Thin wires can be pulled from a metal piece. For which property of the metal is it responsible?
(A) Tensile
(B) hardness
(C) Malignancy
(D) conductivity
Correct Answer : A
In which process is a protective zinc coating applied on iron to prevent it from rusting?
(A) Galvanisation
(B) Annealing
(C) Smelting
(D) Welding
Correct Answer : A
In which of the following classifications are the elements arranged in the order of their increasing atomic number?
(A) The Modern Periodic Table
(B) Mendeleev's Periodic Table/
(C) Newland's Law of Octaves
(D) Dobereiner's Triads
Correct Answer : A
Halogens are belonging to:
(A) Group17
(B) Group 8
(C) Group 18
(D) Group 7
Correct Answer : A
Which of the below allotropes of carbon is in the form of geodesic globe?
(A) Fullerene
(B) Carbon nanotube
(C) Graphite
(D) Diamond
Correct Answer : A
During uniform motion of an object along a straight line, its ___________ remains constant with time.
(A) acceleration
(B) velocity
(C) force
(D) deceleration
Correct Answer : B
.______ is least reactive element belonging to group 17.
(A) Bromine
(B) Iodine
(C) Chlorine
(D) Fluorine
Correct Answer : B
The catalyst is a substance through which the rates of chemical reactions ________.
(A) Decreases
(B) Changes
(C) Increases
(D) None of these
Correct Answer : C
Which of the following has low density and low melting point?
(A) Na
(B) Fe
(C) Cu
(D) Au
Correct Answer : A
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