Charge carriers in a metal are electrons rather than protons because electrons are...? Mcqs

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Charge carriers in a metal are electrons rather than protons because electrons are...?

(A) Smaller
(B) Negative

(C) Loosely bound
(D) All of the above

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Stability of a racing car is increased by _______...?

(A) Increasing its height
(B) Raising its centre of gravity

(C) Decreasing its width
(D) Lowering its centre of gravity

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Infants (children) should be immunized with BCG (Bacille Calmette-Guerin) vaccines against...?

(A) Malaria
(B) Tuberculosis

(C) Measles
(D) Hepatitis

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Which statement is incorrect about chemical reactions...?

(A) States of matter does not change during chemical reactions
(B) Chemical reactions produce new substances

(C) Chemical reactions occur with the absorption or emission of energy
(D) Chemical reactions may be fast, moderate or slow

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__________ is the lowest layer of the atmosphere....?

(A) Stratosphere
(B) Mesosphere

(C) Troposphere
(D) Thermosphere

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Malaria is a disease which effects the____________...?

(A) Heart
(B) Lungs

(C) Spleen
(D) Kidneys

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When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________...?

(A) Visible
(B) Transparent

(C) Invisible
(D) opaque

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Evaporation from ice and snow is known as___________...?

(A) evaporation
(B) sublimation

(C) hydrogenation
(D) insolation

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How many times the proton is heavier than an electron...?

(A) 1030
(B) 1205

(C) 1650
(D) 1836

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The phenomenon of dispersion light can be observed experimentally by passing a white light through ____...?

(A) Lens
(B) Prism

(C) Mirror
(D) Grating

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