Quartz crystal in quartz watches work on the principle called...? Mcqs

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Quartz crystal in quartz watches work on the principle called...?

(A) Photoelectric effect
(B) Stark effect

(C) Thermionic effect
(D) Piezo-electric effect

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Which is the useful product for plants...?

(A) Oxygen
(B) Water

(C) Glucose
(D) Carbon Dioxide

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Which of the following is cold current ...?

(A) Gulf Stream
(B) Brazil

(C) Benguela
(D) Kuroshio

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The electric field can be detect ______...?

(A) Photon
(B) Neutron

(C) Proton
(D) Electron

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The amount of solid waste or concentration of gases other than oxygen increase in atmosphere is called...?

(A) Air pollution
(B) Ozone depletion

(C) Acid rain
(D) Greenhouse effect

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For an object to escape from the surface of a celestial body, the kinetic energy of the object must be: __________...?

(A) Less than the gravitational potential energy of the body
(B) Equal to the gravitational potential energy of the body

(C) Greater than the gravitational potential energy of the body
(D) None of the above

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Air contains volume of carbon dioxide approximately...?

(A) 3%
(B) 33%

(C) 0.3%
(D) 0.03%

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Which of the following is the form of marble...?

(A) Onyx
(B) Carrara

(C) Calacatta
(D) All of these

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Chemical name of vinegar is _____________...?

(A) Sodium Nitrate
(B) Dilute acetic acid

(C) Chloride of lime
(D) Calcium

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Which blood cells are called ‘Soldiers’ of the body ...?

(A) WBC
(B) Platelets

(C) RBC
(D) All of the above

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