Water covers __________ of the Earth’s surface...? Mcqs

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Water covers __________ of the Earth’s surface...?

(A) 61%
(B) 67%

(C) 71%
(D) 76%

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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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Corrosive effect on skin is caused by ______...?

(A) Acid
(B) Base

(C) Salt
(D) Both a & b

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Which of the following is helpful for removal of permanent hardness...?

(A) Na2CO3
(B) Ca(OH)2

(C) CaCO2
(D) Na2SO4

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Sputnik-1 was the first manmade spacecraft, which was launched on October 4, 1957 by the ____...?

(A) Soviet Union
(B) United States of America

(C) China
(D) Great Britain

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the delicate lungs are protected by a cage that is called ______...?

(A) luvcage
(B) Ribcage

(C) both A & B
(D) None of these

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In data organization, which method is mostly useful...?

(A) Table
(B) Graph

(C) Ratio
(D) Both a and b

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Which thing resists between shoes and earth...?

(A) Rolling
(B) Friction

(C) Fluid
(D) sliding

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The volume of air remaining in the lungs even after forcible expiration is:...?

(A) total volume
(B) tidal volume

(C) residual volume
(D) none of the above

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Which of the following is a mammal...?

(A) Ostrich
(B) Crocodile

(C) Platypus
(D) Duck

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