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

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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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Heat of sun reaches the earth by ___________...?

(A) Convection
(B) radiation

(C) Conduction
(D) None of these

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Symbol of Iron is__________...?

(A) Na
(B) Fr

(C) Fe
(D) Zn

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Male birds are ________ colorful than female birds....?

(A) Less
(B) More

(C) Equal
(D) None of these

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Elements are made of _________...?

(A) Atoms
(B) Molecules

(C) H2O
(D) Compounds

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Carbon dioxide dissolution in water, actually represents solute and solvent combination of _____...?

(A) Liquid-liquid solution
(B) Solid-liquid solution

(C) Gas-liquid solution
(D) Solid-solid solution

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Which metal known as quick silver ...?

(A) Mercury
(B) Sulphuric acid

(C) Chromite
(D) Quartz

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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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The unit of Kc for reaction N2 + O2 ⇌ 2NO...?

(A) mol dm^-3
(B) mol^-2 dm^6

(C) mol^-1dm3
(D) No unit

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what kind of soil is treated with gypsum to make it suitable for cropping______...?

(A) Alkaline
(B) Acidic

(C) Waterlogged
(D) Soil with excessive clay content

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