Comets are made mostly of ice and dust. As comets get close to the sun, they start to “melt” and release what...? Mcqs

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Comets are made mostly of ice and dust. As comets get close to the sun, they start to “melt” and release what...?

(A) Steam and dust
(B) Gas and dust

(C) Steam, gas and dust
(D) None of the above

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lightest metal is__________...?

(A) Lithium
(B) Sodium

(C) Magnesium
(D) Aluminium

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Maximum biological damage is caused by ____________...?

(A) Gamma rays
(B) Alpha rays

(C) Beta rays
(D) Microwaves

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Which among the following is manned spacecraft that took the humans to the moon...?

(A) Apollo-15
(B) Apollo-16

(C) Apollo-17
(D) Apollo-18

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Which planet looks reddish in the night sky ...?

(A) Jupiter
(B) Saturn

(C) Mars
(D) MercurY

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Reflex actions in head region are under the control of___________...?

(A) Brain
(B) Spinal cord

(C) both a & b
(D) non of the above

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Which of the following is liquid fuel ...?

(A) Patrol
(B) Kerosene

(C) Paraffin oil
(D) All of above

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Which statement is incorrect about suspension...?

(A) The suspension is heterogeneous mixture
(B) In a suspension the particles of solute are dispersed

(C) The colour and appearance are not same in every part of the suspension
(D) The suspension is transparent and clear

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What occurs when light bounces off a shiny surface...?

(A) Refraction
(B) Diffraction

(C) Reflection
(D) Absorption

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The Empirical formula of hydrogen peroxide is _______...?

(A) H2O2
(B) HO

(C) OH
(D) O2H2

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