The luster of diamond is due to_________...? Mcqs

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The luster of diamond is due to_________...?

(A) Reflection
(B) Total internal reflection

(C) Refraction
(D) None of these

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Short sightedness is due to__________...?

(A) Shifting of the iris
(B) Elongation of eyeballs

(C) Weakening of the retina
(D) Weaker muscles

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Geiger-Muller counter is used to detect__________...?

(A) Protons
(B) Neutrons

(C) Photons
(D) none

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Stars in the sky appear to twinkle due to _________...?

(A) a series of refractions
(B) a series of reflections

(C) a surface tension phenomenon
(D) multiple diminishing brightness

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Soap and detergents remove the dirt from clothes due to__________...?

(A) Osmosis
(B) Capillary action

(C) Lowering of interfacial tension
(D) Diffusion

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The color of blood is red due to __________...?

(A) Haemoglobin
(B) Neutrophils

(C) Esinophils
(D) Hematocrit

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Main use of salt in diet is to : ___________...?

(A) ease the process of cooking
(B) increase the taste

(C) produce small amount of hydrochloric acid required for digestion
(D) inclease solubility of food particles in water

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The increasing vapor pressure caused by heating a liquid is due to___________...?

(A) increase inter-molecular interactions
(B) increasing potential energy of molecules

(C) increasing kinetic energy of molecules
(D) decreasing surface tension

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The primary function of the feathers in birds is to _________...?

(A) Provide insulation for preserving body heat
(B) Provide striking surface to the wings for flying

(C) Make the body surface waterproof
(D) impart coloration for species as well as sex recognition

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The blue colour of clear sky is due to_______________...?

(A) Reflection of light
(B) Refraction of light

(C) Diffraction of light
(D) Dispersion of light

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Bauxite is an ore of_________...?

(A) copper
(B) zinc

(C) aluminium
(D) iron

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Red color of tomato is due to___________...?

(A) Anthocyanin
(B) Xanthophyll’s

(C) Lycopene
(D) None of these

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All matter is made of ___________...?

(A) Air
(B) Water

(C) Vibrations
(D) Atoms

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The shape of the external ear is due to____________...?

(A) Elastic cartilage
(B) Fibrocartilage

(C) Articular cartilage
(D) none

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Atmospheric temperature increases at the higher altitudes due to________...?

(A) Conduction
(B) Convection

(C) Inversion
(D) Radiation

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The blueness of the sky is mainly due to _____________...?

(A) The scattering of sunlight by air molecules
(B) The presence of water vapor

(C) Absorption of blue light by the air
(D) Emission of blue light by the atmosphere

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Fuse wire is made of_____________...?

(A) 63% tin and 37% lead
(B) 63% lead and 37% tin

(C) 63% tin and 37% aluminum
(D) 63% lead and 37% aluminum

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Honey contain glucose and fructose along with some other ingredients, it has greater viscosity due to____________...?

(A) hydrogen bonding
(B) irregular shape of the molecules

(C) irregular shape of the molecules and strong inter-molecular forces
(D) greater molecular size

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Heating element of an electric heater is made up of___________...?

(A) Tungsten
(B) Graphite

(C) Chromium
(D) Nichrome

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Water soluble Vitamins are _________...?

(A) A & D vitamins
(B) B & C vitamins

(C) A & K vitamins
(D) B & K vitamins

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The distance between the earth and the sun is smallest in the month of _________...?

(A) February
(B) January

(C) December
(D) April

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The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________...?

(A) The hair barging against the charged comb
(B) Small electric sparks

(C) The rubbing of the comb with the hair
(D) None of the above

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