Ozone layer protects the Earth from __________ radiations from the Sun....? Mcqs

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Ozone layer protects the Earth from __________ radiations from the Sun....?

(A) microwaves
(B) infrared

(C) X-rays
(D) ultraviolet

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Which gas was discovered on the sun about 151 years ago during total solar eclipse...?

(A) Hydrogen
(B) Helium

(C) Nitrogen
(D) Flourine

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Total internal reflection of light is possible when light enters from ____...?

(A) Air to water
(B) Glass to glass

(C) Water to air
(D) Air to glass

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An egg sinks in soft water but floats in a concentrated solution of salt because...?

(A) egg absorbs salt from the solution and expands
(B) albumin dissolves in salt solution and egg becomes lighter

(C) the density of salt solution exceeds the density of eggs
(D) water has high surface tension

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When light strikes an opaque object, the light is blocked, thus a ________ is formed on the opposite side of the object....?

(A) Reflection
(B) Refraction

(C) Image
(D) Shadow

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A lake starts freezing because of the cold atmosphere. It will first freeze...?

(A) At the bottom
(B) ln the middle pan

(C) At the top surface
(D) Uniformly throughout the water body

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Most asteroids orbit the sun in a region called the asteroid belt between...?

(A) Mars and Jupiter
(B) Jupiter and Saturn

(C) Mercury and Neptune
(D) Venus and Uranus

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The distance b/w Earth and Moon is___________...?

(A) 3,50,000km
(B) 3,60,100km

(C) 3,72,000km
(D) 3,84,400km

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A Rhinoscope (or Nasoscope) is a thin, tube-like instrument used to examine the inside of the_____...?

(A) Eyes
(B) Nose

(C) Ears
(D) Brains

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Radio labeling and carbon dating also show some uses of radioactive isotopes in determining the ____ of fossils....?

(A) Size
(B) Age

(C) Shape
(D) Color

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