Which layer of the atmosphere reflects radio waves back to the earth’s surface...? Mcqs

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Which layer of the atmosphere reflects radio waves back to the earth’s surface...?

(A) Troposphere
(B) Stratosphere

(C) Ozone layer
(D) Ionosphere

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Latest MCQs

Which of the following is not the organic bases of DNA...?

(A) Adenine
(B) Cytosine

(C) Thymine
(D) Uracil

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All of these are benefits of bacteria except ______...?

(A) Decomposition
(B) Oxygen Production

(C) Nitrogen Fixation
(D) None of these

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Flowering plants are further divided into how many main types...?

(A) Two
(B) Three

(C) Four
(D) Five

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The orbit of the Earth is an elongated circle is called...?

(A) Ellipse
(B) Parabola

(C) Hyperbola
(D) Oval

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Mohus scale is used for to measure ____________...?

(A) Hardness
(B) Humidity

(C) Pressure
(D) Temperature

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Which of the following is the main characteristic of electromagnets that makes them useful in cranes and doorbells...?

(A) They are very strong
(B) They are permanent

(C) They can be switched on and off
(D) They are very heavy

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Which one of the following represents a chemical change_________...?

(A) Sublimation of iodine
(B) Heating a platinum wire in a Bunsen flame

(C) Heating of mercuric oxide powder
(D) Evaporation of alcohol

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Which one of the following wavelengths of light is most effective in photosynthesis...?

(A) Blue
(B) Green

(C) Orange
(D) Yellow

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Flame test of Copper Halide with bluish-green color identify the presence of ______...?

(A) Halogen
(B) Hydrogen

(C) Copper
(D) B and C

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