The study of organisms and their environment is known as ________...? Mcqs

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The study of organisms and their environment is known as ________...?

(A) Acoustics
(B) Ecology

(C) Ichthyology
(D) None of these

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Permanent hardness of water can be removed by adding __________...?

(A) Chlorine
(B) Washing soda

(C) Bleaching powder
(D) None of these

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Potassium nitrate is used in__________...?

(A) Medicine
(B) Fertilizer

(C) Salt
(D) Glass

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Animals with backbone are called...?

(A) Vertebrates
(B) Invertebrates

(C) Both A and B
(D) None

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Weight is the pull of _____ that acts on the mass of an object....?

(A) Stars
(B) Magnet

(C) Gravity
(D) Electrostatic force

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Deficiency of Vitamin-D results in __________...?

(A) night blindness
(B) rickets

(C) scurvy
(D) hair fall

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Butter paper is _________ material because it scatters light....?

(A) Transparent
(B) Translucent

(C) Opaque
(D) None

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A narrow beam of white light passes from air into the glass and is refracted. The wave characteristic remains unchanged in its ______...?

(A) Direction
(B) Speed

(C) Frequency
(D) Wavelength

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The general formula for alkanes is _____...?

(A) CnH2n
(B) CnH2n+1

(C) CnH2n+2
(D) CnH2n-1

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What is the effect of height increase over temperature...?

(A) Temperature increase
(B) Temperature decrease

(C) Remains constant
(D) None

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