According to World Health Organization (WHO), the industrial limit of sound in the industries must be...? Mcqs

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According to World Health Organization (WHO), the industrial limit of sound in the industries must be...?

(A) 80 dB
(B) 75 dB

(C) 85 dB
(D) 100 dB

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When a parallel beam of light rays strikes a smooth surface like mirrors, it will be reflected as parallel rays of light is called...?

(A) Irregular Reflection
(B) Specular Reflection

(C) Diffused Reflection
(D) Scattered Reflection

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Water waves pass from deep into the shallow region and are then refracted. The characteristics of waves which will remain constant is _____...?

(A) Direction
(B) Frequency

(C) Speed
(D) Wavelength

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Sound travels slowest in which one of the following...?

(A) Air
(B) Water

(C) Steel
(D) Diamond

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The life cycle of butterfly is...?

(A) Eggs→caterpillar→pupa→butterfly
(B) Eggs→pupa→caterpillar→butterfly

(C) Eggs→butterfly→caterpillar→pupa
(D) Eggs→caterpillar→butterfly→pupa

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Vitamin A is found in the____________...?

(A) Green vegetables
(B) white vegetables

(C) Yellow vegetables
(D) Red vegetables

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What do friction forces between the air and a moving object cause...?

(A) Speed increase
(B) Weight decrease

(C) Resistance
(D) Energy gain

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What is the name of the central part of the earth...?

(A) Mantle
(B) Core

(C) Crust
(D) None of the above

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The melting point of Ice on Fahrenheit Scale is taken as _____...?

(A) 32°F
(B) 0°F

(C) 212°F
(D) None of these

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Which of the following equations represents a addition reaction...?

(A) AB → A+B
(B) A → AB

(C) A+B → AB
(D) AB → A+C

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