Sound travels_______ in solid materials then liquid...? Mcqs

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Sound travels_______ in solid materials then liquid...?

(A) Constant
(B) Slowest

(C) Fastest
(D) None of these

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When water is filled in a bottle and is allowed to freeze, the bottle breaks because...?

(A) Water expands on freezing
(B) Bottle contracts at freezing point

(C) temperature outside the bottle is less than that inside the bottle.
(D) None of the above

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_________ contains ozone layer....?

(A) Thermosphere
(B) Exosphere

(C) Lithosphere
(D) Stratosphere

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The audible range of normal human ear is ____...?

(A) 16 Hz to 20kHz
(B) 10 Hz to 31kHz

(C) 67 Hz to 45kHz
(D) 20 Hz to 20kHz

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What is the wavelength of visible spectrum:...?

(A) 1300-3000A
(B) 3900-7600A

(C) 7800-8000A
(D) None of these

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The large plates of solar pannels are painted...?

(A) Red
(B) White

(C) Yellow
(D) Black

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Barcode reader is a device ____...?

(A) Input
(B) Output

(C) Display
(D) Storage

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Coke is made by heating coal in the absence of air at__________...?

(A) 700 °C
(B) 900 °C

(C) 1300 °C
(D) 1700 °C

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The human eye acts like a ______...?

(A) Camera
(B) Telescope

(C) Projector
(D) Microscope

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‘ELISA’ test is employed to diagnose...?

(A) Corona virus
(B) AIDS antibodies

(C) Tuberculosis bacterium
(D) Cancer

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