Everyday Science MCQs

Page No. 103

Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere?


aCarbon dioxide

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bChlorofluorocarbons

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cNitrogen oxides

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dMethane

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View Answer Chlorofluorocarbons

Fuse wire is made of_____________?


a63% tin and 37% lead

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b63% lead and 37% tin

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c63% tin and 37% aluminum

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d63% lead and 37% aluminum

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View Answer 63% tin and 37% lead

The approximate intensity level of the sound which can cause damage to the ear drum is?


a20 dB

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b60 dB

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c100 dB

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d160 dB

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View Answer 100 dB

What is the smallest unit of heredity?


aChromosomes

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bGene

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cNucleotides

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dnone

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View Answer Gene

When a patient’s immune system becomes reactive to a drug, this is an example of?


aSuper infection

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bDrug resistance

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cAllergy

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dnone

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View Answer Allergy

The shape of the external ear is due to____________?


aElastic cartilage

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bFibrocartilage

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cArticular cartilage

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dnone

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View Answer Elastic cartilage

Which of these is not a region of the spinal cord?


aThoracic

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bPelvic

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cLumbar

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dnone

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View Answer Pelvic

The damage to the_________nerve could result in the defect of the eye movement:


aOptic

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bTrigeminal

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cAbducens

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dnone

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View Answer Abducens

The autonomic nervous system innervates all of these except?


aCardiac muscles

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bSkeletal muscles

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cSmooth muscles

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dnone

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View Answer Skeletal muscles

Serum if blood plasma minus its?


aCalcium ions

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bClotting proteins

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cGlobulin

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dnone

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View Answer Clotting proteins

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