Question # 1

Which of the following is a natural fiber:

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Teflon

Cotton

Acrylic

Nylon

Phosphorous.... and sulphur 35 are employed on living system to trace metabolic path.

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31

30

38

32

Radioactivity occurs naturally from all the elecments with atomic number greater than.

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62

72

80

82

During the preparation of the juice of sugarcane is heated from:

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100°C to 110°C

100° to 120°

100°C to 130°C

100°C to 140°C

Which radiation have zero mass number

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Alpha radiation

Beta ratiation

Gamma radiation

None of these

Element having atomic numebr greater than.......... go on emitting radiations.

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80

92

82

83

Frequency of ultrasound is.

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Less than 20 Hz

20 KHz

30 KHz

More than 20 khn

In engineering department besides heavy machinery the role of ....... industry is examplary.

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Cottage

Steel

Electrical

Paper

When a ray of light passes from a denser to a rare medium it;

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bends away form the normal to the interface

bends towards the normal

does no bend

non of the above

The Phenomenon of emission of radiations from radioactive elements is called:

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Doping

Allotropy

Radioactivity

Induction

If we increasing angle of incidence then at a particular angle incidence the angel of refraction is.

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45 ^o

60 ^o

30 ^o

90 ^o

Recording of electrical activity of brain is said to be:

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ultrasound

MRI

E.E.G

E.C.G

Laser is used toproduce three -Dimensional image called.

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Holograms

Holography

Lithotropsy

Radioactive elements

Which type of rays are used in the solar system fitted on ships and submarines to find the hidden secrets under water:

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x - rays

C.T Scan

Ultrasound

Light

Emission of ratiations from nucleus is said to be

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Chemical reaction

Atomic reaction

Radioactivity

Nuclear fission

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