Science and Technology

Science and Technology

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Science and Technology

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Question # 1

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

Question # 2

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

Question # 3

The rays which are liberated from metal due to collision of fast moving electrons:

Question # 4

The number of hydrogen isotopes;

Question # 5

Frequency of ultrasound is.

Question # 6

Which radiation have zero mass number

Question # 7

----------------- rays are used to detect the flaws and crocks of metal parts.

Question # 8

The light of laser is:

Question # 9

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

Question # 10

the test that measures the electrical activity of the heart:

Question # 11

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

Question # 12

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

Question # 13

Recording of electrical activity of brain is said to be:

Question # 14

What discovered radioactivity?

Question # 15

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

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10th Class (English Medium) General Science Important MCQ's

Sr.# Question Answer
1 Element having atomic numebr greater than.......... go on emitting radiations.
A. 80
B. 92
C. 82
D. 83
2 The principal of light on whihc the fibre optics works is.
A. Reflection
B. Refraction
C. Total internal reflection
D. Dispersion
3 The number of hydrogen isotopes;
A. 3
B. 2
C. 8
D. 10
4 Which type of rays are used in the solar system fitted on ships and submarines to find the hidden secrets under water:
A. x - rays
B. C.T Scan
C. Ultrasound
D. Light
5 Radioactivity occurs naturally from all the elecments with atomic number greater than.
A. 62
B. 72
C. 80
D. 82
6 When a ray of light passes from a denser to a rare medium it;
A. bends away form the normal to the interface
B. bends towards the normal
C. does no bend
D. non of the above
7 The Phenomenon of emission of radiations from radioactive elements is called:
A. Doping 
B. Allotropy 
C. Radioactivity
D. Induction 
8 Which radiation have zero mass number
A. Alpha radiation
B. Beta ratiation
C. Gamma radiation
D. None of these
9 Laser is used toproduce three -Dimensional image called.
A. Holograms
B. Holography
C. Lithotropsy
D. Radioactive elements
10 The light of laser is:
A. monochromatic 
B. dichromatic 
C. trichromatic 
D. Tetrachrmatic 

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