IGCSE Cambridge Secondary Grade 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
A hydrogen atom minus an electron forms

(A) Neutron	(B) Electron
(C) Proton	(D) Positron

Question-2
Which radiations cause maximum ionization?

(A) α radiations	(B) β radiations
(C) γ radiations	(D) Infrared radiations

Question-3
Atoms which have the same number of protons but different numbers of neutrons as that of the element are called its

(A) Nuclides	(B) Isobars
(C) Isotopes	(D) Positrons

Question-4
Subatomic particles with the same mass as that of electrons but with opposite ( positive) charge are called

(A) Isobars	(B) Nuclides
(C) Positrons	(D) Isotopes

Question-5
All radioactive substances should be put in

(A) Metal containers	(B) Lead containers
(C) Carbon containers	(D) Clary containers

Question-6
Which of the following is used to flow electric current in vacuum?

(A) Radioactivity	(B) Conductivity
(C) Thermionic emission	(D) Convection

Question-7
Protons and neutrons together in the nucleus form

(A) Positron	(B) Electron
(C) Nucleons	(D) α particles

Question-8
Controlled exposure of which radiations is used on the treatment of cancer?

(A) α radiations	(B) β Radiations
(C) γ Radiations	(D) U – V radiations

Question-9
Which type of harmful radiations are emitted by nuclear wastes.

(A) α radiations	(B) β radiations
(C) γ radiations	(D) Beta and gamma radiations

Question-10
Which of the following is a method to find the age of an animal or plant fossil?

(A) Isotopes	(B) Isobars
(C) Carbon dating	(D) Radioactivity

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Cambridge Secondary Grade 9

IGCSE

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