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Question-1
The atom which provides an electron pair is called as the

(A) Donor atom	(B) Acceptor atom
(C) Shared atom	(D) Bonded atom

Question-2
Who invented 'neutrons'?

(A) Rutherford	(B) Chadwick
(C) Goldstein	(D) J.J.Thomson

Question-3
Atoms on losing or gaining electrons give electrically charged particles called

(A) Ions	(B) protons
(C) neutrons	(D) positrons

Question-4
Covalent compounds have

(A) High melting and boiling point	(B) Non-conducting nature
(C) Soluble in water	(D) High rate of reaction

Question-5
During chemical reactions, atoms of all elements except hydrogen tend to acheive eight electrons in their outermost shell known as

(A) octet rule	(B) doublet rule
(C) triplet rule	(D) quartet rule

Question-6
Who discovered Radioactivity?

(A) Becquerel	(B) Rutherford
(C) Marie curie	(D) Pierre curie

Question-7
The maximum number of electrons which can be accomodated in k shell is

(A) 2	(B) 8
(C) 18	(D) 32

Question-8
Atoms of all elements are

(A) Neutral	(B) Positively charged
(C) Negatively charged	(D) Same

Question-9
Which of an element are made up of the atoms of the same type?

(A) Molecules	(B) Compounds
(C) Matter	(D) Ions

Question-10
The covalent bond formed by mutual sharing of two pairs of electrons between the two atoms is called a

(A) Single covalent bond	(B) Double covalent bond(double bond)
(C) Triple covalent bond	(D) Ionic bond

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Std 8

ICSE/ISC

Practice in Related Chapters
Hydrogen
Structure of Atom
Transformation of Substances
Metals and nonmetals
Carbon and its Compounds