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Chemistry - 9 Chapter - 5
Chemical Bonding
Test - 13
1.
a polar molecule in the following is:
a) Br
2
b) O
2
c) H
2
d) H
2
O
2.
An ionic bond is present in
a) CaCl
2
b) H
2
O
c) CO
2
d) NH
3
3.
The electronegative values:
a) Are highest in alkali metals
b) Decrease in a period from left to right
c) Decrease in a group from top to bottom
d) Increase in a group from top to bottom
4.
Covalent compound
a) Have high melting and boiling points
b) Are soluble in water
c) Are neutral in aturen
d) Are less soluble in water
5.
Single covalent bond exists in:
a) N
2
b) NaCl
c) O
2
d) NH
3
6.
Identify a noble gas from the following
a) Ar
b) Be
c) Ag
d) Sr
7.
A bond which links a water molecule with a proton is
a) A metallic bond
b) A co-ordinate covalent bond
c) A covalent bond
d) An ionic bond
8.
Identify the incorrect statement about metals
a) They have high melting and boiling points
b) Metals are good conductors of heat
c) They are usually hard and heavy
d) None is correct or None
9.
All elements and compounds except ____________________ exist as combination of atoms.
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10.
The attractive force which keeps the atoms together in substance, is called a ________________.
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11.
Atoms have a tendency to __________________ their energy to stabilize them
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