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Chapter 11 - Heat and Thermodynamics - 18
1.
Which one of the following is Not a monoatomic molecule?
a) He
b) HCl
c) Ne
d) Ar
2.
Which one of the following is an innert gas?
a) H
2
b) HCl
c) O
2
d) Rn
3.
During 600-1600 AD, the pseudo-science that dominated the chemical history was known as?
a) chemistry
b) alchemy
c) kemistry
d) kemya
4.
Mole is used to measure the?
a) speed of a substance
b) hight of a substance
c) amount of a substance
d) distance of a substance
5.
Which one of the following represents an Avogadros number?
a) 6.022
b) 6.022 x 10
22
c) none of these
d) 6.022 x 10
23+
6.
The symbol of Avogadros number is?
a) N
A+
b) N
G
c) A
G
d) A
N
7.
How many particles of a substance are present in one mole of that substance?
a) 6.022 x 10
23+
b) 6.023
c) 6.022
d) 6.022 x 10
22
8.
A mole of a substance contains 6.022 x 10
23
___ of that substance?
a) atoms
b) all of these
c) ions
d) molecules
9.
The mass of one mole of a substance is known as?
a) avogadros number
b) formula mass
c) molar mass
d) molecular mass
10.
How many moles of atoms are present in gram atomic mass of an element?
a) one
b) three
c) two
d) four
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