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Chapter 11 - Heat and Thermodynamics - 17
1.
An atom which has an unpaired electron and bears no electrical charge is known as?
a) cation
b) molecular ion
c) free radical
d) anion
2.
When Chlorine has seven electrons in its outermost shell and bears no electrical charge, it is said to be?
a) free radical
b) none of these
c) cation
d) anion
3.
When a chlorin has eight electrons in its outermost shell and bears a negative charge, it is said to be?
a) none of these
b) a chloride anion
c) a chlorine free radical
d) a chloride cation
4.
Which one of the following is incorrect about free radical?
a) has even number of electrons
b) electrically neutral
c) has unpaired electron
d) bears an electrical charge
5.
Which one of the following is considered as a representative particle?
a) molecules
b) formula units
c) atoms
d) all of these
6.
Which one of the following is correct?
a) elements have atoms of same sizes
b) elements have atoms of different sizes
c) compounds have atoms of same sizes
d) free radicals bear a negative charge
7.
How many atoms are present in a monoatomic molecules?
a) one
b) three
c) two
d) four
8.
Polyatomic molecules are those which have?
a) more than one atoms
b) only one atom
c) no atom
d) all of these
9.
Inert gases are reffered to?
a) halogens
b) noble gases
c) alkaline earth metals
d) alkali metals
10.
Which one of the following is Not an inert gas?
a) Ne
b) Kr
c) O
2+
d) Rn
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