Chemistry Class 9th

101 -In an atom the number of protons and electrons are

A. Equal

B. Not equal

C. Electrons> protons

102-The atom carries negative or positive charge due to lose or gain of electron is called

A. Cation

B. Ion

C. molecular ion

103-There are --------------- types of ions?

A. 2

B) 3

C) 4

104-The atom having positive charge on it, is called

A. Ion

B) Molecular ion

C) Cation

105- The atom containing negative charge on it, is called

A. Anion

B) Cation

C) Ion

106- An atom is a smallest particle of an

A) Element

B) Cation

C) Ion

107- An ion is a smallest particle of a

A) Ionic Compound

B) Cation

C) Ion

108-Follwing are the types of cation except

A) Mg+2

B) Na+1

C) F-1

109- Which is the example of anion?

A) Cl-

B) H+

C) Na+

110- Molecules are electrically

A) Charged

B) Neutral

C) None of these

111- Molecular ions are also called

A) Radicals

B) Compound

C) Anions

112- -------- are the atoms or group of atoms having single or odd charge

A) Radicals

B) Anion

C) Cation

113- Radicals are represented by

A) Positive charge

B) Dot

C) Negative charge

114- Example of free radical is

A) H+

B) Cl-

C) H

115- A free radical is ---------- specie

A) Neutral

B) Reactive

C) Both a and b

116- A free redical can exist

A) Independently

B) Not independently

C) None of these

117-The smallest unit of substance is called

A) Atom

B) Ion

C) Molecule

118- Molecule is a smallest particle of

A) Atom

B) Ion

C) Matter

119- Molecule exist ---------- in nature

A) Freely

B) Independently

C) Both a and b

120- Which is the example of molecule?

A) H

B) O

C) H2O