Chemistry CDF mock test

The oxidation number of an atom in its elementary form is

• 1

• 0

• 2

• 3

Oxidation number of sodium is

• +1

• 0

• +2

• +4

The oxidation number of hydrogen in sodium hydride is

• +1

• -1

• +2

• +4

The oxidation number of alkaline earth metals is

• +2

• +5

• +6

• +1

The oxidation number of each oxygen atom in peroxide ion is

• -1

• +2

• +3

• +4

The initial substance which involves in chemical reaction is

• Reactant

• Product

• Chemical equation

• Chemical reaction

The Oxidation number of oxygen atom in ozonide compound is

• -1/3

• +2

• +3

• +4

The new substance formed by chemical reactions is called

• Reactant

• Catalyst

• Chemical formula

• None of the above

The maximum oxidation number of an element is equal to its group number except

• Oxygen

• Flourine

• Magnesium

• Both 1&2

The oxidation number of an hydrogen atom in HCl is

• +1

• +2

• +3

• +4