The catalyst used in the contact process is

• Copper

• Iron

• Vanadium pentoxide

• Manganese dioxide

Fill up the blanks with the correct choice given in brackets.

Ionic or electrovalent compounds do not conduct electricity in their _______ state. (fused/solid)

The IUPAC name of dimethyl ether is:

• Ethoxy methane

• Methoxy methane

• Methoxy ethane

• Ethoxy ethane

The salt solution which does not react with ammonium hydroxide is:

• Calcium Nitrate

• Zinc Nitrate

• Lead Nitrate

• Copper Nitrate

Fill up the blanks with the correct choice given in brackets.

Dry hydrogen chloride gas can be collected by ________ displacement of air. (downward / upward)

Fill up the blanks with the correct choice given in brackets.

The most common ore of iron is ________. (Calcium / Haematite)

The electrolysis of acidified water is an example of:

• Reduction

• Oxidation

• Redox Reaction

• Synthesis

Fill up the blanks with the correct choice given in brackets.

The salt prepared by the method of direct combination is _______. (iron (II) chloride / iron (III) chloride)

The organic compound which undergoes substitution reaction is :

• C₂H₂

• C₂H₄

• C₁₀H₁₈

• C₂H₆

Fill up the blanks with the correct choice given in brackets.

Electrolysis of aqueous sodium chloride solution will form ________ at the cathode. (Hydrogen gas / Sodium metal)