31.

Ammonium ion is

• a conjugate acid

• a conjugate base

• neither acid nor a base

• both an acid and a base

74.5 g of a metallic chloride contains 35.5 g of chlorine, the  quivalent weight of the metal is

• 19.5

• 35.5

• 39

• 78.0

The starting material used in Solvay's process  are

• sodium sulphate

• brine solution

• carnallite

• all of the above

The first ionisation potential of Na, Mg, Al and Si are in the order

• Na <Mg>  Al <Si

• Na> Mg> Al> Si

• Na < Mg< Al> Si

• Na> Mg> Al<Si

Which of the oxides does not react with both of an acid and alkali, is ?

• ZnO

• SnO₂

• Al₂O₃

• BeO

The oxidation state of C in C₆H₁₂O₆ is

• +6

• -6

• 0

• +4

The correct IUPAC name of  is

• 1-cyclopropyl cyclobutane

• 1, 1-dicyclobutane

• 1-cyclobutane- 1- cyclopropane

• none of the above

Geometrical isomerism is possible in

• acetone- oxime

• isobutene

• acetophenone-oxime

• benzophenone-oxime

Permanent hardness can be removed by adding

• Cl₂

• Na₂CO₃

• Ca(OCl)Cl

• K₂CO₃

Alums are used for

• tanning of leather

• coagulation of blood

• purification of water

• all of the above