Chapter 11 Multiple Choice Questions

. The metals from Group 1 are different from metals in other groups in that:

They have low densities and are very reactive.

They have low densities and are not very reactive.

They have high densities and are very reactive.

. Electrolysis of a molten halide is used for the isolation of:

Cs

K

Na

. Find the incorrect statement:

All common salts of oxoacids of Group 1 elements are soluble in water.

All the Group 1 cations are soft Lewis acids.

The Group 1 elements react easily with oxygen.

. Select the correct order of arrangement of the Group 1 halides according to their increasing stability:

CsF < RbF < KF < NaF < LiF

LiF < NaF < KF < RbF < CsF

LiF < LiCl < LiBr < LiI

. Only _________ forms a normal oxide in direct reaction with O₂.

K

Na

Li

. Which statement is correct about the Group 1 carbonates?

All Group 1 carbonates, except that of Li, are soluble in water.

All Group 1 carbonates, except that of Li, decompose significantly when heated.

Sodium carbonate is produced by the Solvay process.

. In which way lithium carbide differs from other group 1 carbides?

it can be prepared directly from the elements

it does not react with water

it is a ionic compound.

. Which of the listed oxosalts of sodium is used as fertilizer?

Na₂SO₄

NaNO₃

Na₂CO₃

. The Group 1 metal ions are hard Lewis acids. Therefore, their interactions with Lewis bases are predominantly:

covalent

electrostatic

metallic

. Transmetallation reactions involve:

breaking metal-carbon bonds and forming new metal-carbon bonds but with a different metal

breaking metal-carbon bonds and forming metal-metal and carbon-carbon bonds

breaking metal-carbon bonds and forming carbon-carbon bonds and elemental metal

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