The S-Block Elements Quiz-1

Question 1

The sequence of ionic mobility in aqueous solution is

Accepted Answer

$Cs^+>Rb^+>K^+>Na^+$

Answer

$Rb^+>K^+>Cs^+>Na^+$

Answer

$Na^+>K^+>Rb^+>Cs^+$

Answer

$K^+>Na^+>Rb^+>Cs^+$

Question 2

Alkali metals have negative reduction potential and hence they behave as

Accepted Answer

reducing agents

Answer

oxidizing agents

Answer

Lewis bases

Answer

electrolytes

Question 3

Which of the following statements is false regarding alkali metals?

Accepted Answer

Alkali metal hydrides are covalent in character

Answer

Alkali metals are soft and can be cut with the help of knife

Answer

Alkali metals do not occur in free state in nature

Answer

Alkali metals are highly electropositive

Question 4

In the Solvay process of manufacture of sodium carbonate, the by-product is

Accepted Answer

$CaCl_2$

Answer

$NH_4Cl $

Answer

$NaHCO_3$

Answer

$CO_2$

Question 5

The set representing the correct order of ionic radii is

Accepted Answer

$Na^+>Li^+>Mg^{2+}>Be^{2+}$

Answer

$Li^+>Na^+>Mg^{2+}>Be^{2+}$

Answer

$Mg^{2+}>Be^{2+}>Li^+>Na^+$

Answer

$Li^+>Be^{2+}>Na^+>Mg^{2+}$

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