11th revision quiz: Hydrogen and s-block-1

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Question 1

The bond length of , and H₂ are in the following order

• A
• B
• C
• D

Question 2

The melting point is highest for

• Arock salt
• Bpotassium chloride
• Cmagnesium oxide
• Dbarium oxide

Question 3

Beleaching powder is obtained by the interaction of chlorine with

• Aconcentrated solution of calcium
• Bdilute solution of calcium hydroxide
• Cdry calcium oxide
• Ddry slaked lime

Question 4

Which of the following is correct representation of bleaching powder?

• A
• B
• C
• D

Question 5

High boiling point of H₂O₂ than H₂O is because of:

• Ahigh molecular mass of H₂O₂
• BPresence of 2 O atoms in H₂O₂
• Cmore H-bonding in H₂O₂
• Dopen book structure of H₂O₂

Question 6

Consider the following reactions and choose an option correctly indicating the chemical property of water:
H₂O(l) + H₂O (l) →H₃O⁺ (aq)+ OH^-(aq)
Al₄C₃ (s)+ 12H₂O(l) → 4Al(OH)₃ (aq)+3CH₄ (g)
2Na(s) +2H₂O (l) →2NaOH (aq) +H₂ (g)

• AAmphoteric character, hydrolysis, oxidizing agent
• BAutoprotolysis, hydrolysis, reducing agent
• CAutoprotolysis, hydrolysis, oxidizing agent
• DAmphoteric character, hydrolysis, reducing character

Question 7

Which one of the following represents the correct ratio of the energy of electron in ground state of H atom to that of the electron in the first excited state of Li⁺?

• A4:9
• B9:4
• C1:4
• D4:1

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