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Class 9 Chemistry · Chapter 3 · Test 8

Bonding Applications

25 MCQs covering hydration, precipitation reactions, electrolysis, conductivity of ionic solutions, and practical applications of chemical bonding.

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

Question 1
What is hydration?
- ACombination of ions with water molecules
- BRemoval of water from a compound
- CFormation of a metal bond
- DTransfer of electrons
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Answer: A
Hydration involves water molecules surrounding dissolved ions.
Question 2
Which substance commonly hydrates ions in aqueous solutions?
- AWater
- BPetrol
- COil
- DAlcohol
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Answer: A
Water molecules surround and interact with dissolved ions.
Question 3
What happens when sodium chloride dissolves in water?
- AIt separates into hydrated ions
- BIt forms sodium metal
- CIt becomes a covalent gas
- DIt loses all its electrons
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Answer: A
Sodium chloride separates into hydrated sodium and chloride ions.
Question 4
Which ions are formed when calcium chloride dissolves in water?
- ACa2+ and 2Cl-
- BCa+ and Cl2-
- CCa- and 2Cl+
- DCa2- and Cl+
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Answer: A
Calcium chloride dissociates into one calcium ion and two chloride ions.
Question 5
Why does solid sodium chloride not conduct electricity?
- AIts ions cannot move freely
- BIt has no ions
- CIt contains free electrons
- DIt is a gas
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Answer: A
The ions are fixed in the solid crystal lattice.

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