Water

Water

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Easy

Created by

Wayground Content

Used 2+ times

FREE Resource

The video tutorial explores water's unique properties, including its states, high dielectric constant, and role as a solvent. It discusses water's molecular structure, hydrogen bonding, and its amphoteric nature. The tutorial also covers water's chemical reactions, such as oxidation and reduction, and its ability to form hydrates. Additionally, it explains the concepts of water hardness, differentiating between temporary and permanent hardness, and outlines various methods for treating hard water, including boiling, lime treatment, and ion exchange.

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7 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What property of water allows it to dissolve many ionic and polar substances?

Low density

High dielectric constant

Low boiling point

High viscosity

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the bond angle in a water molecule due to lone pair repulsion?

120 degrees

180 degrees

90 degrees

104.5 degrees

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the crystalline structure of ice at atmospheric pressure?

Cubic

Hexagonal

Tetragonal

Orthorhombic

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does water behave when it reacts with highly electropositive metals?

It is reduced to dihydrogen

It forms hydrates

It remains unchanged

It forms a precipitate

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main cause of temporary hardness in water?

Soluble nitrates

Soluble chlorides

Soluble bicarbonates

Soluble sulfates

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method involves exchanging calcium and magnesium ions for sodium ions to soften water?

Ion exchange

Lime treatment

Washing soda treatment

Boiling

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What compound is used to remove permanent hardness by forming complex ions with calcium and magnesium?

Magnesium sulfate

Calcium carbonate

Sodium hexametaphosphate

Sodium chloride

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