Water Or Hydride Of Oxygen Quiz Online Practice Test

1. Water reacts with which of the following?

Metalloids

Metals only

Non-metals only

Both metals and non-metals

2. In hydrated salts, water exists in how many forms?

3. The type of hardness caused by the presence of bicarbonate ions of calcium and magnesium is known as:

Half hardness

Temporary hardness

Permanent hardness

Momentary hardness

4. Which method is most effective in producing water with zero hardness?

Electrolysis

Permutit process

Synthetic resins

Calgon process

5. Identify the method that effectively removes temporary hardness from water.

Boiling

Adding washing soda

Adding caustic soda

Adding sodium phosphate

6. Identify Calgon among the following options.

Potassium Phantom metaphosphate

Sodium Penta metaphosphate

Potassium hexametaphosphate

Sodium hexametaphosphate

7. Which synthetic resins are used for the removal of permanent hardness?

Cation exchange resins only

Anion exchange resins only

Both cation exchange resins and anion exchange resins

Neither cation exchange resins nor anion exchange resins

8. Determine the hybridization of the oxygen atom in a water molecule:

spd

sp³

sp²

9. At what temperature does water achieve its maximum density?

32°C

100°C

0°C

4°C

10. What is true about the dielectric constant of water?

Higher

Lower

11. What type of bond is responsible for the dissolution of urea?

Carbon bond

Oxygen bond

Hydrogen bond

Nitrogen bond

12. Which substance oxidizes water to oxygen?

H₂O₂

KMnO₄

ClO₂

Fluorine

13. The H-O-H bond angle in a water molecule is close to

90°

105°

135°

180°

14. What gas is produced when metals react with water or dilute mineral acids?

Tritium

Dihydrogen

Trihydrogen

Monohydrogen

15. How does potassium react with water?

Hydrolysis

Absorption

Exothermic

Endothermic

16. Which compound is used in Clarke's process for water softening?

Potash alum

Calcium bicarbonate

Calcium hydroxide

Sodium bicarbonate

17. Which type of water contains dissolved salts of calcium and magnesium?

Soft water

Heavy water

Conductivity water

Hard water

18. Which element does not react with oxygen?

19. Which substance cannot be oxidized by O₃ (ozone)?

FeSO₄

KMnO₄

K₂MnO₄

20. What is the molarity of pure water at 277K?

55.5M

2.5M

Test Name:	Water Or Hydride Of Oxygen Quiz
Subject Category:	Chemistry
Test Type:	Multiple Choice Questions
Total Score / Questions:	20 / 20
Time Allowed:	10 Min
Who Should Practice this Test:	Students, job seekers, or professionals preparing for competitive exams and interviews.

Water Or Hydride Of Oxygen MCQ Quiz Online Practice Test