🔥🌟 Grand Chemistry MCQs Test for Class 10 | Interactive Quiz 🧪💡 | Learn & Practice!

Welcome to Inamjazbi Learn Chemistry! 🎉 This ultimate Class 10 Chemistry MCQs test covers chemical equilibrium, acids, bases and salts, organic chemistry, biochemistry and much more. Test your knowledge with interactive questions, get instant feedback on each answer, and see your final score at the end! 🧠Keep track of your score and challenge yourself!

Whether you are preparing for exams or just love Chemistry, this quiz is perfect for sharpening your concepts. Ready, set, answer! ⚡

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🔥🌟 Grand Chemistry MCQs Test for Class 10 | Interactive Quiz 🧪💡 | Learn & Practice!

Interactive MCQ Quiz

1. Rickets is caused by the deficiency of:

• a) Vitamin A
• b) Vitamin B
• c) Vitamin C
• d) Vitamin D

Explanation: Rickets is caused by a deficiency of Vitamin D, which is essential for calcium absorption in the body.

2. For a reversible reaction, if the concentration of both reactants is doubled, then equilibrium constant is:

• a) Also doubled
• b) Halved
• c) Quadrupled
• d) Not changed

Explanation: The equilibrium constant does not change when the concentrations of reactants are changed, as it is a function of temperature.

3. Nitrogen and hydrogen were reacted together to make ammonia (N₂ + 3H₂ ⇌ 2NH₃). What will be present in the equilibrium mixture?

• a) NH₃ only
• b) N₂, H₂ and NH₃
• c) N₂ and H₂
• d) H₂ only

Explanation: At equilibrium, N₂, H₂, and NH₃ are present in the mixture.

4. The error caused by improper functioning of instrument is:

• a) Determinant Error
• b) Indeterminant Error
• c) Systematic Error
• d) Both a and c

Explanation: Systematic errors are caused by malfunctioning equipment and consistently affect measurements in the same way.

5. Which one of the following gives yellow flame in flame test?

• a) LiCl
• b) NaCl
• c) KCl
• d) CaCl₂

Explanation: Sodium chloride (NaCl) produces a yellow flame during a flame test.

6. The % of equipment failure in creating errors and deviations is:

• a) 13
• b) 16
• c) 10
• d) None of them

Explanation: Equipment failure accounts for approximately 13% of errors and deviations in experiments.

7. The wavelength range of ultraviolet and visible spectroscopy is:

• a) 192 to 900 nm
• b) 152 to 800 nm
• c) 2.5 μm to 15 μm
• d) None of them

Explanation: The range for ultraviolet and visible light spectroscopy is from approximately 192 to 900 nm.

8. The latent heat of fusion of ice is approximately:

• a) 6 kJ/mol
• b) 41 kJ/mol
• c) 10 kJ/mol
• d) None of them

Explanation: The latent heat of fusion for ice is around 6 kJ/mol.

9. The number of hydrogen bonds formed by one water molecule is/are:

• a) Two
• b) Three
• c) Four
• d) One

Explanation: One water molecule forms four hydrogen bonds due to the polarity of the molecule.

10. In hard water, the amount of dissolved Ca ions in mg/L is:

• a) 0 to 16.1
• b) 16.1 to 60
• c) 61 to 120
• d) 121 to 180

Explanation: Hard water contains dissolved calcium (Ca²⁺) ions typically in the range of 121 to 180 mg/L.

11. For which system does the equilibrium constant, Kc have units of concentration?

• a) CO₂(g) + H₂(g) ⇌ CO(g) + H₂O(g)
• b) N₂(g) + O₂(g) ⇌ 2NO(g)
• c) H₂(g) + I₂(g) ⇌ 2HI(g)
• d) N₂(g) + 3H₂(g) ⇌ 2NH₃(g)

Explanation: Kc has units of concentration when the number of moles of gaseous reactants and products is not equal.

12. The functional groups –CHO and –COOH are used respectively for:

• a) Aldehydes and Ester
• b) Aldehydes and Carboxylic acids
• c) Carboxylic acids and aldehydes
• d) Ketones and carboxylic acids

Explanation: –CHO is the functional group for aldehydes, and –COOH is the functional group for carboxylic acids.

13. Bituminous coal contains how much % of Carbon?

• a) 50%
• b) 60%
• c) 70%
• d) 80%

Explanation: Bituminous coal typically contains around 80% carbon.

14. Select the correct name of the given organic compound; CH₃COCH₃:

• a) Acetaldehyde
• b) Acetic acid
• c) Acetylene
• d) Acetone

Explanation: CH₃COCH₃ is the structural formula for acetone, a common solvent.

15. Rancid butter has a foul smell because of:

• a) Nitric Acid
• b) Tartaric Acid
• c) Butanoic Acid
• d) Sulphuric Acid

Explanation: The foul smell of rancid butter is caused by butanoic acid, which is produced by the breakdown of fats.

16. Acid rain affects the aquatic life by clogging fish gills because of:

• a) Mercury
• b) Chromium
• c) Aluminium
• d) Lead

Explanation: Acid rain releases aluminium ions into water, which clog fish gills and affect their oxygen intake.

17. The bond angle between H-O-H in water is:

• a) 109.5°
• b) 107°
• c) 104.5°
• d) 180°

Explanation: The bond angle in water (H₂O) is 104.5°, due to the lone pairs on oxygen causing the angle to be less than 109.5°.

18. Which of the following is helpful for removal of permanent hardness?

• a) Na₂CO₃
• b) Ca(OH)₂
• c) CaCO₃
• d) Na₂SO₄

Explanation: Sodium carbonate (Na₂CO₃) is used to remove permanent hardness by precipitating calcium and magnesium ions as carbonates.

19. The soft drinks are prepared by mixing raw materials at:

• a) 65° Brix
• b) 70° Brix
• c) 55° Brix
• d) 95° Brix

Explanation: Soft drinks are usually prepared at 65° Brix, which refers to the concentration of sugar in the mixture.

20. Which one of the following gives orange-red flame in flame test?

• a) LiCl
• b) NaCl
• c) KCl
• d) CaCl₂

Explanation: Calcium chloride (CaCl₂) gives a characteristic orange-red flame in flame tests due to the excitation of caclium ions.

21. The altitude on stratosphere is:

• a) 40 to 45 km
• b) 70 to 75 km
• c) 60 to 65 km
• d) 50 to 55 km

Explanation: The stratosphere starts at approximately 10-15 km above the Earth's surface and extends to about 50 to 55 km.

22. Which of the following is NOT a greenhouse gas?

• a) Methane
• b) Oxygen
• c) Carbon dioxide
• d) Ozone

Explanation: Oxygen (O₂) is not a greenhouse gas, unlike methane, carbon dioxide, and ozone which trap heat in the Earth's atmosphere.

23. Which one of these is a saturated hydrocarbon?

• a) C₅H₁₀
• b) C₄H₁₀
• c) C₃H₄
• d) C₆H₁₂

Explanation: C₄H₁₀ is a saturated hydrocarbon (alkane), where all the carbon atoms are single-bonded.

24. The formula C₃H₄ is :

• a) Propene
• b) Propane
• c) Propyne
• d) Cyclopropane

Explanation: C₃H₄ is propyne.