🧪 NCERT Class 10 MCQ Quiz Hub

1. Carbon exists in the atmosphere in the form of:
Only carbon monoxide
Carbon monoxide in traces and carbon dioxide
Only carbon dioxide
Coal [NCERT Examplar]

2. Buckminster fullerene is an allotropic form of:
Phosphorus
Sulphur
Carbon
Tin

3. Which of the following does not belong to the same homologous series?
CH4
C2H2
C3H8
C4H8

4. In the soap micelles
The ionic end of soap ¡s on the surface of the cluster, white the carbon chain is in the interior of the cLuster.
The ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster.
Both the ionic end and carbon chain are in the interior of the cluster.
Both the ionic end and carbon chain are on the exterior of the cluster.

5. Ethanol reacts with sodium and forms two products. These are:
Sodium ethanoate and hydrogen
Sodium ethanoate and oxygen
Sodium ethoxide and hydrogen
Sodium ethoxide and oxygen

6. Ethanol reacts with sodium and forms two products. These are:
Sodium ethanoate and hydrogen
Sodium ethanoate and oxygen
Sodium ethoxide and hydrogen
Sodium ethoxide and oxygen

7. If you take some distilled water in a test- tube, add an equal amount of acetic acid to it, shake the test tube well and leave it undisturbed on the test tube stand, then after about 5 minutes, what would you observe?
There is a Layer of water over the layer of acetic acid.
A precipitate is settling at the bottom of the test tube.
Bubbles of colorless gas are coming out of the test tube.
There is a clear, colorless transparent solution in the test tube.

8. In the preparation of soap addition of sodium chloride causes:
Complete saponification
Complete hydrolysis
Complete precipitation
Complete neutralization

9. A student is given equal amount of three samples of water with temporary hardness labeled as ‘A’, ‘B’ and ‘C’. He keeps the three samples at different temperatures – A at room temperature, B at 50 °C and C at 95 °C. Which sample will give maximum amount of lather when 10 mL of soap solution is added to each sample and shaken for equal time?
(A) only
Both (A) & (B)
Both (B) and (C)
(C) only

10. Which of the following compounds do not contain the Carboxylic acid functional group? (I) C2H5COOH (II) C3H7OH (III) CH3COOH (IV) CH3CHO
Both (I) and (II)
Both (II) and (III)
Both (I) and (III)
Both (II) and (IV)