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Science M.C.Q-[Che-1M]

MODEL PAPER - 5 [2026] · CBSE STD 10 (CBSE - English Medium). 8 questions.

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M.C.Q-[Che-1M]

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8 questions · timed · auto-graded

MCQ 11 Mark
Which of the given statement is correct or wrong:
Statement A: Ethane decolorizes bromine water whereas ethyne does not.
Statement B: Mixture of water and alcohol is used in radiators of vehicles in cold countries.
  • A
    Both - Statement A and Statement B - are
  • B
    Statement A is true; Statement B is false. false.
  • ✓
    Statement B is true; Statement A is false.
  • D
    Both - Statement A and Statement B - are true.
Answer
Correct option: C.
Statement B is true; Statement A is false.
(C) Statement B is true; Statement A is false.
Explanation:
- The bromine water test is a test for unsaturated hydrocarbons. Ethane undergoes addition reaction and decolorizes bromine water. Similarly, ethyne also decolorizes bromine water.
- The mixture of water and alcohol is used in radiators of vehicles in cold countries. Alcohol is used for antifreeze mixture. Antifreeze is an additive that lowers the freezing point of a water-based liquid.
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MCQ 21 Mark
Which one of the following elements symbolized as A and B is a metal: ${ }_{11}^{23} A,{ }_{20}^{40} B$ ?
  • A
    B is metal
  • B
    Neither A nor B is a metal
  • C
    A is metal
  • ✓
    Both A and B are metals
Answer
Correct option: D.
Both A and B are metals
(D) Both A and B are metals
Explanation:A is Sodium (Atomic number 11) and B is Calcium (Atomic number 20). Both are metals.
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MCQ 31 Mark
Juice of tamarind turns blue litmus to red. It is because of the presence of an acid called:
  • A
    methanoic acid
  • B
    oxalic acid
  • ✓
    tartaric acid
  • D
    acetic acid
Answer
Correct option: C.
tartaric acid
(C) tartaric acid
Explanation:Juice of tamarind turns blue litmus to red. It is because of the presence of an acid called tartaric acid.
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MCQ 41 Mark
Carbon compounds:
i. are good conductors of electricity.
ii. are bad conductors of electricity.
iii. have strong forces of attraction between their molecules.
iv. have weak forces of attraction between their molecules.
The correct statements are:
  • A
    (i) and (ii)
  • B
    (ii) and (iii)
  • ✓
    (ii) and (iv)
  • D
    (i) and (iii)
Answer
Correct option: C.
(ii) and (iv)
(C) (ii) and (iv)
Explanation:
(ii) and (iv)
Carbon compounds is that they are poor conductors of electricity and do not have strong forces of attraction between their molecules.
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MCQ 51 Mark
Aluminum is used for making cooking utensils. Which of the following properties of aluminum are responsible for the same?
Image
i. Good thermal conductivity
ii. Good electrical conductivity
iii. Ductility
iv. High melting point
  • A
    (i) and (ii)
  • B
    (ii) and (iii)
  • C
    (i) and (iii)
  • ✓
    (i) and (iv)
Answer
Correct option: D.
(i) and (iv)
(D) (i) and (iv)
Explanation:
Aluminium has good thermal conductivity and high melting point. These properties are useful in the making of utensils. The commonly used metals in making utensils are copper, steel (an alloy of iron) and aluminium.
Copper and aluminium are the most preferred due to their conduction of heat.
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MCQ 61 Mark
Match the following with the correct response:
(i) The bond which holds cations and anions(a) Ionic
(ii) Self linking property of carbon(b) Pyridine
(iii) Denatured alcohol(c) Catenation
(iv) Synthetic detergents(d) Non-biodegradable
  • ✓
    (i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
  • B
    (i) - (d), (ii) - (a), (iii) - (c), (iv) - (b)
  • C
    (i) - (b), (ii) - (d), (iii) - (a), (iv) - (c)
  • D
    (i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
Answer
Correct option: A.
(i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
(A) (i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
Explanation:
- Ionic bonds are formed between cations and anions.
- Catenation is the linkage of atoms of the same element into longer chains. Catenation occurs most readily in carbon.
- Pyridine is added to alcohol to make it unsuitable for drinking.
- Most of the synthetic detergents are non-biodegradable. They cannot be decomposed by micro-organisms like bacteria.
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MCQ 71 Mark
The metal which melts when kept on the palm is:
  • A
    Sodium
  • B
    Potassium
  • C
    Lithium
  • ✓
    Gallium
Answer
Correct option: D.
Gallium
(D) Gallium
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MCQ 81 Mark
Which of the following statements are correct abount an aqueous solution of an acid and of a base?
A. higher the pH , stronger the acid
B. higher the pH , weaker the acid
C. Lower the pH , Stronger the base
D. Lower the pH , weaker the base
  • A
    All of these
  • ✓
    A and D
  • C
    B and C
  • D
    A and C
Answer
Correct option: B.
A and D
(B) A and D
Explanation:
Both (A) and (D) are correct. Higher the pH , stronger is the base. Basicity of a solution increases from pH value 8 to14.
Lower the pH , higher is the acidity. Acidity of a solution increases from 6 to 0 .
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M.C.Q-[Che-1M] - Science STD 10 Questions - Vidyadip