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

MODEL PAPER - 7 [2026] · CBSE STD 10 (CBSE - English Medium). 7 questions.

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

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7 questions · timed · auto-graded

MCQ 11 Mark
Baking soda is a mixture of :
  • A
    Sodium carbonate and acetic acid
  • B
    Sodium hydrogen carbonate and acetic acid
  • ✓
    Sodium hydrogen carbonate and tartaric acid
  • D
    Sodium carbonate and tartaric acid
Answer
Correct option: C.
Sodium hydrogen carbonate and tartaric acid
(C) Sodium hydrogen carbonate and tartaric acid
Explanation :
Baking soda is a mixture of sodium hydrogen carbonate $\left( NaHCO _3\right)$ and a mild edible tartaric acid.
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Question 21 Mark
The correct structural formula of butanoic acid is
Image
Answer

Image
The general formula of a carboxylic acid is R-COOH where R is an alkyl group. So, because 'butane' shows the presence of 4 single-bonded carbon atoms 'oic acid' shows the presence of Image group. The formula of butanoic acid is $C _3 H _7 COOH$.
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MCQ 31 Mark
Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?
  • ✓
    Graphite
  • B
    Diamond
  • C
    Sulphur
  • D
    Fullerene
Answer
Correct option: A.
Graphite
(A) Graphite
Explanation :
Graphite is a good conductor of electricity and heat. Graphite has weak intermolecular forces between its layers. Hence it has de-localized electrons. As electrons are free to move through its structure, it conducts heat and is a good conductor of electricity.
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MCQ 41 Mark
Match the following with the correct response :
Column AColumn B
(i) Alcohol(a) - X
(ii) Aldehyde(b) - CHO
(iii) Ketone(c) - OH
(iv) Haloalkane(d) - CO -
  • ✓
    (i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
  • B
    (i) - (b), (ii) - (d), (iii) - (a), (iv) - (c)
  • C
    (i) - (d), (ii) - (a), (iii) - (c), (iv) - (b)
  • D
    (i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
Answer
Correct option: A.
(i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
(A) (i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
Explanation :
- The general formula of an alcohol is R-OH.
- The general formula of an aldehyde is R-CHO.
- The general formula of a ketone is R-CO-R'.
- The general formula of a halo-alkane is R-X.
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MCQ 51 Mark
Which of the following represents favourable conditions for the process of fermentation of ethyl alcohol?
  • A
    Presence of light
  • B
    Presence of air
  • ✓
    None of these
  • D
    Very high temperature
Answer
Correct option: C.
None of these
(C) None of these
Explanation :
The process of fermentation is carried in the dark at a temperature of about $30^{\circ} \mathrm{C}$. The vessel is kept closed and air is not allowed to enter.
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MCQ 61 Mark
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of
the following correctly represents the type of the reaction involved?
i. Displacement reaction
ii. Precipitation reaction
iii. Combination reaction
iv. Double displacement reaction
  • A
    (iv) only
  • ✓
    (ii) and (iv)
  • C
    (ii) and (iii)
  • D
    (i) only
Answer
Correct option: B.
(ii) and (iv)
(B) (ii) and (iv)
Explanation :
Barium chloride on reacting with ammonium sulfate forms barium sulfate and ammonium chloride, it is the double displacement and precipitation reaction.
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MCQ 71 Mark
When a small amount of acid is added to water, the phenomena which occur are :
A. Dilution
B. Neutralisation
C. Formation of $\mathrm{H}_{3} \mathrm{O}^{+}$ions
D. Salt formation
The correct statements are :
  • A
    (C) and (D)
  • ✓
    (A) and (C)
  • C
    (B) and (D)
  • D
    (A) and (B)
Answer
Correct option: B.
(A) and (C)
(B) (A) and (C)
Explanation :
(A) and (C)
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