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Science Assertion - Reasoning (1 Marks)

MODEL PAPER 7 · CBSE STD 10 (CBSE - English Medium). 4 questions.

Questions

Assertion - Reasoning (1 Marks)

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4 questions · timed · auto-graded

Question 11 Mark

Assertion (A): Corrosion of iron is commonly known as rusting
Reason (R): Corrosion of iron occurs in presence of water and air. 

Answer
(b) Both A and R are true but R is not the correct explanation of A.
Explanation: Both A and R are true but R is not the correct explanation of A. Corrosion occurs due to the oxidation of iron.
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Question 21 Mark
Assertion (A): Amoeba always produces two daughter amoebae while Plasmodium divides into many daughter cells.
Reason (R): Amoeba undergoes binary fission while Plasmodium undergoes multiple fission.
Answer
(a) Both A and R are true and R is the correct explanation of A.
Explanation: Both A and R are true and R is the correct explanation of A.
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Question 31 Mark

Assertion (A): The magnitude of the magnetic field at a point on the axis of a current-carrying solenoid is inversely proportional to the current flowing through the solenoid. 
Reason (R): The magnitude of the magnetic field at a point on the axis of a current-carrying solenoid is directly proportional to the number of turns per unit length of a solenoid. 

Answer
(d) A is false but R is true.
Explanation: A is false but R is true.
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Question 41 Mark
Assertion (A): Ozone is very important layer of atmosphere.
Reason (R): Ozone protects the living organisms from harmful UV radiation of sun.
Answer
(a) Both A and R are true and R is the correct explanation of A.
Explanation: Both A and R are true and R is the correct explanation of A.
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Assertion - Reasoning (1 Marks) - Science STD 10 Questions - Vidyadip