Polytechnic & Diploma Engineering Entrances (JEECUP, POLYCET & DTED)

Chemical Reactions & Applied Chemistry question bank (Polytechnic Chemistry)

Practice 45 free Polytechnic & Diploma Engineering Entrances (JEECUP, POLYCET & DTED) Polytechnic Chemistry - Chemical Reactions & Applied Chemistry questions with answers and step-by-step solutions.

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Q1.

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Rusting of iron in moist air is an exothermic chemical oxidation process.

Reason (R): Rusting requires continuous absorption of thermal energy from ambient surroundings to proceed.


(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
(C)
Assertion (A) is true but Reason (R) is false.
(D)
Assertion (A) is false but Reason (R) is true.
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Q2.

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): An aqueous solution of pure glucose does not conduct electric current.

Reason (R): Glucose is a covalent molecular compound that does not dissociate into free mobile ions in water.


(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(B)
Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).
(C)
Assertion (A) is true but Reason (R) is false.
(D)
Assertion (A) is false but Reason (R) is true.
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