NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Chemistry Coaching Programs

πŸ“Ή Video Course 2024 (8 Lectures [4 Hrs : 33 Mins]): Offline Support

Click Here to View & Get Complete Material

Rs. 100.00

1 Month Validity (Multiple Devices)

⏳ 🎯 Online Tests (5 Tests [50 Questions Each]): NTA Pattern, Analytics & Explanations

Click Here to View & Get Complete Material

Rs. 500.00

3 Year Validity (Multiple Devices)

πŸŽ“ Study Material (159 Notes): 2024-2025 Syllabus

Click Here to View & Get Complete Material

Rs. 350.00

3 Year Validity (Multiple Devices)

🎯 3111 MCQs (& PYQs) with Full Explanations (2024-2025 Exam)

Click Here to View & Get Complete Material

Rs. 650.00

3 Year Validity (Multiple Devices)

Chemistry Class - 11: Chapter – 6. Thermodynamics Part – 10

V. Assertion and Reason Type

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Question: 55

Assertion (A) : Combustion of all organic compounds is an exothermic reaction.

Reason (R) : The enthalpies of all elements in their standard state are zero.

(i) Both A and R are true and R is the correct explanation of A.

(ii) Both A and R are true but R is not the correct explanation of A.

(iii) A is true but R is false.

(iv) A is false but R is true.

Answer: (ii)

Question: 56

Assertion (A) : Spontaneous process is an irreversible process and may be reversed by some external agency.

Reason (R) : Decrease in enthalpy is a contributory factor for spontaneity.

(i) Both A and R are true and R is the correct explanation of A.

(ii) Both A and R are true but R is not the correct explanation of A.

(iii) A is true but R is false.

(iv) A is false but R is true.

Answer: (ii)

Question: 57

Assertion (A) : A liquid crystallizes into a solid and is accompanied by decrease in entropy.

Reason (R) : In crystals, molecules organize in an ordered manner.

(i) Both A and R are true and R is the correct explanation of A.

(ii) Both A and R are true but R is not the correct explanation of A.

(iii) A is true but R is false.

(iv) A is false but R is true.

Answer: (i)