Question

ASSERTION AND REASONING DIRECTION :
In the following questions, a statement of assertion
(A) is followed by a statement of reason
(R). Mark the correct choice as: (a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of the 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 1. Assertion(A) : Naphthalene does not leave any residue when kept open for some time. Reason(R) : The conversion of a solid directly into gas is called condensation. 2. Assertion(A) : There is no change in the temperature of a substance when it undergoes a change of state though it is still being heated. Reason(R) : The heat supplied is absorbed either as latent heat of fusion or as latent heat of vaporisation. SHORT ANSWERS 3. Write the terms for numbers in the below figure 4. The heating curve of a pure substance at one atmospheric pressure is shown in the figure. a) What is the physical state of the substance at points A,B,C,D,E. b) What is the melting point of the substance? c) What is the boiling point of the substance? d) What happens to the temperature when the substance is changing the state? -----------------------

Answer 1

• ♥ Bhai Itna Tym Nahi H Padhne Ka............

Answer 2

Answer:

the correct answer is b

this may be correct