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Each question contains STATEMENTS-1 (Ass...

Each question contains STATEMENTS-1 (Assertion) and STATEMENT -2 (Reason).
Examine the statements carefully and mark the correct answer according to the instructions given below:
STATEMENT-1: Rate of disintegration of thorium increases with the increase in moles of thorium.
STATEMENT-2: Rate of disintegration does not depend upon temperature, pressure

A

If both the statements are TRUE and STATEMENT-2 is the correct explanation of STATEMENT-1

B

If both the statement are TRUE but STATEMENT-2 is NOT the correct explanation of STATEMENT-1

C

If STATEMENT-1 is TRUE and STATEMENT-2 is FALSE

D

If STATEMENT-1 is FALSE and STATEMENT-2 is TRUE

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given statements, we will break down each assertion and reason step by step. ### Step 1: Understanding Statement 1 **Statement 1:** "Rate of disintegration of thorium increases with the increase in moles of thorium." - **Explanation:** The rate of disintegration refers to how quickly thorium is decaying. In nuclear chemistry, the disintegration of radioactive substances like thorium follows first-order kinetics. The rate of a first-order reaction is proportional to the concentration of the reactant. - When we increase the number of moles of thorium, we are effectively increasing its concentration (since concentration is defined as moles per unit volume). - Therefore, if the concentration increases, the rate of disintegration also increases. **Conclusion for Statement 1:** This statement is **true**. ### Step 2: Understanding Statement 2 **Statement 2:** "Rate of disintegration does not depend upon temperature, pressure." - **Explanation:** In nuclear reactions, the rate of disintegration is primarily determined by the properties of the radioactive substance and is not significantly affected by external conditions such as temperature and pressure. - This is different from chemical reactions where temperature and pressure can greatly influence the reaction rates. - Therefore, the statement correctly indicates that the rate of disintegration of thorium is independent of these factors. **Conclusion for Statement 2:** This statement is also **true**. ### Step 3: Evaluating the Relationship Between the Two Statements - While both statements are true, we need to determine if Statement 2 correctly explains Statement 1. - Statement 1 discusses how the rate of disintegration increases with more moles of thorium, while Statement 2 states that the rate does not depend on temperature and pressure. - The increase in the rate due to more moles is due to the increase in concentration, not because of temperature or pressure. **Final Conclusion:** Both statements are true, but Statement 2 does not provide a correct explanation for Statement 1. Therefore, the correct answer is that both statements are true, but Statement 2 is not the correct explanation of Statement 1.
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