Question

Two statements are given below: I. In dry cleaning, the solvent \(Cl_2C\) = \(CCl_2\) was earlier used and now it is replaced by liquefied \(CO_2\).
II. In bleaching of paper, \(H_2O_2\) was used earlier and now it is replaced by chlorine gas.

• A. Statements I, II both are correct
• B. Statements I, II both are incorrect
• C. Statement I is correct but statement II is incorrect
• D. Statement I is incorrect but statement II is correct

Hint:

For dry cleaning, liquefied \(CO_2\) has replaced harmful solvents like \(Cl_2C\) = \(CCl_4\) due to environmental concerns. In paper bleaching, \(H_2O_2\) is still the preferred choice over chlorine gas.

Answer 1

The Correct Option is C

- Statement I: In dry cleaning, the solvent used was previously \(Cl_2C\) = \(CCl_4\), but due to environmental concerns, it has been replaced by liquefied \(CO_2\), which is safer and more environmentally friendly. Thus, Statement I is correct.
- Statement II: In the bleaching of paper, chlorine gas is not used as a replacement for \(H_2O_2\). \(H_2O_2\) is still used in most bleaching processes. Therefore, Statement II is incorrect. Thus, the correct answer is option (3), where Statement I is correct and Statement II is incorrect.