# ICSE Class 10 Answered

**1)WHICH PROPERTY OF H2SO4 ACCOUNTS FOR ITS USE AS A DRYING AGENT? 2)CONCENTRATED H2SO4 IS BOTH AN OXIDISING AGENT AND A NON VOLATILE ACID. WRITE 1 EQUATION TO ILLUSTRATE THE ABOVE MENTIONED PROPERTIES OF H2SO4**

**1) H**dehydrating

_{2}SO_{4}is used as**agent.**

_{2}SO

_{4}has a great affinity for water. It readily removes elements of water from other compounds.

**2)**

**(a) Conc. H**oxidising

_{2}SO_{4}as an**agent:**

_{2}SO

_{4}→ H

_{2}O + SO

_{2}+[O]

** a. ****Non-metals**

C + 2H_{2}SO_{4} → CO_{2} + 2H_{2}O +2SO_{2}

S + 2H_{2}SO_{4} → 2H_{2}O +3SO_{2}

** b. ****Metals**

Cu + 2H_{2}SO_{4} → CuSO_{4} + 2H_{2}O +SO_{2}

Zn + 2H_{2}SO_{4} → ZnSO_{4} + 2H_{2}O +SO_{2}

** c. ****Inorganic compounds**

2HBr + H_{2}SO_{4} →Br_{2} + 2H_{2}O + SO_{2}

H_{2}S + H_{2}SO_{4} → S + 2H_{2}O + SO_{2}

** (b) ****Non-volatile nature**

It has a high boiling point, so it is used to prepare volatile acids such as HCl, HNO_{3} and acetic acid from their salts by double decomposition.

NaCl + H_{2}SO_{4} →NaHSO_{4 }+ HCl

NaNO_{3} + H_{2}SO_{4} →NaHSO_{4 }+ HNO_{3}

CH_{3}COONa + H_{2}SO_{4} →NaHSO_{4 }+ CH_{3}COOH