JEE PYQ: P Block Elements Question 54
Question 54 - 2019 (10 Apr Shift 2)
A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373 K leads to an anhydrous white powder Z. X and Z, respectively, are:
(1) Washing soda and soda ash
(2) Baking soda and dead burnt plaster.
(3) Washing soda and dead burnt plaster.
(4) Baking soda and soda ash.
Show Answer
Answer: (1)
Solution
$\text{Na}_2\text{CO}_3 \cdot 10\text{H}_2\text{O} \to \text{Na}_2\text{CO}_3 \cdot \text{H}_2\text{O} + 9\text{H}_2\text{O}$ (X = Washing soda, Y). $\text{Na}_2\text{CO}_3 \cdot \text{H}_2\text{O} \to \text{Na}_2\text{CO}_3 + \text{H}_2\text{O}$ (Z = Soda ash).
BETA
