A white solid X on heating gives a white solid Y and an acidic gas Z. Gas Z is also given out when X reacts with an acid. The compound Y is also formed if caustic soda is left open in the atmosphere. X, Y and Z are X Y Z (a) NaHCO3 Na2CO3 CO2 (b) Na2CO3 NaOH CO2 (c) Na2CO3 NaHCO3 CO2 (d) NaOH NaHCO3 CO2

Question

A white solid X on heating gives a white solid Y and an acidic gas Z. Gas Z is also given out when X reacts with an acid. The compound Y is also formed if caustic soda is left open in the atmosphere. X, Y and Z are X Y Z (a) NaHCO3 Na2CO3 CO2 (b) Na2CO3 NaOH CO2 (c) Na2CO3 NaHCO3 CO2 (d) NaOH NaHCO3 CO2 (A) a (B) b (C) c (D) d

Tardigrade Admin · Accepted Answer

underset(X)2 NaHCO 3 arrow underset(Y)Na 2 CO 3+ underset(Z)CO 2+ H 2 O underset(X)NaHCO 3+ HCl arrow NaCl + underset(Z)CO 2+ H 2 O 2 NaOH + underset text (atmosphere) CO 2 arrow underset( Y ) Ca 2 Na 2+ H 2 O

	$X$	$Y$	$Z$
(a)	$N a H C O_{3}$	$N a_{2} C O_{3}$	$C O_{2}$
(b)	$N a_{2} C O_{3}$	$N a O H$	$C O_{2}$
(c)	$N a_{2} C O_{3}$	$N a H C O_{3}$	$C O_{2}$
(d)	$N a O H$	$N a H C O_{3}$	$C O_{2}$

a

b

c

d

(X)2NaHCO3​​→(Y)Na2​CO3​​+(Z)CO2​​+H2​O (X)NaHCO3​​+HCl→NaCl+(Z)CO2​​+H2​O 2NaOH+ (atmosphere) CO2​​→(Y)Ca2​​Na2​+H2​O

$(X) 2 N a H C O_{3} \to (Y) N a_{2} C O_{3} + (Z) C O_{2} + H_{2} O$
$(X) N a H C O_{3} + H Cl \to N a Cl + (Z) C O_{2} + H_{2} O$
$2 N a O H + (atmosphere) C O_{2} \to (Y) C a_{2} N a_{2} + H_{2} O$