What are X, Y, Z in the following reactions? X Y Z (a) H2SO4, 443 K 85 % H3PO4, 440 K 20 % H3PO4, 358 K (b) 85 % H 3 PO 4, 440 K H2SO4, 443 K 20 % H3PO4, 358 K (c) 20 % H3PO4, 358 K H2SO4, 443 K 85 % H3PO4, 440 K (d) H2SO4, 443 K 20 %, H3PO4, 358 K 85 % H3PO4, 440 K

Question

What are X, Y, Z in the following reactions?

X Y Z (a) H2SO4, 443 K 85 % H3PO4, 440 K 20 % H3PO4, 358 K (b) 85 % H 3 PO 4, 440 K H2SO4, 443 K 20 % H3PO4, 358 K (c) 20 % H3PO4, 358 K H2SO4, 443 K 85 % H3PO4, 440 K (d) H2SO4, 443 K 20 %, H3PO4, 358 K 85 % H3PO4, 440 K (A) a (B) b (C) c (D) d

Tardigrade Admin · Accepted Answer

CH3CH2OH ->[H2SO4 (Y)][443 K] CH2=CH2+H2O

These reactions are known as dehydration reactions where H 3 PO 4 and H 2 SO 4 are dehydrating agents. Ethanol undergo dehydration by heating with conc. H 2 SO 4 at 443 K whereas 2° alcohols by 85 % H 3 PO 4 at 440 K and 3° alcohols by 20 % H 3 PO 4 at 358 K.

	X	Y	Z
(a)	$H_{2} S O_{4}, 443 K$	$85% H_{3} P O_{4}, 440 K$	$20% H_{3} P O_{4}, 358 K$
(b)	$85% H_{3} P O_{4}, 440 K$	$H_{2} S O_{4}, 443 K$	$20% H_{3} P O_{4}, 358 K$
(c)	$20% H_{3} P O_{4}, 358 K$	$H_{2} S O_{4}, 443 K$	$85% H_{3} P O_{4}, 440 K$
(d)	$H_{2} S O_{4}, 443 K$	$20%, H_{3} P O_{4}, 358 K$	$85% H_{3} P O_{4}, 440 K$

Q. What are X,Y,Z in the following reactions? X Y Z (a) H2​SO4​,443K 85%H3​PO4​,440K 20%H3​PO4​,358K (b) 85%H3​PO4​,440K H2​SO4​,443K 20%H3​PO4​,358K (c) 20%H3​PO4​,358K H2​SO4​,443K 85%H3​PO4​,440K (d) H2​SO4​,443K 20%,H3​PO4​,358K 85%H3​PO4​,440K

a

b

c

d