NCERT Class XI Chemistry The p-Block Elements Solutions
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Question : 32
Total: 38
Give one method for industrial preparation and one for laboratory preparation of CO and C O 2
Solution:
Preparation of CO :
Lab method : Pure CO is prepared by dehydration of formic acid or oxalic acid with concentratedH 2 S O 4
HCOOH
H 2 O
Industrial method : CO is prepared by the passage of steam over hot coke. The mixture of CO andH 2
C ( s ) + H 2 O ( g )
When air is used instead of steam, a mixture of CO andN 2
2 C ( s ) + O 2 ( g ) + N 2 ( g )
Preparation ofC O 2
Lab method : In the laboratory it is conveniently prepared by the action of dilute HCl on calcium carbonate.
C a C O 3 ( s ) + 2 H C l ( a q ) C a C l 2 ( a q ) + C O 2 ( g ) + H 2 O ( l )
Industrial method : When lime is manufactured by the calcination of limestone( C a C O 3 )
C a C O 3 C a O + C O 2
Lab method : Pure CO is prepared by dehydration of formic acid or oxalic acid with concentrated
HCOOH
Industrial method : CO is prepared by the passage of steam over hot coke. The mixture of CO and
When air is used instead of steam, a mixture of CO and
Preparation of
Lab method : In the laboratory it is conveniently prepared by the action of dilute HCl on calcium carbonate.
Industrial method : When lime is manufactured by the calcination of limestone
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