Subject :NSO Class : Class 7
Observe the given reaction sequence carefully.
Acetic acid + Sodium hydrogen carbonate
(i)
(i) + Ca(OH)2
(ii) + Water
What could (i) and (ii) be?
| (i) | (ii) | |
| A | CaCO3 | CO2 |
| B | H2O | CaCO3 |
| C | CO2 | CaCO3 |
| D | H2O | CO2 |
Question is incomplete
Ans 1:
Class : Class 7
Should have given (i) plus water plus sodium acetate, just giving (i) makes it a lot more confusing and makes the second reaction a guessing game. Question should have been framed better.
Ans 2:
Class : Class 8
No, it's not... it is just made quite tricky! the answer is C.
It asks two question simultaneously: 1. vinegar plus baking soda evolves which gas? 2. What is formed when CO2 reacts with lime water?
Hope u know their answers!! ;)
Ans 3:
Class : Class 6