CBSC Session 2022-23.
Sample Papers of Class 10th, Science.
NCERT Important Questions of Class 10th Science.
NCERT Science Solutions of Class 10th.
NCERT book extra Questions.
CBSC Board and other State board.
Important MCQ Science Questions of Class 10th.
List two observations which you make when you add a pinch of sodium hydrogen carbonate to acetic acid in a test tube. Write chemical equation for the reaction that occurs.
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(l) Brisk effervescence
(ii) Evolution of a colourless gas
NaHCO3 + CH3COOH ——- CH3COONa + H2O + CO2