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Chemistry CBSE Live product
Class 10
Chemical reaction and equations
Annual Revision III - Chemical reactions and equations
1.
Introduction to chemical reactions
Question:
2
m.
Choose the correct answer:
1.
When the aqueous solution obtained from \(MgO\) is tested with litmus, the red litmus turns blue. This confirms:
\(MgO\) is acidic
\(Mg(OH)_2\) is unstable
\(Mg(OH)_2\) is basic
\(MgO\) is neutral
2.
What is the evidence for evolution of gas in the \(Zn + HCl\) reaction?
Zinc deposits at the bottom
Flask becomes cold
Bubbles appear inside the flask
Solution becomes green
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