HARD
10th CBSE
IMPORTANT
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Write the various characteristics of chemical reactions.

Important Questions on Chemical Reactions and Equations

MEDIUM
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 1 - Chemical Reactions and Equations>Practice Questions Set>Q 3
State one difference between a physical and a chemical change.
MEDIUM
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 1 - Chemical Reactions and Equations>Practice Questions Set>Q 4
Justify that the burning of a candle involves both physical and chemical changes.
MEDIUM
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 1 - Chemical Reactions and Equations>Practice Questions Set>Q 5

What happens when a pinch of sodium carbonate is added to dilute hydrochloric acid?

HARD
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 1 - Chemical Reactions and Equations>Practice Questions Set>Q 6
State two characteristics of the chemical reaction that takes place when diluting hydrochloric acid react with zinc granules.
HARD
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 1 - Chemical Reactions and Equations>Practice Questions Set>Q 7
What do you observe when potassium iodide solution is added to lead nitrate solution? Write the reaction involved.
HARD
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 1 - Chemical Reactions and Equations>Practice Questions Set>Q 8
What are exothermic and endothermic reactions? Give one example of each. 
MEDIUM
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 1 - Chemical Reactions and Equations>Practice Questions Set>Q 9
Is the decomposition of vegetable matter into compost an endothermic reaction?
MEDIUM
10th CBSE
IMPORTANT
New Millenium Science - Chemistry Class X>Chapter 1 - Chemical Reactions and Equations>Practice Questions Set>Q 10

Classify the burning of LPG is an endothermic and exothermic reaction.