Advertisements
Advertisements
प्रश्न
A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?
उत्तर
In this case, the changes cannot be reversed. This is because the cement that hardens up after getting wet cannot be obtained back.
APPEARS IN
संबंधित प्रश्न
Balancing a chemical equation is based on
Explain the following reaction with one suitable example of Decomposition reaction
Explain the following reaction with one suitable example of Displacement reaction.
Multiple choice:
Thermal decomposition of sodium carbonate will produce
Name: Two carbonates do not produce carbon dioxide on heating.
What is a chemical reaction?
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
