Advertisements
Advertisements
प्रश्न
Why does a lump of cotton wool shrink in water?
Advertisements
उत्तर
A lump of cotton wool shrinks when immersed in water. This is because air present in the cotton wool escapes. Thus, the volume of the cotton wool decreases.
संबंधित प्रश्न
Classify Calcium oxide. Also give a balanced equation to prepare it.
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
Give reason:
A burning candle stops burning if covered with a glass tumbler
Complete the statement given below by filling in the blank with the correct word from the words given
___________is an example of a pollutant present in the air.
Name the following:
The active component of air which supports combustion and is used up in burning
Solvay process is a method to manufacture
Carbon dioxide with water changes
How will you show that air is dissolved in water?
Metals like magnesium, iron, and sodium burn in oxygen and give basic ______.
Observe the picture given in Fig. carefully and answer the following questions.
Why is he putting a cover on his nose?
