Advertisements
Advertisements
Question
Explain the following observations very briefly
An empty glass in fact is not empty.
Solution
In an empty glass there is always air present which covers up the space therefore, it cannot be said empty. Air is transparent, weightless and doesn’t have a definite shape or volume, thus, we cannot see it
APPEARS IN
RELATED QUESTIONS
Answer the question put against the following constituents of air :
Carbon dioxide : “Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air.” Support this statement with relevant facts.
Complete and balance the following chemical equation.
CaO + H2O → ____________
Complete and balance the following equation
CaO + H2O →
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The mesosphere in the atmosphere, contains most of the air, fit for respiration
Of the total volume of air – 4/5th is nitrogen. State the utility or consequence of this ratio.
______ is the percentage of nitrogen in air.
Nitrogen is used in the food packaging industry because it _____.
Nitrogen is essential for burning.
Assertion: Carbon dioxide occurs as carbonates in nature.
Reason: Carbon dioxide can exist as a liquid at atmospheric pressure.
