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प्रश्न
Explain by writing a word equation.
Respiration is a chemical change.
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उत्तर
Respiration is a continuously occurring biological process. In this process air is inhaled, oxygen present in this inhaled air reacts with glucose present in the cells of the body forming carbon dioxide and water. The word equation and the chemical equation of this chemical reaction are as follows: (Here, the chemical equation is not balanced.)
Word equation:
\[\ce{Glucose + Oxygen ->[respiration] Carbon dioxide + Water}\]
संबंधित प्रश्न
How do the following help in bringing about a chemical change?
pressure.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
FILL IN THE BLANK
Negatively charged ions are called ..........
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Mention the various conditions required for a chemical reaction to occur.
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
Rusting of iron is ______.
