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प्रश्न
Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
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उत्तर
Glucose and Oxygen.
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संबंधित प्रश्न
How do the following help in bringing about a chemical change?
pressure.
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Explain by writing a word equation.
Hard water gets softened on mixing with a solution of washing soda.
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Name: Gas with rotten egg smell.
Give a chemical test to distinguish between the following gases.
H2 and CO2
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper nitrate to nitrogen dioxide
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Give a suitable example with an equation to show the representation of 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.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
The chemical change is ______.
Limestone contains ______ mainly.
Mention the various conditions required for a chemical reaction to occur.
The changes in which new substance with new chemical properties are formed are ______.
What is the use of indicator?
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
Write a note on the following:
Fermentation
What is the difference between reactants and products?
