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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
Define catalyst.
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
TRUE \ FALSE
Ammonia is a good oxidizing agent.
Fill in the blank
A new substance is formed in a _______ change.
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
What is a chemical reaction?
Give an example of the following chemical change.
Two gases combine to form white solid
Give reason for the following:
Silver nitrate solution is kept in coloured bottles.
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
Give a chemical test to distinguish between the following gases.
CO2 and SO2
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
What do you observe when CO2 is passed through lime water first and then a little in excess.
Give reason for the following:
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌}
between the reactants and products, formed in the chemical reaction.
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
______ is not a chemical change.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Write a word equation for the chemical change, if any.
How can we prevent rusting?
Acid rain is a result of ______.
