Advertisements
Advertisements
प्रश्न
What happens when cane sugar is strongly heated? Mention any two changes in it.
Advertisements
उत्तर
- Sugar is basically Sucrose.
- The molecular formula of Sugar is C12 H22O11 (or) C12(H2O)11.
- When sugar is heated, it loses all water molecules and decomposes to carbon.
- Chemical change;
- Irreversible change
APPEARS IN
संबंधित प्रश्न
The chemical name of baking soda is ______.
Define electrolysis.
Define chemical reaction.
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Explain the following reaction with one suitable example of Displacement reaction.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Water
Give an example of the following chemical change.
Two solids combine to form a liquid
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
Give a chemical test to distinguish between the following gases.
CO2 and SO2
Select the correct answer for the following options:
The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.
Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
What is a chemical reaction?
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
What kind of a change is associated with decaying of a plants?
Burning of paper is the best example of ______ change.
Classify the following processes into physical or chemical changes:
- Beating of aluminium metal to make aluminium foil.
- Digestion of food.
- Cutting of a log of wood into pieces.
- Burning of crackers.
The chemical name of baking soda is sodium bicarbonate.
Write the chemical reaction of baking soda with lemon.
