Advertisements
Advertisements
प्रश्न
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
उत्तर
Solid residual product of thermal decomposition of:
| Zinc carbonate | \[\ce{\underset{\text{Zinc oxide}}{ZnO}}\] | White |
APPEARS IN
संबंधित प्रश्न
How would you show that setting of curd is a chemical change?
How do the following help in bringing about a chemical change?
catalyst .
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
What are oxides ?
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
FILL IN THE BLANK
Negatively charged ions are called ..........
FILL IN THE BLANK
The new substances formed during a chemical reaction are called the ..................
What are biocatalysts ?
Write true or false .
A black residue is formed when sugar is heated .
What is a chemical change? Give two examples of chemical change?
Complete and balance the following reaction:
Pb(NO3)2 + KI →
Name: Two nitrates that do not produce nitrogen dioxide on heating.
Give a chemical test to distinguish between the following gases.
HCl and H2S
Give balanced equation for the following conversion affected by heat alone on the substance:
Hydrated copper sulphate to sulphur dioxide
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
The chemical change is ______.
Give two examples for each of the following cases:
Chemical changes.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Write the chemical reaction of baking soda with lemon.
When carbon dioxide is passed through lime water ______.
