Advertisements
Advertisements
प्रश्न
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
Advertisements
उत्तर
| Heat on Zinc nitrate | Colour of residue | yellow - hot, white - cold (ZnO Residue zinc oxide) |
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
Balancing a chemical equation is based on
Give an example of a reaction where the following are involved
Electricity
When hydrogen burns in oxygen, water is formed; when electricity is passed through water, hydrogen and oxygen are given out. Name the type of chemical change involved in the two cases.
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
Give a word equation for the following reaction.
A compound which on heating shows – colour change from brown to yellow.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of water to quicklime.
Give a balanced equation for the conversion of an ammonium salt to a basic gas.
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
