Advertisements
Advertisements
प्रश्न
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Water
Advertisements
उत्तर
Step 1: Write the symbols of the radicals.
H O
Step 2: Write the valency below the respective radical.
H O
1 2
Step 3: Cross-multiply symbols of radicals with their respective valency.
Step 4: Write down the chemical formula of the compound.
संबंधित प्रश्न
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
What are oxides ?
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
TRUE \ FALSE
Ammonia is a good oxidizing agent.
Explain the following reaction with one suitable example of Double decomposition reaction.
Name the type of chemical reaction shown by the following equation:
CaCO3 → CaO + CO2
Match the pairs.
| a. | Photosynthesis | i. | Tendency to lose electrons |
| b. | Water | ii. | Reactant in combustion process |
| c. | Sodium chloride | iii. | Chemical change |
| d. | Dissolution of salt in water | iv. | Covalent bond |
| e. | Carbon | v. | Ionic bond |
| f. | Fluorine | vi. | Physical change |
| g. | Magnesium | vii. | Tendency to form anion |
Give an example of the following chemical change.
A reaction where colour change is noticed
The chemical change is ______.
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.
What changes do you expect?
