Advertisements
Advertisements
प्रश्न
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
Advertisements
उत्तर
Step 1: Write the symbols of the radicals.
K F
Step 2: Write the valency below the respective radical.
K F
1 1
Step 3: Cross-multiply symbols of radicals with their respective valency.
Step 4: Write down the chemical formula of the compound. KF
संबंधित प्रश्न
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Write true or false .
A black residue is formed when sugar is heated .
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
State the main characteristics of chemical reactions. Give at least one example in each case.
Give a chemical test to distinguish between the following gases.
H2 and CO2
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc carbonate to zinc oxide
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.
What is the difference between reactants and products?
