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प्रश्न
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Water
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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
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
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
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
State the conditions necessary for a chemical change or reaction.
Define a photochemical reaction.
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc carbonate to zinc oxide
Assertion (A): Cutting paper into very small pieces is an irreversible change.
Reason (R): Physical changes are always reversible.
