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प्रश्न
Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.
उत्तर
Lead nitrate when reacts with sodium chloride insoluble white ppt. of lead chloride is formed
\[\ce{\underset{\text{colourless}}{Pb[NO3]2} + 2NaCl->\underset{\text{white ppt.}}{PbCl2 v} + 2NaNO3}\]
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संबंधित प्रश्न
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
FILL IN THE BLANK
A .............. change is a temporary change.
FILL IN THE BLANK
Negatively charged ions are called ..........
Fill in the blank.
Melting of ice is a _______ change.
Fill in the blank
A new substance is formed in a _______ change.
Define chemical reaction.
Explain,giving one example of the following chemical changes:
Reversible reaction
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
Name: A brown gas
Select the correct answer for the following options:
The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.
Name the following:
The type of change physical or chemical involved – ‘during respiration in human beings’.
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 balanced equation for the following conversion affected by heat alone on the substance:
Copper carbonate to copper oxide
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
Which of the following is not an “element + element → compound” type reaction?
Which of the following is a chemical change?
The chemical formula of rust is ______.
Write the characteristics of chemical change.
