Advertisements
Advertisements
प्रश्न
Complete and balance the following chemical equations
NaCI + `AgNO_3` `→`
Advertisements
उत्तर
NaCI + `AgNO_3` `→` AgCI + `NaNO_3`
APPEARS IN
संबंधित प्रश्न
Give reason.
Acidic soil is treated with quick lime.
FILL IN THE BLANK
........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.
Define electrolysis.
Write true or false .
A black residue is formed when sugar is heated .
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 + Cu
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
What do you understand by 'chemical reaction'?
Give one example electrochemical reaction.
What do you observe when H2S is passed through a lead nitrate solution.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
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.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to calcium carbonate.
Chemical change is a temporary change.
A chemical change may involve –
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think formation of rust from iron is a chemical change?
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Explain how the painting of an iron gate prevents it from rusting.
Both CO2 and H2 gases are ______.
