Advertisements
Advertisements
प्रश्न
Distinguish by heating the following in dry test tubs.
Ammonium Chloride and iodine.
Advertisements
उत्तर
| Ammonium Chloride | Iodine | |
| Residue left | No residue | No residue |
| Colour of residue | The colour of the residue is white sublimate. | The colour of the residue is Violet sublimate. |
| Gas produced | Hydrogen chloride and ammonia gas are produced.(HCl + NH3) | Iodine vapours are produced. |
APPEARS IN
संबंधित प्रश्न
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
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
A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.
Explain the term reactant and product giving examples.
Write the chemical reaction where the following changes are observed.
Gas is evolved
Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
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 dilute hydrochloric acid to silver nitrate.
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
______ is the chemical name of rust.
