Advertisements
Advertisements
प्रश्न
A chemical reaction is often accompanied by external indications or characteristics.
Advertisements
उत्तर
A chemical reaction is accompanied by a change in colour of reactants and products
APPEARS IN
संबंधित प्रश्न
Define electrolysis.
Explain the type of reactions on the basis of the direction of reaction.
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Give a chemical test to distinguish between the following gases.
CO2 and SO2
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.
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.
______ is the chemical name of rust.
