Advertisements
Advertisements
प्रश्न
State the original colour of the following substance and colour of residue obtained after heating.
Ammonium dichromate
Advertisements
उत्तर
Ammonium dichromate is a bright orange-red crystalline solid. It is readily ignited and burns to produce a voluminous green residue.
APPEARS IN
संबंधित प्रश्न
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
Give a reason.
Wasp sting is treated with vinegar.
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
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
Give a word equation for the following reaction.
A compound which on heating shows – colour change from brown to yellow.
Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
What is the role of a catalyst in a chemical reaction?
Why is spoiling food a chemical change?
______ is the chemical name of limestone.
