Advertisements
Advertisements
प्रश्न
What kind of a change is associated with decaying of a plants?
Advertisements
उत्तर
Decaying plants is associated with slow change and chemical change.
APPEARS IN
संबंधित प्रश्न
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
Give a reason.
Wasp sting is treated with vinegar.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Sodium chloride
Define the following term:
Precipitate
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
What do you understand by precipitation reaction? Explain with examples.
State the main characteristics of chemical reactions. Give at least one example in each case.
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
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 coloured substance which leaves on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to calcium carbonate.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Calcium hydroxide.
What happens when cane sugar is strongly heated? Mention any two changes in it.
The changes in which new substance with new chemical properties are formed are ______.
Write a note on the following:
Fermentation
______ is a chemical substance is used in whitewashing.
