Advertisements
Advertisements
Question
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Advertisements
Solution
During a chemical reaction transfer of energy takes place.
APPEARS IN
RELATED QUESTIONS
TRUE \ FALSE
Copper can displace iron from iron sulphate.
TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
Fill in the blank.
Melting of ice is a _______ change.
Fill in the blank:
The substances which undergo chemical change are called _______
A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.
Give an example of a reaction where the following are involved
Pressure
Define an electrochemical reaction.
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
State the original colour of the following substance and colour of residue obtained after heating.
Ammonium dichromate
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
Give a word equation for the following reaction.
A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc carbonate to zinc oxide
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Copper nitrate.
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
______ change results in the change of the substance.
Write the chemical reaction of baking soda with lemon.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
