Advertisements
Advertisements
Question
A chemical change may involve –
Options
change in colour only
change in temperature only
evolution of gas only
any or all of the above
Advertisements
Solution
any or all of the above
Explanation:
A chemical change may involve a change in colour, temperature, smell or evolution of gas, heat, etc.
APPEARS IN
RELATED QUESTIONS
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
A chemical equation is a statement that describes a chemical change in terms of
Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
Mention the various conditions required for a chemical reaction to occur.
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.
What is the use of indicator?
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings
