Advertisements
Advertisements
Question
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name - a poisonous gas almost as heavy as air.
Advertisements
Solution
A poisonous gas almost as heavy as air is Carbon monoxide
RELATED QUESTIONS
State four differences between compounds and mixtures.
What are the advantages of chromatography?
Define: Molecule
Give reason: Graphite is used to make a lead of the pencils.
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
Higher Order Thinking Skills.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
Give the chemical formula for cane sugar.
