Short answer
- Define the following terms Element, compound, symbol, formula
- Give two points to show the difference between solids, liquids and gases.
- Give three points of distinction between a compound and a mixture.
- Give symbols of any five elements which start with a letter ’{C}’.
- Arrange the following substances in the increasing order of forces of attraction between the particles.Water, Sugar ,Oxygen
- Classify the following into elements, compounds and mixtures.air, milk, water, sugar, diamond , phosphorus
- Classify the following substances into homogeneous and heterogeneous mixtures. soda water, wood, air, soil, vinegar
- MCO3 is the formula of carbonate of a metal. What will be the formula of chloride and phosphate of the metal ?
Long answer type
- What is the effect of temperature and pressure on three states of matter ?
- Give the characteristics of mixtures and compounds.
- Illustrate by an experiment the difference between a compound and a mixture.
- How will you write a formula of a compound with the help of symbols and valencies of elements ? Illustrate with suitable example.
Give reasons for the following
- One can get a smell of perfume even from a distance.
- Gases do not have definite shape and volume.
- Liquids have definite volume but not a definite shape.
- Solids, generally have high density.
- Gases exert pressure.
English