S 1 CHEMISTRY

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Which state of matter has no definite shape but a definite size?
1. all of them
2. solid
3. liquid
4. gas
The luminous flame is not used in the laboratory because
1. it produces soot
2. it is yellow
3. it is very hot
4. it is unsteady
A non-luminous flame has…….zones.
1. 5
2. 2
3. 3
4. 4
Which one of the following is a property of physical change?
1. change in mass
2. new substance is formed
3. there is change in energy.
4. no new substance is formed
The particles in a gaseous state are:
1. far apart
2. very small
3. very close to each other
4. colourless
Which one of the following is a chemical change?
1. melting solid to liquid
2. magnetization of iron
3. evaporation of water
4. rusting of iron
Soot is more likely to be formed in a Bunsen burner flame when
1. the air hole is open and the gas supply off
2. the gas supply is turned on as low as possible
3. the air hole is closed
4. the air hole is open and the gas supply fully on
Which one of the following is a metal?
1. nitrogen
2. oxygen
3. silicon
4. zinc
When the air hole of a Bunsen burner is closed, the flame produced is
1. yellow in colour
2. blue in colour
3. very hot
4. non-steady
Which one of the following sublimes when heated?
1. water
2. chalk
3. Sodium
4. iodine
The chemical symbol for sodium is
1. So
2. No
3. Na
4. Sd
The force of attraction between particles of different kind is called:
1. Repulsion force
2. Cohesion
3. Adhesion force
4. Gravitational force
When a solid is heated, it changes to gas without passing through liquid state. This change of state is called
1. sublimation
2. condensation
3. Vaporization
4. distillation
An apparatus used for measuring volume of solution during titration is
1. conical flask
2. measuring cylinder
3. burette
4. spatula
The hottest part of the non-luminous flame is
1. green zone
2. yellow zone
3. brown zone
4. pale-blue or purple zone
The process by which water vapour is changed into dew is called
1. evaporation
2. sublimation
3. condensation
4. distillation
Which one of the following is a property of a chemical change?
1. new substance is formed
2. no new substance is formed
3. no change in mass
4. there is no change in energy
Which one of the following substances has the greatest kinetic energy?
1. Ice
2. Water vapour
3. Water
4. Salt
Which one of the following produces a non-luminous flame?
1. gas stove
2. electric bulb
3. Burning wood
4. candle
Matter exists in three states. In which state(s) does it have a definite volume and shape?
1. liquid and solid
2. gas
3. solid
4. liquid

S 1 CHEMISTRY

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