Which one of the following substances has the greatest kinetic energy?
- Water
- Water Vapour
- Salt
- Ice
The luminous flame is not used
- it is yellow
- it is very hot
- it is unsteady
- it produces soot
The hottest part of the non-luminous flame is
- pale-blue or purple zone
- brown zone
- yellow zone
- green zone
When a solid is heated, it changes to gas without passing through liquid state. This change of state is called
- Vaporization
- sublimation
- distillation
- condensation
An apparatus used for measuring volume of during titration is
- burette
- conical flask
- spatula
- measuring cylinder
The process by which water vapour is changed into dew is called
- distillation
- evaporation
- condensation
- sublimation
When the air hole of a bunsen burner is closed, the flame produced is
- it is steady
- blue in colour
- yellow in colour
- very hot
Matter exists in three states. In which state(s) does it have a definite volume and shape?
- Solid
- Liquid
- gas
- liquid and solid
Soot is more likely to be formed in a Bunsen burner flame when
- the air hole is open and the gas supply fully on
- the gas supply is turned on as low as possible
- the air hole is closed
- the air hole is open and the gas supply off
Which one of the following sublimes when heated?
- iodine
- Sulphur
- water
- chalk
A non-luminous flame has .................... zones
- 2
- 3
- 4
- 5
The particles in a gaseous state are:
- very close to each other
- far apart
- very small
- colourless
Which on uof the following produces a non-luminous flame?
- Burning wood
- electric bulb
- gas stove
- candle
The force of attraction between particles of idifferent kind is called
- Adhesion force
- Repulsion force
- Cohesion
- Gravitational force