Two indefinite characteristics of gases are

  • volume and surface area
  • volume and mass
  • surface area and mass
  • volume and shape

For combustion, the required gas is

  • carbon dioxide
  • nitrogen
  • hydrogen
  • oxygen

Mixing of iron and sulphur together brings

  • chemical change
  • physical change
  • biological change
  • organic change

Ammonia is made by mixing two gases. These gases are

  • nitrogen and hydrogen
  • nitrogen and oxygen
  • nitrogen and methane
  • methane and oxygen

The change of shape of liquid according to the shape of container is due to

  • space between particles
  • collision of particles
  • movement of particles
  • force of attraction between particles

Melting point of 'sulphur' is

  • 113 °C
  • 311 °C
  • both
  • none

To separate the molecules of ethene dichloride, the compound is

  • heated lightly
  • heated gently
  • heated strongly
  • heated for a long time

For security and military purpose, ammonia is used in

  • explosives
  • bullets
  • flash bangs
  • tear gas shells

If there is lack of nitrogen in soil, plants turn

  • red
  • orange
  • blue
  • to be stunted

In liquids the intermolecular force of attraction is equal to

  • potential energy
  • kinetic energy
  • thermal energy
  • nuclear energy

By heating the color of mixture of sulphur and iron which is yellow turns to

  • black
  • brown
  • dark grey
  • white

Polyvinyl chloride is a

  • metal
  • plastic
  • metalloid
  • gas

In liquids the force of attraction between particles is

  • weaker than gases
  • stronger than gases but weaker than solids
  • stronger than solids but weaker than gases
  • stronger than solids and gases

Burning hydrocarbons produce

  • water
  • carbon dioxide
  • water and carbon
  • water and carbon dioxide

The regular arrangement of particles is found in

  • solids and liquids
  • liquids
  • solids
  • gases

Hydrogen is obtained by

  • reaction of methane
  • reaction of water
  • combustion of methane
  • boiling of water

When the state of matter is changed from liquid to gas, we call it

  • melting
  • freezing
  • boiling
  • condensing

Particles are packed closely and tightly in

  • solids
  • semi solids
  • liquids
  • gases

Wood is a

  • fuel
  • alkane
  • alkene
  • coal

When gas is cooled down, it changes its state into liquid. This is called

  • melting
  • freezing
  • condensation
  • sublimation

Polythene was discovered in

  • 1733
  • 1833
  • 1933
  • 1633

When methane is combusted, it produces

  • carbon dioxide and water
  • carbon dioxide and hydrogen
  • oxygen and hydrogen
  • nitrogen and oxygen

PVC sheets are also used to make

  • umbrellas
  • chimneys
  • rain coats
  • water proof bags

The vibration of particles in solids at fixed position is due to

  • kinetic energy
  • potential energy
  • force of attraction
  • pressure on atoms

The strongest force of attraction is found in

  • fluids
  • liquids
  • gases
  • solids

Solids that flow like liquids are

  • glass
  • plastic
  • gel
  • all of above

The odour of ammonia is

  • sweet
  • attractive
  • weak
  • strong and pungent

Long chain of atom is linked by

  • hydrogen
  • oxygen
  • nitrogen
  • carbon

To make PVC, molecules of vinyl chloride are

  • condensed
  • further heated
  • treated with ammonia
  • gathered to form a chain

When particles cool down, energy changes

  • from kinetic to heat
  • from kinetic to potential
  • from potential to kinetic
  • from thermal to potential
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