Class 8th Science

Plasma can be considered as 'super energetic' state of matter. Which of the following items, which are found in your house, will show this 'plasma' state of matter?

• A tungsten bulb

• Gas in the packets of chips

• In the sun

• In the tubelight

The word 'polymerisation' can be related to:

• Iron

• Plastic

• Water

• Oxygen

Which of the following is a bad conductor of electricity?

• Solid NaCl

• Molten NaCl

• Vinegar

• Saline water

Which of the following can come under the category of ‘super low density’?

• Liquid

• Gas

• Plasma

• BEC

Which substance cannot be used to put out fires?

• CO₂ Gas

• Petrol

• Sand

• N₂ Gas

Which among the following is a dark coloured, viscous, strong smelling liquid?

• Kerosene

• Alcohol

• Petroleum

• All of these

The organic manure is:

• acidic in nature.

• basic in nature.

• neutral in nature.

• None of the above

In which of the following media does the sound travel with maximum speed?

• Liquids

• Solids

• Gases

• Equal in all the three

Fresh endometrium is formed every month in

• Utarus

• Uretus

• Uterus

• Uteris

Which of the following is not a force?

• Water in rivers flowing downwards.

• Density of an iron object.

• Tension of a rope.

• Air resistance against a moving bicycle.