Science

1) which is the electric device for load?

• Magnet

• Bell of the cycle

• Bulb

• Cell

A pure substance which cannot be changed into another substance.

• a) element

• b) compound

• c) matter

• d) mixture

Which compound is used to remove bad smelling and kill roots of plant?

• Detergent

• Iodine

• Phenol

• Dettol

The outer most part of animal cell is...

• Cell wall

• Cell membrane

• Nucleus

• Cytoplasm

What difference is observed in brightness of the bulb when cells are added in series combination ?

• Decrease in brightness

• Increase in brightness

• Remains constant

• Nothing happens

Which of the following is not a artifical magnet?

• Compass

• Bar magnet

• Loadstone

• Electromagnet

What is the value of sound in water ?

• 1500m/s

• 332m/s

• 5200m/s

• 5800m/s

In which object regular reflection takes place?

• White paper

• Table

• Blackboard

• Plane mirror

Why is an object seen?

• Reflection of light

• Blocking of light

• Colourful object

• Passing through the object

What is the boiling point of mercury?

• 39 degree centigrade

• 357 degree centigrade

• 212 degree centigrade

• 100 degree centigrade