GK quiz 8th class sem I

Name the person who discovered electrons using the cathode ray experiment. He created the plum pudding model also.

• J J Thomson

• Rutherford

• Neil Bohr

• Sir James Chadwick

Name the discover of neutron

• J J Thomson

• Rutherford

• Neil Bohr

• Sir James Chadwick

A patient is diagnosed with a damage in the thyroid gland.Which isotope is used to treat the patient?

• Iodine -131

• Uranium -235

• Sodium-24

• Carbon- 14

Which is the most commonly used moderator in the nuclear reactor.

And other Phosphorus has 15 electrons. What is the valency of phosphorus?

• Three

• Five

• Two

• One

Which of the following is not a compound

• HCl

• Cl2

• NaCl

• CO2

A type of mixture where particles are larger than those in a solution but not having enough to settle out.

• Solution

• Colloid

• Suspension

The ability of solute to dissolve in a solvent is known as ___________.

What is the valency of Oxygen?

• One(1)

• Two(2)

• Three(3)

Which of the mixture is homogeneous mixture

• Suspension

• Solution

• Colloid