English Medium Class 9 - CBSE Question Bank Solutions for Science

A mixture of chloroform and water are taken in a separating funnel is mixed and left undisturbed for some time. The upper layer in the separating funnel will be of ______ and the lower layer will be that of ______.

A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called ______.

Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. Will it be a pure substance or a mixture? Give reasons for the same.

Can we separate alcohol dissolved in water by using a separating funnel? If yes, then describe the procedure. If not, explain.

Under which category of mixtures will you classify alloys and why?

You are provided with a mixture containing sand, iron filings, ammonium chloride and sodium chloride. Describe the procedures you would use to separate these constituents from the mixture?

A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to

A horse continues to apply force in order to move a cart with a constant speed. Explain why?

A truck of mass M is moved under a force F. If the truck is then loaded with an object equal to the mass of the truck and the driving force is halved, then how does the acceleration change?

When a body falls freely towards the earth, then its total energy

Which one of the following is not the unit of energy?

The work done on an object does not depend upon the

The weight of a person on planet A is about half that on the earth. He can jump up to 0.4 m in height on the surface of the earth. How high he can jump on planet A?

A ball is dropped from a height of 10 m. If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back? (g = 10 m s^–2)

Which one of the following is not a bacterial disease?

Which one of the following diseases is caused by protozoans?

Which of the following can make you ill if you come in contact with an infected person?

Which one of the following is not important for individual health?

Choose the wrong statement

You are aware of Polio Eradication Programme in your city. Children are vaccinated because