English Medium Class 9 - CBSE Question Bank Solutions for Science

Goldstein's experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of :

There are two species represented as ³⁵Cl and ³⁷Cl. Which of the following statement is correct regarding these species ?

Name the gas which produces anode rays consisting of protons in the discharge tube experiment.

Is it possible for the atom of an element to have one electron, one proton and no neutron. If so, name the element.

In response to a question, a student stated that in an atom, the number of protons is greater than the number of neutrons, which in turn is greater than the number of electrons. Do you agree with the statement? Justify your answer.

Complete the Table on the basis of information available in the symbols given below

1. `""_17^35"Cl"`
2. `""_6^12"C"`
3. `""_35^81"Br"`

While doing work and running, you move your organs like hands, legs, etc. Which among the following is correct?

Match the column (A) with the column (B)

Differentiate between meristematic and permanent tissues in plants

Name any two simple and two complex permanent tissues in plants.

Pteridophyta do not have

Who introduced the system of scientific nomenclature of organisms

Write true (T) or false (F)

Whittaker proposed five kingdom classification.

______ are called as amphibians of the plant kingdom.

Five kingdom classification of living organisms is given by ______.

Basic smallest unit of classification is ______.

Which of the following figures (Fig. 8.3) represents uniform motion of a moving object correctly?

Smoke and fog both are aerosols. In what way are they different?

The teacher instructed three students ‘A’, ‘B’ and ‘C’ respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). ‘A’ dissolved 50g of NaOH in 100 mL of water, ‘B’ dissolved 50g of NaOH in 100g of water while ‘C’ dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?

Name the process associated with the following

A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring.