English Medium कक्षा ९ - CBSE Question Bank Solutions

In the atom of an element X, 6 electrons are present in the outermost shell. If it acquires noble gas configuration by accepting requisite number of electrons, then what would be the charge on the ion so formed?

Match the names of the Scientists given in column A with their contributions towards the understanding of the atomic structure as given in column B

The atomic number of calcium and argon are 20 and 18 respectively, but the mass number of both these elements is 40. What is the name given to such a pair of elements?

Helium atom has 2 electrons in its valence shell but its valency is not 2, Explain

An element X has a mass number 4 and atomic number 2. Write the valency of this element?

Draw a neat labelled diagram of an animal cell

Draw a neat diagram of plant cell and label any three parts which differentiate it from animal cell.

Real organs are absent in

Define the terms and give one example

Coelom

Name the process associated with the following

A fine beam of light entering through a small hole in a dark room illuminates the particles in its paths.

An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?

Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture

Two or more coloured constituents are soluble in some solvent.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

Name a non-metal other than carbon that shows allotropy.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

Name a non-metal which is required for combustion.

Classify the substances given in Fig. 2.2 into elements and compounds

Living cells were discovered by

Name any cell organelle which is non membranous.

Name the organelles which show the analogy written as under

Control room of the cell——

One of the following is not an Annelid

Which among the following have an open circulatory system?

1. Arthropoda
2. Mollusca
3. Annelida
4. Coelenterata