English Medium इयत्ता ९ - CBSE Question Bank Solutions

Which separation technique will you apply for the separation of the following?

Different pigments from an extract of flower petals.

How many atoms are present in a PO₄³⁻ ion?

What are polyatomic ions? Give examples.

Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.

(Hint: The mass of an ion is the same as that of an atom of the same element. Atomic mass of Al = 27 u)

Write the distribution of electrons in carbon and sodium atoms?

If K and L shells of an atom are full, then what would be the total number of electrons in the atom?

Summarize the rules for writing of distribution of electrons in various shells for the first eighteen elements.

Na⁺ has completely filled K and L shells. Explain.

Which one of the following is a correct electronic configuration of sodium?

Name the tissue responsible for movement in our body.

Give three features of cardiac muscles.

Diagrammatically, show the difference between the three types of muscle fibres.

What is the specific function of the cardiac muscle?

Differentiate between striated, unstriated and cardiac muscles on the basis of their structure and site/location in the body.

What is immunisation?

What are the immunisation programmes available at the nearest health centre in your locality? Which of these diseases are the major health problems in your area?

How many times did you fall ill in the last one year? What were the illnesses?

(a) Think of one change you could make in your habits in order to avoid any of /most of the above illnesses.

(b) Think of one change you would wish for in your surroundings in order to avoid any of/most of the above illnesses.

A doctor/nurse/health-worker is exposed to more sick people than others in the community. Find out how she/he avoids getting sick herself/himself.

Conduct a survey in your neighbourhood to find out what the three most common diseases are. Suggest three steps that could be taken by your local authorities to bring down the incidence of these diseases.

A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out

(a) that the baby is sick?

(b) what is the sickness?