English Medium इयत्ता १० - CBSE Important Questions for Science

A spatula full of sodium carbonate is taken in a test tube and 2 mL of dilute ethanoic acid is added to it.

Write a chemical equation for the reaction.

The number of single and double bonds present in a molecule of benzene (C₆H₆) respectively, are ______.

A spatula full of sodium carbonate is taken in a test tube and 2 mL of dilute ethanoic acid is added to it.

Suggest a method of testing the gas liberated in the reaction.

Name the oxidising agent used in the conversion of ethanol to ethanoic acid.

Write the chemical equation for the ethanol to ethanoic acid of an oxidation reaction.

How is ethanol to ethanoic acid an oxidation reaction different from the reaction in which ethanol burns in the presence of oxygen?

What is haemoglobin? State the consequences of deficiency of haemoglobin in our bodies. 

What is the purpose of making urine in the human body?

Name the organs that store and release the urine.

What is the role of the brain in reflex action?

Name the function of cerebrum.

List in tabular form two differences between reflex action and walking. 

List in tabular form three distinguishing features between cerebrum and cerebellum.

How is the mode of action in beating of the heart different from reflex actions? Give four examples.

Sensory nerve of a reflex arc carries information from the receptor cells to the ______.

We are advised to take iodised salt in our diet by doctors. Justify its importance in our bodies.

A doctor has advised Sameer to reduce sugar intake in his diet and do regular exercise after checking his blood test reports. Which disease do you think Sameer is suffering from? Name the hormone responsible for this disease and the organ producing the hormone.

Why have reflex arcs evolved in animals? 

Name the parts labelled as A, B, C and D in the diagram given below:-

(i) Name the part marked 'A' in the diagram.

(ii) How dose 'A' reachese part 'B'?

(iii) State the importance of the part 'C'.

(iv) What happens to the part marked 'D' after fertilisation is over?