List of practice Questions

Which of the following is the imaginary (virtual) image formed in a convex mirror?
Which of the following is the mirror formula?
How does a virtual image look like?
Which of the following is a magnifying glass?
The chemical formula of bleaching powder is
The ratio of HCl and HNO$_3$ in aqua regia is
What is the meaning of biological evolution?
What is the role of decomposers in the ecosystem?
Draw a neat labelled diagram of the respiratory organs of human being.
Write the functions of liver.
What are the benefits of a dam?
Explain the importance of pH in daily life.
What should be done for water conservation and water management?
Write four main characteristics of living beings.
Why does continuous running cause cramps to a person’s muscles?
What is the importance of blood platelets?
Write the names of some excretory substances of plants.
Write the names of endocrine glands found in humans.
Describe a method to find the focal length of a convex lens.
Why does the colour of the solution change when a piece of iron is added to copper sulphate solution?
Why is it necessary to keep the plaster of Paris away from moisture? Explain.
What are acids? Give any two examples. Explain the effect of an acid on an indicator.
Why is sodium metal kept immersed in kerosene?
Which metallic property does graphite exhibit despite being a non-metal?
What are aliphatic compounds?