List of practice Questions

Which of the following organ represents the male reproductive organ in plants?
Which of the following is/are called environment-friendly practice(s)?
At what distance should an object be placed from a concave mirror of focal length 10 cm, so that a real image 5 times larger is formed? Also, find the position of the image.
The focal length of a convex lens is 50 cm. State the position of the image of an object placed at a distance of 25 cm, perpendicularly on its axis. Also, determine the magnification of the image.
Which of the following is an amphoteric oxide?
Chemical formula of propane is:
Reproduction in Hydra occurs by:
The process of breakdown of pyruvate takes place in:
The kidneys in human beings are a part of which system?
Mendel got his primary education in:
The filament in an electric bulb is made of:
The transformation in an electric cell is:
In the chemical reaction, $2 FeCl_3 + 2 H_2O + Y \rightarrow 2 FeCl_2 + H_2SO_4 + 2 HCl$, Y is:
Which of the following is an acidic salt?
Matte mainly consists of:
Complete the following chemical equation:
________ + PCl5 → CH3COCl + POCl3 + HCl
The image of an object placed between the pole and the focus of a concave mirror is formed:
Which lens is used in correcting the defect of long-sightedness (far-sightedness)?
The magnification of the virtual image of an object placed at a distance of 0.2 m from the lens is 0.5. The lens will be:
When white light passes through a prism of glass, the colour of a light ray bent maximum towards the base of the prism is:
Two wires of resistances $R_1$ and $R_2$ are joined in parallel. Their equivalent resistance will be:
What do you mean by sex chromosomes? Explain the process of sex determination in humans.
Write a short note on valency of carbon.
Write the chemical name and molecular formula of baking powder. What happens when baking powder is heated?
How can the three resistances 2 Ω, 3 Ω, and 6 Ω be connected, so that (i) total resistance of 4 Ω is obtained, and (ii) total resistance of 1 Ω is obtained?