List of practice Questions

Define ecosystem and describe its various biotic components with examples.

Which of the following metals is not in solid state at room temperature?

Reaction between acid and base gives:

Write balanced equations for the following reactions:

Write short notes on the following:

Which one of the following is formed inside the anther?

Reproductive organ of flower is:

Atmospheric ozone layer protects the Earth from:

A convex mirror of radius of curvature 4 meters is attached to a motor-bike to watch any other vehicle coming from behind. Calculate the location and position of the image of a vehicle which is 8 meters behind the bike at the time, as seen in the mirror.

A person suffering from short-sightedness can see up to 80 meters. Calculate the nature and focal length of the lens to correct his vision so that he may see the objects at infinite distance.

What is the Fleming's left-hand rule? On which factors does the force acting on a current-carrying conductor depend when placed in a magnetic field?

Solution having zero pH is:

Which of the following compound is formed by combining \(CO_2\) and \(H_2O\) in the presence of sunlight and chlorophyll?

Which of the following compounds is used to complete the following chemical equation?
\[ CH_3COONa + \_\_\_\_\_\_ \xrightarrow{CaO} CH_4 + Na_2CO_3 \]

Function of phloem in plants is:

In humans, digestion starts with which organ?

Which of the following is a plant hormone?

Growth hormone is secreted by the:

The speed of light is maximum in:

If three resistors of different values of resistance are connected in a series combination, then all of them will definitely have the same value of:

In an electrical circuit, the unit of potential difference between the ends of a resistance is:

In a magnetic field, the direction of the force acting on a current-carrying conductor perpendicular to the field is:

General formula of alkanes is: