List of top Science Questions

Gastric glands are present in:
In order to protect the forest wealth, the famous "Chipko Movement" was organized by local people in:
Alkali metal among the following is:
Match the compounds given in Column A with their examples in Column B.
Alkali metals are:
The reaction \( \text{Zn} + \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + \text{H}_2 \) is a:
Common name for \( \text{Na}_2\text{CO}_3 \) is:
The general formula for alkyne is:
The water and minerals absorbed by roots are transported in plants by:
A light ray passing through the centre of curvature of a concave mirror is incident on the mirror surface. The value of the angle of reflection will be:
A light ray passes through a point inside a lens without any deviation. That point of the lens will be its:
A person having normal eye can clearly see an object, if the distance of the object from the eye is:
Focal lengths of both a spherical mirror and a lens are -25 cm. Most probably the mirror and lens are:
In a circuit, keeping potential difference constant, resistance in the circuit is tripled. Current in the circuit will become:
In a house, electricity is supplied at 200 volts. Two electric bulbs of resistance 100 \(\Omega\) and 200 \(\Omega\) are used daily in the house for 1 hour. Daily consumption of electric power is:
In an electrical circuit, three resistances of 2 \(\Omega\), 4 \(\Omega\) and 6 \(\Omega\) are connected in series. A current of 2 A is flowing in the circuit. The potential difference at the ends of these resistances will be in the order:
Draw a well labelled diagram of longitudinal section of flower and describe various floral organs.
Describe human male reproductive system with diagram.
Describe the process of sex determination in human beings in detail.
What do you understand by base and acid? Write two applications of pH in daily life.
Write atomic number and valency of the following elements: (i) Nitrogen (ii) Magnesium
What is nutrition? Describe autotrophic and heterotrophic nutrition with suitable examples.
Write a property of Plaster of Paris and its two applications.
What do you mean by sustainable management of natural resources? Describe different measures for their conservation and management.
Explain the meaning of electromagnetic induction. What type of energy is utilized by an electric generator in generating electricity? Draw a labelled diagram of the construction of an a.c. generator and explain its working. What is the frequency of a.c. power supplied in India?