List of top Science Questions

Mendel crossed long and dwarf plants of pea. The percentage of long and dwarf plants in first filial generation (F\(_1\)) was
'Guard Cells' are found in
Which of the following is a biotic component of Ecosystem ?
What is required for the synthesis of thyroxine hormone ?
Valency of atom C in C_6H_6 is
O_2(g) is obtained on heating
At the time of short circuit, the electric current in the circuit becomes
Strong base is
Precipitation reaction is
Liquid metal at ordinary temperature is
The magnitude of magnetic force acting on a current carrying conductor in a uniform magnetic field does not depend on
The image formed by a mirror is virtual, erect and longer than the object, then the mirror will be
If the electric current passing through a fixed resistor is halved, then the heat produced in it will become
The blue colour of the sky is due to the
The refractive index of glass is 1.5. The speed of light in air is \(3 \times 10^8\) m/s. The speed of light in glass will be
The unit of power of a lens is
Write a note on the following:
(i) Gregor Johann Mendel
(ii) Reflex arc
Describe co-ordination in plants with examples.
Write a short note on the following:
(i) Importance of pH in daily life
(ii) Micelle
(iii) Metals and Non-metals
What are the trophic levels? Give an example of a food chain and state the different trophic levels in it.
(ii) What do you understand by Electrolytic refining? Explain with diagram.
(ii) Write chemical reaction for manufacture of bleaching powder and its two applications.
(i) What are Exothermic and Endothermic reactions? Explain with example.
Write a note on the following:
(i) Spore formation in Rhizopus
(ii) Seed germination
Describe the digestive system of human with diagram.