List of top Science Questions asked in UP Board

Ozone gas present in upper surface of atmosphere protects earth from which radiation coming from sun?
(i) Explain with the help of labelled ray diagram, the defect of hypermetropia. How is it corrected by a lens?
Molecular formula of butanol-2 is
What are required for photosynthesis?
What is required for the synthesis of thyroxine hormone ?
Mendel crossed long and dwarf plants of pea. The percentage of long and dwarf plants in first filial generation (F\(_1\)) was
Which of the following is a biotic component of Ecosystem ?
'Guard Cells' are found in
Precipitation reaction is
The magnitude of magnetic force acting on a current carrying conductor in a uniform magnetic field does not depend on
At the time of short circuit, the electric current in the circuit becomes
O_2(g) is obtained on heating
Strong base is
Liquid metal at ordinary temperature is
Valency of atom C in C_6H_6 is
If the electric current passing through a fixed resistor is halved, then the heat produced in it will become
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 blue colour of the sky is due to the
The image formed by a mirror is virtual, erect and longer than the object, then the mirror will be
The unit of power of a lens is
Write a note on the following:
(i) Gregor Johann Mendel
(ii) Reflex arc
(ii) Write chemical reaction for manufacture of bleaching powder and its two applications.
Write a short note on the following:
(i) Importance of pH in daily life
(ii) Micelle
(iii) Metals and Non-metals
(ii) What do you understand by Electrolytic refining? Explain with diagram.
(i) What are Exothermic and Endothermic reactions? Explain with example.