List of top Science Questions asked in UP Board

Which of the following is correctly matched?
(ii) An object at a distance of 16 cm from a spherical mirror forms a virtual image at a distance of 12 cm behind the mirror. Determine the magnification of the image and type of the mirror.
Mendel crossed long and dwarf plants of pea. The percentage of long and dwarf plants in first filial generation (F\(_1\)) was
What is required for the synthesis of thyroxine hormone ?
What are required for photosynthesis?
Which of the following is a biotic component of Ecosystem ?
Molecular formula of butanol-2 is
'Guard Cells' are found in
The magnitude of magnetic force acting on a current carrying conductor in a uniform magnetic field does not depend on
Strong base is
Precipitation reaction is
Valency of atom C in C_6H_6 is
At the time of short circuit, the electric current in the circuit becomes
Liquid metal at ordinary temperature is
O_2(g) is obtained on heating
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 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 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.
Describe co-ordination in plants with examples.
(ii) What do you understand by Electrolytic refining? Explain with diagram.
Write a short note on the following:
(i) Importance of pH in daily life
(ii) Micelle
(iii) Metals and Non-metals