List of top Questions asked in UP Board

Pure air is:
Alkene is:
pH value of pure water is:
On moving from left to right in the third period of the periodic table:
Describe the female reproductive system of humans.
Write an essay on sustainable management of natural resources.
A mirror producing a virtual image larger than the object is:
The human eye forms the image of an object at its:
The colour of white light which is deviated maximum on passing through the glass prism is:
The current passing through an electric kettle has been doubled. The heat produced will become:
The most suitable material for making the core of an electromagnet is:
What do you mean by electromagnetic induction? On what factors does the value of induced current in a circuit depend? Name and state the rule used for determination of direction of induced current. State the practical application of this phenomenon in everyday life. OR Draw a labelled circuit diagram of an electric generator and explain its principle and working.
Draw a labelled circuit diagram of an electric generator and explain its principle and working.
Write IUPAC name of the following compounds:

[(a)] Neopentane
[(b)] Secondary butyl alcohol
[(c)] Trichloroacetic acid
[(d)] Acetylene
How many groups and periods are present in the Modern Periodic Table? In which groups are alkaline metals and inert elements placed in this periodic table?
What happens when (write only balanced chemical equation):

[(a)] CO\(_2\) gas is passed in lime water for a long time
[(b)] Dry lime reacts with dry Cl\(_2\) gas
[(c)] Gypsum is heated
[(d)] Sodium metal reacts with water
Write short notes on the following:

[(a)] Roasting
[(b)] Double Decomposition
[(c)] Corrosion
Comment upon nuclear and oceanic energy.
Explain homologous and analogous organs.
Give an account on photosynthesis.
Regeneration occurs in:
Vegetative reproduction through leaves occurs in:
Darwin is famous for:
Which country is called ‘country of winds’?
The radius of curvature of a concave mirror is 40 cm. An object is placed in front of it at a distance of 15 cm. Find the position of its image and draw its ray diagram.