List of top Science Questions asked in UP Board

In which of the following mirrors, the field of view is maximum?
Which of the following statements is false?
Write an essay on Sexual Reproduction in Flowering Plants
Speed of light in medium (1) and medium (2) are \( v_1 \) and \( v_2 \) respectively, then the refractive index of medium (1) with respect to medium (2) is:
Power of a lens is -2.5 D. The focal length and nature of the lens is:
In order to save the environment, describe the five types of ‘R’.

Write IUPAC names of the following compounds:

Write the electronic configuration of chlorine (atomic number 17). Explain its position in the periodic table and write its valency.
Balance the following chemical equations
(a) \[ \mathrm{C_6H_{12}O_6 + 6\,O_2 \;\longrightarrow\; 6\,CO_2 + 6\,H_2O} \]
\[ \mathrm{CaCO_3 + 2\,HCl \;\longrightarrow\; CaCl_2 + H_2O + CO_2} \]
\[ \mathrm{N_2 + 3\,H_2 \;\longrightarrow\; 2\,NH_3} \]
\[ \mathrm{MnO_2 + 4\,HCl \;\longrightarrow\; MnCl_2 + Cl_2 + 2\,H_2O} \]
Give an account of post-fertilization changes in an angiospermic plant.
Describe the male reproductive system of humans.
Short Notes
(a) Oxidation Reaction: 
(b) Substitution Reaction: 
(c) Roasting:
Describe Mendel's Laws.
Explain with a drawing how hypermetropia is corrected. The near point of a hypermetropic eye is 75 cm. What is the focal length of the lens required to correct this defect? The near point of a normal eye is 25 cm.
On what factors does the resistance of a conductor depend? An electric bulb operated at 80 volts takes 10 amperes of current. How much resistance should be connected in series with the bulb to use it at 240 volts so that it takes the same current?
Define Kilowatt hour. How many Joules are equal to 1 kilowatt-hour? An electric kettle rated 220 volts, 2.2 kilowatts works for 3 hours. Calculate energy consumed and the current.
Draw a labelled ray diagram to show the formation of the image of an object placed between the pole and infinity by a convex mirror. State the properties of the image formed. Why do we prefer a convex mirror as a rear-view mirror in vehicles?
State the two ways to increase the force on a current-carrying conductor in a magnetic field. Name one device whose working depends on this effect. State Fleming’s left-hand rule with the help of a labelled diagram.
An eco-friendly renewable source of energy is:
Alveoli occur in:
For the transport of water, plants have:
Normal blood pressure of a healthy human is:
Who among the following is famous as the 'Water Man of India'?
Mendel is famous:
Sperms are formed in: