List of top Questions asked in UP Board X

Moving towards right in Modern Periodic Table:
pH value of pure water at 25°C temperature is:
A concave lens is used:
Arsenic element is:
The amount of light entering in the eye is controlled by:
The correct formula for electric power in an electric circuit is:
The frequency of alternating current (a.c.) supply in India is:
The magnetic field inside a long, straight current carrying solenoid:
Propane is:
On passing a ray of white light through a prism, the colour which has minimum deviation is:
Write short notes on any two of the following:
(a) Fission
(b) Regeneration
(c) Budding
What is digestion? Describe the process of digestion in humans with a diagram.
Describe in detail the process of transportation of water, minerals and food in plants.
What are fossils? Explain their role as evidence for organic evolution.
(a) Write two uses of Bleaching Powder
(b) What is corrosion? Write two methods for its prevention.
(c) Write one use of Plaster of Paris.
What do you mean by alternative (non-conventional) or renewable energy sources? Describe any three renewable energy sources in detail.
The image formed by a concave mirror is real, inverted and of the same size as the object. The position of the object will be:
Balance the following equations:
(i) \( \text{H}_2\text{SO}_4 (aq) + \text{NaOH} (aq) \rightarrow \text{Na}_2\text{SO}_4 (aq) + \text{H}_2\text{O} (l) \)
(ii) \( \text{MgCl}_2 (aq) + 2\text{AgNO}_3 (aq) \rightarrow \text{Mg(NO}_3)_2 (aq) + 2\text{AgCl} (g) \)
(i) Write the name of reactant and product for the reaction: \[ \text{Zn} + \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + \text{H}_2 \uparrow \]
(ii) Write the reaction for thermal dissociation of ammonium chloride and name the substances formed.
Explain the meaning of electromagnetic induction. Mention any two methods for producing induced current in a coil. State Fleming's right hand rule for finding the direction of induced current.
Write the atomic number and valency of the following elements:
(i) Oxygen
(ii) Potassium
Explain the power of accommodation of the eye. Draw a ray diagram for image formation by a convex lens when (a) the object is at a distance of 2f, (b) the object is in between 2f and infinity.
Mention any two advantages of parallel combination of resistances. In the given circuit, find the value of current in each resistance and the total current in the circuit.
What is the use of an electric motor? Discuss the construction, working principle and working of an electric motor with the help of a labelled diagram.
Write notes on the following:
(a) Addition and substitution reactions
(b) Micelle
(c) Neutralization reaction