List of top Questions asked in UP Board X- 2024

The process for obtaining oxide from carbonate ore by heating at a high temperature in a limited supply of air is:
Chemical reaction CuSO$_4$ + Fe $\rightarrow$ FeSO$_4$ + Cu is:
The autotrophic mode of nutrition requires:
Which of the following is a plant hormone?
The anther contains:
Reproduction by means of regeneration occurs in:
The gap between two neurons is called a/an:
Two wires of resistances R and 2R are joined first in series and then in parallel. If the total resistances in the two conditions are \( R_1 \) and \( R_2 \) respectively, then \( R_1 / R_2 \) will be:
Functional group in propanal is:
The pH value of a neutral solution is:
The ketone in the following is:
The element producing hydrogen gas with cold water is:
Which of the following lenses should be used to read small letters?
The cause of twinkling of stars is:
The image by a convex mirror of an object placed at infinity is:
The colour having the largest angle of deviation on passing white light through a prism will be:
Describe in brief the structure of the kidney in humans and also describe its functions.
Write a short note on pH of a solution.
Write a short note on unsaturated hydrocarbon.
What is an electromagnet? State its two uses.
How does an electromagnet differ from a permanent magnet?
State any two properties of the electrochemical series.
Explain the formation of \( \text{Na}^+ \text{Cl}^- \) by combination of Na atom (Atomic number 11) and Cl atom (Atomic number 17).
An object of 3 cm height is placed at a distance of 8 cm from a concave mirror which produces a virtual image of 4.5 cm height. Find the position of the image and focal length of the mirror.
Explain why the colour of the clear sky appears blue.