List of top Science Questions asked in UP Board

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 unsaturated hydrocarbon.
Write a short note on pH of a solution.
Explain the formation of \( \text{Na}^+ \text{Cl}^- \) by combination of Na atom (Atomic number 11) and Cl atom (Atomic number 17).
What is an electromagnet? State its two uses.
State any two properties of the electrochemical series.
How does an electromagnet differ from a permanent magnet?
Explain why the colour of the clear sky appears blue.
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.
What is the unit of specific resistance? A resistance of 25 \( \Omega \) is connected to a 12-volt battery. Calculate the heat energy in joules generated per minute.
What are the factors on which the force acting on a current-carrying conductor depends when placed in a uniform magnetic field? Write the rule to find the direction of this force.
How much organic matter reaches from one trophic level to the next trophic level?
Which type of mirror is used as a rear-view mirror in cars? Why do we prefer it?
Which of the following plants has a unisexual flower?
Intake of oxygen from outside of the body and breakdown of food sources as per requirement of the cell is called
Which among the following is not a plant hormone?
The main thinking part of the brain is called
The product of photosynthesis in plants is
Number of molecules of water in one molecule of washing soda is
The number of sex chromosomes in humans is
Which is formed by reaction of Plaster of Paris with water?