List of top Science Questions asked in UP Board X

Which of the following plants has a unisexual flower?
The main thinking part of the brain is called
The product of photosynthesis in plants is
How much organic matter reaches from one trophic level to the next trophic level?
Which among the following is not a plant hormone?
Which type of mirror is used as a rear-view mirror in cars? Why do we prefer it?
Intake of oxygen from outside of the body and breakdown of food sources as per requirement of the cell is called
The number of sex chromosomes in humans is
Which is not true for metals?
Number of molecules of water in one molecule of washing soda is
Which is formed by reaction of Plaster of Paris with water?
Which is obtained by the reaction of ethanol with sodium?
Which is a non-metal in the following?
Nature of hydrogen ion (\( H^+ \)) is
The resistance of a wire of any substance of length \( l \) and area of cross-section \( A \) is 4 \( \Omega \). Another wire of the same substance has length \( 2l \) and area of cross-section \( \frac{A}{2} \). Then its resistance will be
When a beam of white light falls on the surface of a triangular glass prism it splits, after emerging out from the prism into various colours with different deviations. The colour which has minimum deviation is
The focal length of a converging lens is 20 cm. The power of this lens will be
Which of the following does not represent electrical power in a circuit?
The magnification produced by a convex mirror is always
The magnetic field produced due to a current-carrying conductor at a point on a distance \( r \) is
How are oxygen and carbon dioxide transported in humans?
A convex lens of focal length 10 cm forms a real image of the same size as the object. The distance between the object and its image will be:
What do you understand by corrosion? Give two measures for protection against it.
What do you understand by Exothermic and Endothermic reactions? Give examples.
Write short notes on the following:
(a) Acid rain
(b) Ductility and Malleability
(c) Micelle