List of top Science Questions asked in UP Board

Explain exothermic and endothermic reactions.
Write the IUPAC names of the following compounds:
What is pH value? How is it related to hydrogen ion concentration?
Differentiate between minerals and ores.
Write the balanced chemical equations for the following reactions:
The resistances 2Ω, 3Ω, and 5Ω are joined in series. If the two ends of the combination are joined to a potential difference of 30 volts, then find the potential difference between the ends of each resistance.
Write down the working and colours of the insulation of the wires used in the domestic electrical distribution circuit:
(i) Live wire
(ii) Earthing wire
(iii) Neutral wire
Explain
(i) Fleming’s Left Hand Rule and
(ii) Right Hand Thumb Rule. For which physical quantities are they used for finding their directions?
At what distance should an object be placed from a concave mirror of focal length 10 cm, so that a real image 5 times larger is formed? Also, find the position of the image.
Which of the following organ represents the male reproductive organ in plants?
The focal length of a convex lens is 50 cm. State the position of the image of an object placed at a distance of 25 cm, perpendicularly on its axis. Also, determine the magnification of the image.
Loop is placed in which part of the female reproductive system?
Which of the following is/are called environment-friendly practice(s)?
Which of the following is an amphoteric oxide?
Reproduction in Hydra occurs by:
The process of breakdown of pyruvate takes place in:
The kidneys in human beings are a part of which system?
Chemical formula of propane is:
Mendel got his primary education in:
In the chemical reaction, $2 FeCl_3 + 2 H_2O + Y \rightarrow 2 FeCl_2 + H_2SO_4 + 2 HCl$, Y is:
Complete the following chemical equation:
________ + PCl5 → CH3COCl + POCl3 + HCl
The filament in an electric bulb is made of:
The transformation in an electric cell is:
Matte mainly consists of:
Which of the following is an acidic salt?