List of top Science Questions

Which of the following is a plant hormone?
An unsaturated hydrocarbon in the following is —
The element having 7 electrons in its outermost orbit is —
Blood pressure is measured by —
Chemical formula of calcium nitrate is —
In a conductor, 10 ampere of current is flowing. What will be the amount of charge flowing in 2 seconds corresponding to it?
The formula of plaster of Paris is —
The power of a lens is +2 dioptre. What will be its focal length in cm?
If the units of power, work, and time are represented by \( x_1, x_2, x_3 \) respectively, then which of the following relations is correct?
In which of the following wires of domestic electric distribution is the fuse wire connected in series?
IUPAC name of CH{3–CH(CH3)–CHO is —}
The solution with pH 8.5 is —
Write an essay on human hormones.
What is Ozone layer? Highlight its importance for Earth.
From which lens the image of object formed is virtual, erect and smaller than the object?
Due to which phenomenon of light does the sky appear blue?
In a spherical mirror the distance between its centre of curvature and pole is 20 cm. What is the distance of focus from the pole of the mirror?
Write the chemical equation for the method of obtaining bleaching powder and its two uses.
Explain reactivity series and write its one use.
What do you understand by acid and base? Write two applications of pH in daily life.
What is Fleming's Left Hand Rule?
On which factors does the force acting on a current-carrying conductor placed in a magnetic field depend?
On which factors does the magnetic field due to a current-carrying solenoid depend?
How many wires are used in domestic electrical circuits? Write the names of each and their colours of insulation.
Explain the process of combustion and write chemical equations of two examples of it.