List of practice Questions

IUPAC name of CH{3–CH(CH3)–CHO is —}
What is Ozone layer? Highlight its importance for Earth.
Write an essay on human hormones.
From which lens the image of object formed is virtual, erect and smaller than the object?
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?
Due to which phenomenon of light does the sky appear blue?
Explain reactivity series and write its one use.
What do you understand by acid and base? Write two applications of pH in daily life.
Write the chemical equation for the method of obtaining bleaching powder and its two uses.
On which factors does the magnetic field due to a current-carrying solenoid depend?
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?
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.
Which one of the following is an example of a producer in an ecosystem?
Which character(s) of the Pea plant has been studied by Mendel in his experiments?
State two natural phenomena of scattering of light.
How many types of defects of vision are there? Write down their names.
Write down two uses each of convex mirror and convex lens.
Draw a ray diagram of the image of an object formed by a concave lens.
How are voltmeter and ammeter joined on passing current in a resistor?
A refrigerator of 500 watts is used for 12 hours every day. How much kilowatt-hour energy is consumed by the refrigerator for 30 days?
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: