List of practice Questions

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:
Write an example of a combination reaction (write equation only).
Write electronic configuration for the following elements:
(i) Sodium
(ii) Chlorine
Balance the following equations:
(i) Fe (s) + H2O (g) → Fe3O4 (s) + H2 (g)
(ii) C6H12O6 (aq) + O2 (aq) → CO2 (aq) + H2O (l)
Write short notes on the following:
(a) Acid rain
(b) Ductility and Malleability
(c) Micelle
An object of length 2 cm is placed in front of a convex lens perpendicular to its axis, having focal length of 20 cm. Distance of the object from the lens is 30 cm. Find the position and nature of the image.
On which factors does the force acting on a current carrying conductor placed in a magnetic field depend?
State the right-hand thumb rule for finding the direction of magnetic field associated with a current carrying conductor. Show the magnetic field lines due to a straight current carrying conductor.
What is the importance of fuse in electrical circuits? Total load of a house is 2200 W. Electricity is supplied at 220 V. What should be the rating of fuse used in the house? Write down the commercial unit of electrical energy.
Write the names of the wires used in the domestic electrical circuit and also write the colours of the insulating wires.
Pyruvate is oxidized in which part of the cell in presence of oxygen?
Why did Mendel conduct his experiment?
Which one of the following is the main substance responsible for ozone layer depletion?
Which one of the following make up the food chain?
Explain the phenomenon of refraction of light.
Write a short note on hypermetropia and its correction.
Give the formula for the focal length of a convex mirror. Give any two uses of the convex mirror.
Following reaction:
\(\text{CaCO}_3 (s) \xrightarrow{\text{heat}} \text{CaO} (s) + \text{CO}_2 (g)\)
is an example of:
Which atom has the property of catenation?
Alkyne among the following is:
.......... is used in the form of fuel and medicine.
Unit of kidney, which takes part in the process of excretion is:
Xylem in the plants is responsible for:
Autotrophic nutrition requires:
What do you mean by endocrine glands? Describe the functions of hormones secreted by any four endocrine glands in humans.