List of top Questions asked in CBSE Class X

Draw the graphs of the equations \(x – y + 1 = 0 \)and \(3x + 2y – 12 = 0\). Determine the coordinates of the vertices of the triangle formed by these lines and the \(X\)-axis, and shade the triangular region.

The following table gives the distribution of the life time of 400 neon lamps :

Life time (in hours)Number of lamps

1500 - 2000

14

2000 - 2500

56

2500 - 3000

60

3000 - 3500

86

3500 - 4000

74

4000 - 4500

62

4500 - 5000

48

Find the median life time of a lamp.

Which of the following lenses would you prefer to use while reading small letters found in a dictionary?

Butanone is a four-carbon compound with the functional group

At the time of short circuit, the current in the circuit
Which of the following correctly describes the magnetic field near a long straight wire?
Did Lencho try to find out who had sent the money to him? Why/Why not?
Draw a labelled diagram of the longitudinal section of a flower.

Describe double circulation of blood in human beings.Why is it necessary?

Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.
A spherical mirror and a thin spherical lens have each a focal length of −15 cm. The mirror and the lens are likely to be
Why does the conductor refer to Valli as ‘madam’?
How does Ausable manage to make Max believe that there is a balcony attached to his room? Look back at his detailed description of it. What makes it a convincing story?
Compare the power used in the 2 Ω resistor in each of the following circuits:
  1. a 6 V battery in series with 1 Ω and 2 Ω resistors,
  2. a 4 V battery in parallel with 12 Ω and 2 Ω resistors.
Do you think Horace Danby was unfairly punished, or that he deserved what he got?
Several electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A?
An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image, its nature and size.

Sides AB and BC and median AD of a triangle ABC are respectively proportional to sides PQ and QR and median PM of ∆PQR (see the given figure). Show that ∆ABC ∼ ∆PQR.

Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?
The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below -
I (amperes) 0.51.02.03.04.0
V (volts)1.63.4  6.710.213.2
Plot a graph between V and I and calculate the resistance of that resistor.
Why does Valli refuse to look out of the window on her way back?
Bholi had many apprehensions about going to school. What made her feel that she was going to a better place than her home?
Fe2O3 + 2Al → Al2O3 + 2Fe 
The above reaction is an example of a:
What are the subtle ways in which the lady manages to deceive Horace Danby into thinking she is the lady of the house? Why doesn’t Horace suspect that something is wrong?

The following table shows the ages of tha year:  

Age (in years) 

5 - 15

15 - 25

25 - 35

35 - 45

45 - 55

55 - 65

Number of patients

6

11

21

23

14

5

Find the mode and the mean of the data given above. Compare and interpret the two measures of central tendency.