List of top Questions asked in CBSE Class X

Which structure in a leaf is mainly responsible for gaseous exchange?
Two statements are given below. They are Assertion (A) and Reason (R). Read both the statements carefully and choose the correct option:
Assertion (A): The discovery of sea routes to Asia and America shrank the pre-modern world in the sixteenth century.
Reason (R): During this period European entry into the Indian Ocean expanded trade.
Three coins are tossed together. The probability of getting exactly two tails is
What is 'yellow hair' a symbol of in "For Anne Gregory"? Discuss.
What is the TF-IDF (Term Frequency-Inverse Document Frequency) algorithm used for?
Explain the three domains of AI: Data Science, Computer Vision (CV), and Natural Language Processing (NLP).
Study the given data and answer the question that follows:
Comparative Data of few States \[ \begin{array}{|c|c|c|c|} \hline \textbf{States} & \textbf{Infant Mortality Rate (2020)} & \textbf{Literacy Rate (2017--18)} & \textbf{Net Attendance Rate (Class 1 to 5)} \\ \hline \text{State A} & 28 & 82 & 73 \\ \text{State B} & 6 & 94 & 94 \\ \text{State C} & 27 & 62 & 69 \\ \hline \end{array} \]
By how many of the following points does State B’s literacy rate exceed from State A in 2017--18?
If \( 2 \sin A = 1 \), then the value of \( \tan A + \cot A \) is :
Which of the plant hormones are responsible for the following processes? Promote cell division Inhibition of growth Detection of light Wilting of leaves
Briefly mention the steps in double-circulation through human heart.
There are many varieties of mushrooms available in the world. One such mushroom ‘Amanita muscaria’ has a upper part which is like red cap (hemispherical) and lower part is like white stem (cylindrical). The hemispherical cap’s radius = 3 cm and cylindrical stem is 2 cm high with diameter 1.4 cm. Considering mushroom a solid object, answer the following questions:

36(i) What is the total height of a mushroom ?
Find the missing frequencies p and q in the following frequency distribution, when sum of frequencies is 40 and mean is 19 :
In a circular museum hall of radius 14 m, some statues are displayed. Statues are kept inside the inner concentric circle of radius 7 m. One such statue lying in sector OAB, is fenced along line segments OA, AP, PB and BO where P is a point on outer circle. Based on above information, answer the following questions:

37(i) Find \(m\angle AOP\).
Seema daily goes to a park to exercise on machines available there. When Seema spent 15 minutes on exercise bicycle and 30 minutes on double cross walker, she received a message of burning 435 calories on her fitness watch. When she spent 30 minutes on exercise bicycle and 40 minutes on double cross walker, she received a message of burning 690 calories. Based on above information, answer the following questions:

38(i) Represent the above situation in terms of a pair of linear equations in two variables.
In the given figure, \(\Delta ABC\) is a right-angled triangle with \(\angle A = 90^\circ\). AD is perpendicular to BC.

35(a)(i) Prove that \(\Delta DBA \sim \Delta DAC\)
Find the H.C.F. and L.C.M. of 408 and 312.
Determine the ratio in which the line \(2x + y = 6\) divides the line segment joining the points (1, 3) and (2, 5).
In the given figure, PQ is a tangent to a circle with centre \(O(-5, 3)\). If coordinates of P and Q are \((3, 1)\) and \((0, 6)\) respectively, then using distance formula, show that \(PQ \perp OQ\).
If 14th term of an A.P. is 4 and its 15th term is zero, then its first term is
Prove that : \(\sqrt{\frac{1 - \cos A}{1 + \cos A}} = \frac{\tan A}{\sec A + 1}\).
In the given figure, two triangles ABC and PQR are shown such that \(\angle A = \angle P\) and \(\angle C = \angle R\). If \(AD \perp BC\) and \(PS \perp QR\), then prove that (i) \(\Delta ADB \sim \Delta PSQ\) (ii) \(AD \times QS = BD \times PS\).
\(17 \times 11 \times 13 + 11\) is
The distance between the points \(P(-2, 5)\) and \(Q(5, -2)\) is
PQ is tangent to the circle with centre O such that OP = 2OQ. m\(\angle\)OPQ is
Seema daily goes to a park to exercise on machines available there. When Seema spent 15 minutes on exercise bicycle and 30 minutes on double cross walker, she received a message of burning 435 calories on her fitness watch. When she spent 30 minutes on exercise bicycle and 40 minutes on double cross walker, she received a message of burning 690 calories. Based on above information, answer the following questions:

37(i) Represent the above situation in terms of a pair of linear equations in two variables.