English Medium इयत्ता १० - CBSE Important Questions

Prove that the lengths of the tangents drawn from an external point to a circle are equal.

Write the functions of the following parts in human female reproductive system:-

(i) Ovary

(ii) Oviduct

(iii) Uterus

Describe the function of placenta.

Prove that the tangent at any point of a circle is perpendicular to the radius through the point of contact.

Prove that a parallelogram circumscribing a circle is a rhombus.

List three distinguishing features, in tabular form, between acquired traits and the inherited traits.

What is meant by a power of a lens? Define its SI unit. 

Write the function of the following part of the human eye: Cornea

Write the function of the following part of the human eye: crystalline lens

Write the function of the following part of the human eye: ciliary muscles

Prove that opposite sides of a quadrilateral circumscribing a circle subtend supplementary angles at the centre of the circle.

Draw the well-labelled diagram of the human excretory system

Draw the well-labelled diagram of the human excretory system

What is atmospheric refraction? Use this phenomenon to explain the following natural events:

Twinkling of stars

Draw diagrams to illustrate your answers.

Prove that, if a line is drawn parallel to one side of a triangle to intersect the other two sides, then the two sides are divided in the same ratio.

Prove that, if a line is drawn parallel to one side of a triangle to intersect the other two sides, then the two sides are divided in the same ratio.

Prove that, if a line is drawn parallel to one side of a triangle to intersect the other two sides, then the two sides are divided in the same ratio.

List any four methods of contraception used by humans. State in brief two advantages of adopting such preventive methods.

Explain how the embryo gets nourishment inside the mother’s body.

Write Joule's law of heating.