36,230 questions & answers

What is the bhabar?

Name the three major divisions of the Himalayas from north to south.

Which plateau lies between the Aravali and the Vindhyan ranges?

Name the island group of India having coral origin.

Distinguish between

(i) Bhangar and Khadar

(ii) Western Ghats and Eastern Ghats

Which are the major physiographic divisions of India? Contrast the relief of the Himalayan region with that of the Peninsular plateau.

Give an account of the Northern Plains of India.

Write short notes on the following.

(i) The Indian Desert

(ii) The Central Highlands

(iii) The Island groups of India

A landmass bounded by sea on three sides is referred to as

(a) Coast
(b) Island
(c) Peninsula
(d) None of the above

Mountain ranges in the eastern part of India forming its boundary with Myanmar are collectively called

(a) Himachal
(b) Uttarakhand
(c) Purvachal
(d) None of the above

The western coastal strip, south of Goa is referred to as

(a) Coromandel
(b) Konkan
(c) Kannad
(d) Northern Circar

In Fig. 6.13, lines $\mathrm{AB}$ and $\mathrm{CD}$ intersect at $\mathrm{O}$. If $\angle \mathrm{AOC}+\angle \mathrm{BOE}=70^{\circ}$ and $\angle \mathrm{BOD}=40^{\circ}$, find $\angle \mathrm{BOE}$ and reflex $\angle \mathrm{COE}$.

In Fig. 6.14, lines $X Y$ and $M N$ intersect at $O$. If $\angle \mathrm{POY}=90^{\circ}$ and $a: b=2: 3$, find $c$.

In Fig. 6.15, $\angle \mathrm{PQR}=\angle \mathrm{PRQ}$, then prove that $\angle \mathrm{PQS}=\angle \mathrm{PRT}$.

In Fig. 6.16, if $x+y=w+z$, then prove that $\mathrm{AOB}$ is a line.

In Fig. 6.17, $\mathrm{POQ}$ is a line. Ray $\mathrm{OR}$ is perpendicular to line PQ. OS is another ray lying between rays OP and OR. Prove that

$\angle \mathrm{ROS}=\frac{1}{2}(\angle \mathrm{QOS}-\angle \mathrm{POS})$.

It is given that $\angle \mathrm{XYZ}=64^{\circ}$ and $\mathrm{XY}$ is produced to point $\mathrm{P}$. Draw a figure from the given information. If ray $\mathrm{YQ}$ bisects $\angle \mathrm{ZYP}$, find $\angle \mathrm{XYQ}$ and reflex $\angle \mathrm{QYP}$.

In Fig. 6.9, lines PQ and RS intersect each other at point $O$. If $\angle \mathrm{POR}: \angle \mathrm{ROQ}=5: 7$, find all the angles.

In Fig. 6.10, ray OS stands on a line POQ. Ray OR and ray OT are angle bisectors of $\angle \mathrm{POS}$ and $\angle \mathrm{SOQ}$, respectively. If $\angle \mathrm{POS}=x$, find $\angle \mathrm{ROT}$.

In Fig. 6.11, OP, OQ, OR and OS are four rays. Prove that $\angle \mathrm{POQ}+\angle \mathrm{QOR}+\angle \mathrm{SOR}+$ $\angle \mathrm{POS}=360^{\circ}$.