User Forum

Which of the following statement(s) is/are correct as according to the given figures?

(i) In figure (a), for a ray starting from a point M in a square arrangement of four identical mirrors each (side x), the ray reaches at corner X after two reflections for angle
(ii) For a point source of light(s) in front of a plane mirror PQ as shown in the figure (b), the length of reflected patch of light on the screen is

A(i) only
B(ii) only
CBoth (i) and (ii)
DNeither (i) nor (ii)

The nearest and farthest planets from the sun are ________ respectively.

A Mars and Venus
B Mercury and Pluto
C Venus and Pluto
D Earth and Neptune.

The given diagram shows a mattress that has springs inside it. Which of the following statements are correct when the boys lie on the mattress?
(a) The more mass the boys have, the greater will be the force that acts on the springs.
(b) The springs will have a change in their masses.
(c) The springs will be compressed.
(d) The springs will be stretched.


A(a) and (b) only
B(a) and (c) only
C(a) and (d) only
D(b) and (d) only

Study the given diagram that shows circulation of blood in our body. Select the correct statement regarding organs X and Y.


AOrgan X is also a part of respiratory system.
BOrgan Y is a pumping organ.
COrgan X is also responsible for removing sweat from our body while organ Y is also responsible for formation of urine.
DBoth A and B

Which of the following statements is INCORRECT?

AAn object can cast differently shaped shadows, when light is shone on it at different angles.
BLength of the shadow changes when the distance between the object and the light source is increased or decreased.
CShadow is formed when an object blocks the path of light.
DLength of a shadow does not change when the screen is moved away from the object.

Read the following statements about the Earth.
1. It has many natural satellites that move around it.
2. It has an atmosphere that has gases such as carbon dioxide and oxygen.
3. It has an atmosphere that helps to keep right temperature for living things to live in.
4. Its position from the Sun is just right for living things to receive the required amount of light and heat energy.
Which of these statements are correct?

A1 and 3 only
B1, 2 and 4 only
C2, 3 and 4 only
D1, 2, 3 and 4

Refer to the given picture and select the correct statement regarding it.


AIt is a 73 m high structure.
BIt is located in Mumbai on the waterfront of Bay of Bengal.
CIt was built in the year 1911 by Ustad Ahmad Lahauri.
DIt is made up of yellow basalt and concrete.

A government campaign was conducted in an agricultural area where sparrow population was exterminated as these birds were known to eat grains and decrease crop yield. However, in the months that followed, grain production was severely reduced leading to famines in that area.

The given graph traces the population changes of one more species in that area after campaign.
Which of the following best explains this?

AThere was overgrowth of crops due to reduced sparrow population causing the crops to compete for available resources thereby leading to crop failure.
BThe crash in sparrow population caused the population of locusts (which sparrows prey upon) to spike, which in turn wiped out available crops in field.
CThe increase in the population of locust is not related with the decrease in the population of sparrow.
DNone of these

What should Seema do to find out whether a material is a magnet?

AFind out if the material is a metal or a non-metal.
BFind out if the material is a conductor or an insulator.
CFind out if the material can be attracted to a steel plate.
DFind out if the material can be repelled by a compass.

Refer to the given flow chart and select the INCORRECT option regarding X, Y and Z.


AX can be mould while Z can be Pistia.
BY can be elm while Z can be Hydrilla.
CZ can be cactus while Y can be duckweed.
DBoth A and B