User Forum

Refer to the given figure showing different layers of atmosphere P-T and select the correct statement regarding them.


A Layer R prevents meteorites from reaching the Earth’s surface.
B Layer T absorbs harmful ultraviolet rays of the Sun.
C Satellites orbit around the Earth in layer P.
D All the weather changes take place in layer Q.

The gravitational force between two masses kept at a certain distance is f N. The same two masses are now kept at distance 5 km under sea-water and distance between them remain same. The gravitational force between them in water is (Take mass density of water, r = 1000 kg/m³)

Af N
B(f + 5)N
C(f + 0.005)N
Df/5 N

The given figure shows set-up to study the reaction of gas X with copper(II) oxide:

Which of the following statements is/are correct?
I. 1 mole of H₂O contains 2 moles of oxygen molecules and 1 mole of hydrogen molecules.
II. Gas X is a compound containing nitrogen and hydrogen.
III. The number of atoms present in 22.4 L of N₂ is 6.023 × 10²³.
IV. The number of atoms present in 22.4 L of water vapours is 18.069 × 10²³.

AI only
BII and IV only
CIII and IV only
DII and III only

Select the odd one out.

A Jupiter
B Saturn
C Uranus
D Venus

Refer to the given figure and select the INCORRECT option regarding it.


AAn industry was set up in the area at time X.
BThe industry was relocated at time Y.
CA forest was planted between time X and Y which grew to its matured state at around time Z.
DNone of these

Select the option in which the odd member is encircled correctly.

AWheelchair ramp, Steering wheel
BScissor, Screw driver
CBottle cap, Pen cap,
DKnife, Bicycle pedal

Match column I (vitamin) with column II (chemical name) and column III (deficiency disease) and select the correct option from the given codes.


AP-(i)-(O); Q-(ii)-(M); R-(iii)-(N); S-(iv)-(L)
BP-(iii)-(M); Q-(ii)-(N); R-(i)-(O); S-(iv)-(L)
CP-(ii)-(L); Q-(iii)-(N); R-(iv)-(O); S-(i)-(L)
DP-(iv)-(L); Q-(i)-(O); R-(iii)-(M); S-(ii)-(N)

Which one of the following match is correct ?

ASeeds – Absorb water and mineral salts from soil
BStem – Transports water and mineral salts to all parts of the plant
CLeaves – Absorb water from air
DFlower – Holds the plant firmly to the soil

Find the number of squares in the given figure.


A32
B33
C30
DMore than 33

A sponge changes its shape when pressed or squeezed. Why is it still considered a solid?


A It has a mass.
B It does not have a definite volume.
C It has a definite volume and retains its shape unless pressed.
D It can flow like a liquid.