User Forum

In a pressure-kerosene stove,
(i) We pump kerosene and convert it into vapours.
(ii) The vapours are then ignited.
Which of the following is true about the above statements?

A(i) is a chemical change; (ii) is a physical change.
B(i) is a physical change; (ii) is a chemical change.
CBoth (i) and (ii) are physical changes.
DBoth (i) and (ii) are chemical changes.

The freezing and boiling points of a substance 'P' are -220°C and -185°C respectively. At which of the following range of temperatures will 'P' exist as a liquid?

ABetween -175°C and -210°C
BBetween -190°C and -225°C
CBetween -200°C and -160°C
DBetween -195°C and -215°C

Arrange the following planets in increasing order of time required to complete one revolution around Sun.
(i) Earth (ii) Uranus
(iii) Mars (iv) Jupiter

A(i), (ii), (iii), (iv)
B(i), (iii), (iv), (ii)
C(iv), (iii), (ii), (i)
D(ii), (iii), (i), (iv)

Find the odd one out.

A
B
C
D

A constant current flows in a horizontal wire in the plane of the paper from west to east as shown in the given figure. The direction of magnetic field will be north to south, at a point __________.


ADirectly above the wire
BDirectly below the wire
CLocated in the plane of the paper, on the north side of the wire
DLocated in the plane of the paper, on the south side of the wire

Which of the following statements hold true regarding the given plants X and Y?
1. Plant X depends partly on animals for food but can also make its own food while plant Y cannot make its own food.
2. Plant X has chlorophyll while plant Y does not contain chlorophyll and is non-green.
3. In plant X, food is prepared by the green stem, whereas plant Y obtains its food from dead and decaying plants and animals.
4. Plant X and plant Y have patches of green colour. Only green part of their leaves performs photosynthesis.


A1, 3 and 4
B2 and 3
C1 and 4
D3 and 4

A can jump two steps at a time. If it is at 5^th step, where will it be after 2 jumps?

A
B
C
D

Water droplets that are too heavy to float make

AFog
BClouds
CRain
DSmoke

Multimedia is used for many purposes like _________.

AEducation
BAdvertising
CPlaying games
DAll of these

Choose the best reply.
Arpita : Is your test result out?
Kavita : __________.

AWhat's outside?
BNo, not yet.
CWhat's the matter?
DIt's not in.