User Forum

X cannot make its own food and reproduces with the help of tiny structures called spores. Which of the following represents X?

AFern
BMushroom
CBryophyllum
DDahlia

The frequency of a source is 20 kHz. The frequencies of the sound waves produced by it in water and air will

ABe the same as that of the source
BDepend upon the velocity of the waves in these media
CDepend upon the wavelength of the waves in these media
DDepend upon the density of the media.

The given pictures show particles of the same matter. In which picture is the matter coldest?

A
B
C
D

Pointing to a photograph X said to his friend Y, "She is the only daughter of the father of my mother." How X is related to the person in the photograph?

ASister
BSon
CNephew
DNone of these

P, Q, R, S, T, V and W are sitting around a circle facing the centre. R is third to the right of V, who is second to the right of P. T is second to the left of Q, who is second to the left of W. V is sitting between S and W.
Who is sitting between T and V?

AW
BR
CS
DCan't be determined

Which of the following are possible sets of polarity when magnetising a steel bar PQ by the stroking method? (For magnets, N indicates north pole and S indicates south pole)

(i) 1 = N, 2 = S, P = N, Q = S
(ii) 1 = N, 2 = S, P = S, Q = N
(iii) 1 = S, 2 = N, P = S, Q = N
(iv) 1 = S, 2 = N, P = N, Q = S

A(i) and (ii) only
B(iii) and (iv) only
C(i) and (iii) only
D(ii) and (iv) only

There are ______ equal groups of 4 butterflies.



A4
B6
C8
D5

The shape of the Earth is spherical, but it appears flat to us. What could be the most appropriate reason for this?

AThe Earth is divided into two halves, Northern Hemisphere and Southern Hemisphere.
BThe Earth spins on its inclined axis.
CWe see only a small part of a very big curve of the Earth.
DThe shape of the orbit in which the Earth moves is elliptical.

The terminals of a battery are joined by a length of resistance wire. Which change, on its own will increase the current through the battery?

AConnecting an identical wire in series with the first one.
BCovering the wire with plastic insulation.
CUsing a shorter wire of the same material and same thickness.
DUsing a thinner wire of the same material and same length

Study the given reaction carefully.



Which of the following is correct about the above reaction?

AHydrogen is more reactive than copper.
BCopper is more reactive than hydrogen.
CBoth are equally reactive.
DNone of these.