User Forum

Arun suspended a bar magnet on a string as shown in the diagram below. He brought 3 bar-shaped objects P, Q and R towards the bar magnet. He placed the ends (X and Y) of each object, near the north pole of the bar magnet and recorded his observations in the table below.

Which of the object(s) is/are the magnet?

A P only
B Q only
C P and Q only
D P and R only

Match column I with column II and select the correct option from the codes given below.

Refer to the given figure representing integration of different human systems X, Y and Z. Select the option that correctly identifies these systems.


AX - Digestive system Y - Circulatory system Z - Respiratory system
BX - Respiratory system Y - Circulatory system Z -Digestive system
CX - Circulatory system Y - Digestive system Z -Respiratory system
DX - Digestive system Y - Respiratory system Z -Circulatory system

Refer to the given Venn diagram and select the option which correctly identifies X, Y and Z.


A
B
C
D

Ruchi categorised animals on the basis of their body coverings. She made three groups and by mistake placed one wrong member in each group. Identify the wrong member of each group and select the correct option.
Group I - Snake, Lizard, Crab
Group II - Sloth, Platypus, Salmon
Group III - Penguin, Pigeon, Grasshopper

ACrab of group I should be interchanged with grasshopper of group III.
BSalmon of group II should be replaced with toad.
CPlatypus of group II should be interchanged with pigeon of group III.
DGrasshopper of group III should be replaced with parakeet.

Which of the following is a mismatched pair?

A World Conservation Union (WCU) – Maintains Red Data Book
B Jim Corbett National Park, Uttarakhand – First national park established in India
C Western Ghats and Eastern Himalayas – Biodiversity hotspots of India
D Indian rhinoceros – An extinct animal

Study the given figure and select the incorrect statement regarding P - S.


AP form inside the anther and possess a tough protective coat that prevents them from drying up.
BQ is the part of pistil that receives pollen grains from anthers.
CR carries male gametes to the ovule present in ovary.
DS fuses with male gamete and forms endosperm after fertilisation.

Compound leaves are present in

AHibiscus
BPeepal
CBanana
DNeem.

Study the given experimental set-up and select the correct observation.


AA homogeneous mixture will be formed in test tubes 4 and 5.
BA heterogeneous mixture will be formed in test tubes 2 and 3 and solute particles will settle at the bottom after some time if left undisturbed.
CComponents in test tubes 5 and 6 are too small in size and hence cannot be separated by filtration.
DA heterogeneous mixture is formed in test tubes 1 and 2 and solute particles will float on the surface of water.

The bob of a simple pendulum is swinging between points X and Y. It takes 15.6 s to swing thirty times from X to Y and back to X. What is the time period of the pendulum?


A15.6 s
B1.92 s
C1.40 s
D0.52 s