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Which of the following options is correct?
(i) Force of gravitation on a body is equal to the true weight of the body.
(ii) A person standing in an elevator moving downwards with constant acceleration finds his weight less than actual.

A Only (i) is correct.
B Only (ii) is correct.
C Both (i) and (ii) are correct.
D Neither (i) nor (ii) is correct.

Thyroxine controls ______ in frogs and the development of _____during embryonic development of other vertebrates. Thyroxine production requires the presence of ______ in diet.
Select the correct sequence of words to complete the above passage.

A Development, Circulatory system, Iodine
B Metamorphosis, Circulatory system, Calcium
C Development, Nervous system, Iron
D Metamorphosis, Nervous system, Iodine

Identify X in the given Venn diagram.


ASilk
BWool
CCotton
DJute

Which of the following methods of cooking are healthy for an obese person?
1. Baking
2. Steaming
3. Boiling
4. Frying
5. Roasting

A1, 2, 4 only
B2, 4, 5 only
C3, 4, 5 only
D1, 2, 3, 5 only

Study the given classification chart carefully. Identify P, Q and R and select the INCORRECT option regarding them.


A P comprises of stomach, small intestine and large intestine.
B Q comprises of heart, blood vessels and blood.
C R comprises of a pair of kidneys.
D Q receives nutrients from digestive system and oxygen from respiratory system of our body.

Saanvi, a class 8 student carried out an experiment in which she put one end of four rods, P, Q, R and S made up of iron, copper, glass and silver respectively into a container filled with boiling water. After 15 minutes, she recorded the temperature at the undipped ends of all rods.
Which rods will show the highest and the lowest temperature respectively?

AP and S
BP and Q
CR and S
DS and R

Read the following statements carefully.
W : I am very reactive and catch fire if exposed to air. To prevent this, I am stored in water.
X : I am a good conductor of heat and acquire a reddish-brown coating on exposure to moist air.
Y : I am soft and have dull appearance. I form acids on reacting with oxygen and water.
Z : I am malleable, ductile and acquire a dull green coating on exposure to moist air.
Identify W, X, Y and Z.

--------W---------------X-------------Y--------------Z
APhosphorus--Copper------Sulphur--------Iron
BPhosphorus--Iron----------Sulphur--------Copper
CSulphur------Iron-----------Phosphorus---Copper
DCopper------Phosphorus---Iron------------Sulphur

Equal forces F act on isolated bodies A and B as shown in the figure. The mass of B is three times that of A. The magnitude of the acceleration of A is


AThree times that of B
B that of B
CNine times that of B
D that of B.

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


AP-(ii), Q-(ii), R-(iii)
BP-(ii), Q-(i), R-(iii)
CP-(i), Q-(iii), R-(ii)
DP-(i), Q-(i), R-(ii)

The numerical ratio of distance to displacement is ________.

A Always equal to one
B Always less than one
C Always greater than one
D Equal to or more than one.