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Which of the following statements is/are true for a mixture?
(i) Mixtures can be homogeneous or heterogeneous.
(ii) Components in a mixture are present in a fixed ratio.
(iii) Components are chemically combined in a mixture.
(iv) Components of a mixture can be separated by physical methods.

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

Refer to the given word grid and answer the following questions.
(i) Names of how many items found in a first-aid box are hidden in the word grid?
(ii) Names of how many items that should be used under adult supervision are hidden in the word grid?

Warm water is poured slowly into a beaker of ice cubes as shown in the given figure.

What can be observed when the warm water is poured into the beaker?
I. The ice starts melting.
II. The glass expands.
III. The temperature of the ice decreases.
IV. The temperature of the warm water decreases.

A I and IV only
B II and IV only
C I, III and IV only
D I, II, III and IV

Mohit planned the picnic for a day, which is the fourth day from today. If yesterday was Sunday, then for which day did Mohit’s plan the picnic?

A Sunday
B Tuesday
C Thursday
D Friday

If Blue is called Red, Red is called White and White is called Black, then the colour of milk is _________.

AWhite
BBlue
CRed
DBlack

Which of the following internal organs does the structure in the given figure protects?

(i) Brain (ii) Lungs (iii) Heart (iv) Intestine

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

Which of the following statements is correct about dodder plant?

AIt can prepare its food as well as eat insects.
BIt has special structures called pitchers having digestive liquids.
CIt can obtain nutrition from other plants as it cannot prepare its own food.
DIt depends on dead and decaying plants and animals for food.

Refer to the given figure of soil profile and select the correct statements regarding the layers P, Q, and R.

(i) Layer Q is the subsoil and roots of plants may grow till this layer.
(ii) Layer R is the bedrock and it contains abundant water.
(iii) Layer P is the topsoil which is the most fertile layer but lack humus.
(iv) Layer R is the bedrock and it may be a source of metals such as gold, copper, etc.
(v) Layer P supports plant growth.

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

In an experiment demonstrating the evolution of oxygen in Hydrilla, sodium bicarbonate is added to water in the experimental set-up.
What would happen if all other conditions are favourable?

A Amount of oxygen evolved decreases as carbon dioxide in water is absorbed by sodium bicarbonate.
B Amount of oxygen evolved decreases as the availability of carbon dioxide increases.
C Amount of oxygen evolved increases as the availability of carbon dioxide increases.
D Amount of oxygen evolved increases as carbon dioxide in water is absorbed by sodium bicarbonate.

Read the given passage carefully.
Houseflies go through __a__ stages in their life cycle. The housefly lays hundreds of eggs at a time. Each egg hatches into a __b__ , which is called __c__.
After some days, it becomes barrel-shaped, which is known as __d__ .
Select the option which correctly fills any three blanks.

A a - Four , c - Nymph , d - Cocoon
B b - Larva , c - Maggot , d - Pupa
C a - Three , b - Larva , d - Pupa
D b - Maggot , c - Pupa , d - Nymph