User Forum

Observe the methods of separation in the given figures(i) and (ii) and select the correct statement(s).

I. Method (i) can be used to separate butter from milk.
II. Method (ii) can be used to separate petrol and water mixture and petrol forms the upper layer.
III. Method (ii) can be used to separate glycerine and water mixture and glycerine forms the upper layer.
IV. Method (i) can be used to separate grains from stalks.

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

Two plants are placed in transparent plastic bags as shown in the given figure.

What does this experiment show?

A Leaves release water vapours during transpiration.
B Plants absorb water only through their roots.
C Petroleum jelly increases water absorption through the leaves.
D Water droplets appear due to water absorption from the soil.

The given figure shows a circuit which contains two identical lamps. When the switch is closed, which of the following statements best describes, what happened to lamps P and Q?


A P is brighter than before, but Q does not light up.
B P does not light up, but Q is brighter than before.
C Both P and Q are brighter than before.
D P and Q both will not light up.

Select the incorrect statements.
(i) Carnivores have strong premolars and molars for chewing the flesh.
(ii) Rodents have sharp and strong front teeth.
(iii) Omnivores lack sharp incisors.
(iv) Herbivores have sharp canines for tearing leaves.

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

The image of the teeth seen by a dentist while testing teeth is

A Erect and real by using convex mirror.
B Erect and virtual by using concave mirror.
C Inverted and real by using concave mirror.
D Inverted and real by using convex mirror.

Yash found four 1 litre water bottles in his fridge labelled as P, Q, R and S respectively.
He saw that bottles P and Q were exactly half-filled whereas bottles R and S were completely filled with water. He mixed the water of bottles P and R in container I and that of bottles Q and S in container II.
Which of the following statements is/are incorrect regarding the volume of water in both the containers?
(i) The volume of water in container I is more than water in container II.
(ii) The volume of water in container II is more than water in container I.
(iii) The volume of water in both the containers is same.

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

The figure shown is an elliptical orbit along which a planet revolves around the Sun. Let the velocity of the planet at points P and Q be v₁ and v₂, respectively. Then, the possible relationship between magnitudes of v₁ and v₂ is


A v₁ < v₂
B v₁ = v₂
C v₁ > v₂
D v₁ v₂= 1

Identify the incorrect statements regarding reaction of calcium oxide with water.

(i) It is an endothermic reaction.
(ii) Slaked lime is produced.
(iii) Quick lime is produced.
(iv) It is a combination reaction.

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

Refer to the given food chain and select the option that correctly fills the blank.
Grass → Grasshopper → Frog → Snake → Eagle P is a producer, Q is a primary consumer, and R is a quaternary consumer.

Rocks formed when magma cools beneath the Earth’s surface are called _______ rocks, while rocks formed by the weathering and erosion of pre-existing rocks are called _______ rocks.

A Igneous, Sedimentary
B Sedimentary, Igneous
C Metamorphic, Igneous
D Sedimentary, Metamorphic