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Which of the following steps is/are incorrect while constructing an angle of 120°?
Step 1 : Draw any line MN and take a point C on line.
Step 2 : Place the pointer of the compass at C and draw an arc of convenient radius which cuts the line at A.
Step 3 : Without disturbing the radius on the compass draw an arc with A as centre which cuts the first arc at B.
Step 4 : Again without disturbing the radius on the compass and with M as centre, draw an arc with O which cuts the first arc at C.
Step 5 : Join OA. ∠ OAN is the required angle of measure 120°.

A Only step 1
B Both step 4 and step 5
C Only step 5
D Only step 2

One way animals usually respond to a sudden drop in temperature is by

Asweating
Bshivering
Cblinking
Dsalivating

(A) Lamp L₁ will light up when either L₂ or L₃ are lighted.

(B) Electricity will flow only when all the switches are closed.

(C) Current flowing through L₁ and L₂ are equal.

The given figure represents the stomach of ruminants with its four chambers labelled as P, Q, R and S. Which chambers allow grazing animals like sheep, cattle etc. to efficiently digest cellulose, a common carbohydrate in plants and how ?

(A) P, Q, S; these chambers secrete cellulase enzyme.

(B) P and Q; these chambers contain billions of bacteria that digest cellulose.

(C) R and S; these chambers contain billions of bacteria that digest cellulose.

Observe the picture. Which system(s) of the boy's body is/are involved in helping him to escape?

(A) (d) only

(B) (d) and (e)

(C) (d), (e) and (f)

Rina puts a magnet near object L. The south pole of the magnet attracts both parts J and K of the object L. Which of the following statements are true ?

1. Object L is made of steel.

2. Object L is made of copper.

3. The north pole of the magnet will attract part J of object L.

4. The north pole of the magnet will attract part K of object L.

(A) 1 and 3

(B) 2 and 4

(C) 1, 3 and 4

Which layers of an egg perform the following functions?
1.  Protects the embryo and provides it with water.
2.  Provides food to the developing baby.

                1                        2

A Egg shell             Yolk
B Albumin              Yolk
C Yolk                     Embryo
D Albumin               Embryo

Fossil fuels formed over a long period of time because heat and pressure were applied to

A Nitrogen mixed in the water
B Organisms buried in the ground
C Carbon filtered through limestone
D Bacteria on top of the mud

The given set-up shows the separation process of a mixture of water and materials X and Y.
X and Y respectively are_______.


A Mud and salt
B Salt and sugar
C Sugar and salt
D Mud and clay

Read the given statements and select the correct option.
Statement 1 : Constructing bunds or small check dams helps in recharging the aquifers.
Statement 2 : Bunds or small check dams trap the water or slow its flow and provide more time for water to percolate down.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.