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One of the four identical light bulbs in a series circuit has blown off as shown in the figure.



Which of the following statements is correct about the bulbs?

AR will not glow while P, Q and S will glow as before.
BR will not glow while P, Q and S will glow brighter than before.
CR will glow brighter than before while P, Q and S will glow as before.
DAll the bulbs P, Q, R and S will not glow.

Given below is the net of a cube. If it is folded, then _______ is opposite to the face marked


A

B

C

D

Read the given table and select the correct statements.


(i) L can be rickets resulting in soft and bent bones.
(ii) M can be calcium required for proper vision.
(iii) N includes green leafy vegetables and fruits like spinach, apples, bananas.
(iv) O is goitre which results in bleeding gums.

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

Study the following statements about sedimentary rocks and choose the correct ones.
(i) These were the first rocks to form on Earth.
(ii) These are formed due to physical and chemical changes in metamorphic rocks.
(iii) These are formed by the deposition of material on the Earth's surface and within water bodies.
(iv) Limestone, sandstone and shale are the sedimentary rocks.

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

Door knob is an example of _________.

ALever
BWedge
CWheel and axle
DScrew

_________ is the part of lever on which work has to be done.

AEffort
BLoad
CFulcrum
DAll of these

In layer 'X' of atmosphere, temperature begins to fall. Layer 'X' is known as cold layer. Thus, layer 'X' is ________.

AMesosphere
BTroposphere
CIonosphere
DStratosphere

Select the correct statement regarding natural disasters.

AA vent through which magma is released is present in the mantle of the Earth.
BHurricanes are caused by an earthquake on the ocean floor.
CHeat from lava of volcano can cause forest fire.
DThe point under the ground where the earthquake begins is called epicentre.

Direction: Refer to the given paragraphs to answer question
P is a joint that allows movement in one plane only and shows 180° of movement. The movement of car doors resembles the movement of bones between which this joint is present. This type of joint is found in our body at elbow and in skull. Q joint allows movement in all directions and in more than one plane. This joint controls the movement of the humerus and femur bones. Movement of pestle in a mortar resembles the movement of bones in this joint.

Some of the italicised words are mentioned incorrectly in the paragraphs. Select the correct option regarding them.

AFemur should be replaced by tibia.
B180° should be replaced by 360°.
CMore than should be replaced by only.
DSkull should be replaced by knee.

Direction: Refer to the given paragraphs to answer question
P is a joint that allows movement in one plane only and shows 180° of movement. The movement of car doors resembles the movement of bones between which this joint is present. This type of joint is found in our body at elbow and in skull. Q joint allows movement in all directions and in more than one plane. This joint controls the movement of the humerus and femur bones. Movement of pestle in a mortar resembles the movement of bones in this joint.

The joints P and Q in the above para-graphs are respectively

AHinge joint, Pivot joint
BPivot joint, Ball and socket joint
CGliding joint, Hinge joint
DHinge joint, Ball and socket joint.