NSO Level 1- Science Olympiad (SOF) Class 7: Questions 20 - 24 of 597

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Question 20

Question

MCQ▾

If we numbering colors of rainbow from 1 to 7 in direction of top to bottom, which one of the following color comes at number 3?

Choices

Choice (4)Response

a.

Green

b.

Yellow

c.

Blue

d.

All of the above

Question 21

Question

Match List-Ⅰ List-Ⅱ▾

Match the following,

List-Ⅰ (Column I)List-Ⅱ (Column II)
(A)

Plane mirror

(i)

Can form image of objects spread over a large area

(B)

Convex mirror

(ii)

Used as a magnifying lens

(C)

Concave mirror

(iii)

The image is erect and of the same size as the object.

(D)

Convex lens

(iv)

Used by dentist to see enlarge image of teeth

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (i)
  • (iii)
  • (ii)
  • (iv)

b.

  • (iv)
  • (iii)
  • (i)
  • (ii)

c.

  • (iii)
  • (i)
  • (iv)
  • (ii)

d.

  • (i)
  • (iii)
  • (iv)
  • (ii)

Question 22

Question

MCQ▾

The images formed on the retina are:

Choices

Choice (4)Response

a.

Cannot decide

b.

Virtual images

c.

Real images

d.

Either Real image or Virtual image

Question 23

Question

MCQ▾

If we placed an object at the centre of the curveture of the convex lens, then image is at:

Choices

Choice (4)Response

a.

With in the focal length

b.

At center of the curveture

c.

Cannot formed image

d.

Between focal point and centre of the curveture

Question 24

Question

MCQ▾

In following figure, identify the angle of incident.

Ray Diagram of Reflection

Choices

Choice (4)Response

a.

b.

c.

d.

Developed by: