NSO Level 1- Science Olympiad (SOF) Class 10: Questions 146 - 148 of 986

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Question number: 146

» Mental Ability

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Appeared in Year: 2011

MCQ▾

Question

On a page of a telephone directory, there are 300 telephone numbers. The frequency distribution of the digits at the unit’s place is given below:

Table shows the frequency distribution

Table shows the frequency distribution

Unit digit

0

1

2

3

4

5

6

7

8

9

Frequency

35

21

28

30

25

14

16

38

38

55

Without looking at the page, a number is chosen at random from the page. What is the probability that the digit at the unit’s place of the number chosen is greater than 3 but less than 9?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 147

» Mental Ability

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MCQ▾

Question

In the following question, arrange the given words in the sequence in which they occur in the directory and then choose the correct sequence.

1. Knit

2. Knife

3. Knowledge

4. Knock

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 148

» Acids, Bases and Salts

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Match List-Ⅰ List-Ⅱ▾

Question

Match both the columns and, mark the correct option from the codes given below.

List-Ⅰ (Column I) List-Ⅱ (Column II)

(A)

Bleaching power

(i)

It’s used as an oxidising agent in many chemical industries

(B)

Washing soda

(ii)

It is used for removing the permanent hardness water

(C)

Sodium bicarbonate

(iii)

It is used in soda-acid fire extinguishers.

Choices

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

a.

  • (i)
  • (ii)
  • (iii)

b.

  • (iii)
  • (ii)
  • (i)

c.

  • (iii)
  • (i)
  • (ii)

d.

All of the above