NSO Level 1- Science Olympiad (SOF) Class 10: Questions 924 - 927 of 986

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Question number: 924

» Chemical Reactions and Equation

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MCQ▾

Question

Zinc filings were added to a solution of Zinc sulphate. After miniutes, it was observed that the colour solution changed and a deposit at the bottom of the beaker was observed. The colour of the solution and that of the deposit would respectively be

Choices

Choice (4)Response

a.

Yellow and green

b.

Colorless

c.

Red and greenish-blue

d.

Green and reddish-brown

Question number: 925

» 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)

Appy fizz

(i)

6.7

(B)

Blood

(ii)

3.5

(C)

Pond Water

(iii)

8.2

(D)

Milk

(iv)

7.4

Choices

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

a.

  • (iii)
  • (i)
  • (ii)
  • (iv)

b.

  • (ii)
  • (iv)
  • (iii)
  • (i)

c.

  • (iv)
  • (i)
  • (ii)
  • (iii)

d.

  • (i)
  • (ii)
  • (iv)
  • (iii)

Question number: 926

» Acids, Bases and Salts

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MCQ▾

Question

Read the given statements and mark the correct option.

Statement 1: pH of hydrochloride acid solution is less than that of Lemon juice solution of the same concentrate.

Statement 2: Pure alcohol has a less pH value then water.

Choices

Choice (4)Response

a.

Only statement 2 is Correct

b.

Only statement 1 is Correct

c.

Question does not provide sufficient data or is vague

d.

None of the above

Passage

Directional: Read the passage carefully and the answer the below two question

Optical fibers are generally composed of silica, with an index of refraction around

Question number: 927 (1 of 2 Based on Passage) Show Passage

» Light - Reflection and Refraction

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MCQ▾

Question

How long will it take for that light to travel from St. Petersburg, Florida to Anchorage, Alaska?

Choices

Choice (4)Response

a.

20.2 s

b.

39 s

c.

29.2 s

d.

32 s

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