NSO Level 1- Science Olympiad (SOF) Class 10: Questions 305 - 309 of 986

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Question number: 305

» Heredity and Evolution

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MCQ▾

Question

The original fossil creates an impression on the surrounding rock creating a mold. This type method for fossilization is called as

Choices

Choice (4)Response

a.

Impression

b.

Carbonization

c.

Imprinting

d.

Mold and Cast

Question number: 306

» Life Processes

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Match List-Ⅰ List-Ⅱ▾

Question

Match the phytohormones of column I with role played by them in column II and select the correct option from the codes given below:

List-Ⅰ (Column I)List-Ⅱ (Column II)

(A)

Cytokinin

(i)

Falling of fruits and flowers.

(B)

Abscisic acid

(ii)

Cell growth of stem

(C)

Gibberellins

(iii)

Ripening of fruits in plants.

(D)

Ethylene

(iv)

Breaking dormancy of buds and seeds

Choices

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

a.

  • (ii)
  • (iv)
  • (iii)
  • (i)

b.

  • (iv)
  • (i)
  • (ii)
  • (iii)

c.

  • (iv)
  • (iii)
  • (ii)
  • (i)

d.

  • (i)
  • (ii)
  • (iii)
  • (iv)

Question number: 307

» Periodic Classification of Elements

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MCQ▾

Question

Which of the following trends is not a physical property?

Choices

Choice (4)Response

a.

Anomalous

b.

Metallic and non-metallic

c.

Valency

d.

Atomic size

Question number: 308

» Periodic Classification of Elements

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MCQ▾

Question

Which element is not reacting with oxygen?

Choices

Choice (4)Response

a.

Sodium

b.

Nitrogen

c.

Boron

d.

Helium

Question number: 309

» Human Eye and Colourful World

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MCQ▾

Question

Which of the following is not correct for primary rainbow?

Choices

Choice (4)Response

a.

Shorted wavelength of visible light appearing at the innermost portion of the ring

b.

Red color is on the outside and violet colors is on the inside

c.

Involves two reflections inside the falling droplets

d.

The brightest than secondary rainbow

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