Science Content (CTET Paper-II Science): Questions 144 - 147 of 148

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Question number: 144

» Science Content » Basic Chemistry

Appeared in Year: 2012

MCQ▾

Question

The most abundant element found in the earth’s crust is

Choices

Choice (4) Response

a.

Nitrogen

b.

Silicon

c.

Carbon

d.

Oxygen

Question number: 145

» Science Content » Basic Chemistry

Appeared in Year: 2012

MCQ▾

Question

Extraction of copper and iron from their ores involves mainly following steps:

(1) Reduction to metal (2) Enrichment

(3) Refinement (4) Roasting/Calcination

The proper sequence of these steps is (Nov)

Choices

Choice (4) Response

a.

(1), (2), (4), (3)

b.

(1), (4), (2), (3)

c.

(2), (1), (4), (3)

d.

(2), (4), (1), (3)

Question number: 146

» Science Content » Natural Resources

Appeared in Year: 2012

MCQ▾

Question

Select the true statements about biodiversity.

(1) It is maximum in a forest.

(2) It refers to only the flora of a given area.

(3) It refers to the various species of flora and fauna present in an area.

(4) It refers to the total number of individuals of a particular species living in an area.

(Nov)

Choices

Choice (4) Response

a.

(2) and (3)

b.

(1) and (3)

c.

(3) and (4)

d.

(1) and (2)

Question number: 147

» Science Content » World of Living

Appeared in Year: 2012

MCQ▾

Question

Select the correct statements about autotrophs.

  1. They constitute the first trophic level in every food chain.
  2. They convert CO2 and H2O into carbohydrates in the absence of sunlight.
  3. They store carbohydrates in the form of sugars.
  4. They synthesize carbohydrates from CO2 and H2O in the presence of chlorophyll and sunlight. (Nov)

Choices

Choice (4) Response

a.

(3) and (4)

b.

(1) and (4)

c.

(1), (2) and (3)

d.

(1), (3) and (4)

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