NSO Level 1- Science Olympiad (SOF) Class 8: Questions 145 - 149 of 1076
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Question number: 145
Question
There are some statements given below.
I. In fractional distillation process, substances with high boiling points condense at the top and substances with low boiling points condense at the bottom.
II. Petrochemicals are used in the manufacture of detergents, fibres, polythene and other man made plastics.
III. Coal tar is used to manufacture of graphite and calcium carbonate.
IV. Paraffin waxes are derived from petroleum
Which of the following statements are incorrect and mark the appropriate option?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | III and IV only |
|
| b. | I and III only |
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| c. | II and IV only |
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| d. | II and III only |
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Question number: 146
Question
In which of the following label parts, natural gas is present in the earth?
Image Showing Earth Surface.
Image showing Earth surface.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | S |
|
| b. | Q |
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| c. | R |
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| d. | P |
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Question number: 147
Question
Refining is
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Separation of various fractions of petroleum |
|
| b. | Extracting petroleum gas |
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| c. | Heating of coal |
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| d. | Sedimentation of fossil fuel |
|
Question number: 148
Question
Which of the following was used in railway engines to produce steam to run the engine in olden years and now used in thermal power production?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Coal |
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| b. | Coke |
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| c. | Coal gas |
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| d. | Coal tar |
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Question number: 149
Question
Match the column I with column II and select the correct answer from the codes given below:
| List-Ⅰ (Column I) | List-Ⅱ (Column II) |
|---|---|
| (A) Coal | (i) Is a Fossil fuels |
| (B) Coke is | (ii) Used to manufacture Explosives |
| (C) Coal tar | (iii) Porous solid |
Choices
| Choice (4) | Response | |
|---|---|---|
| ||
| a. |
|
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| b. |
|
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| c. |
|
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| d. | All of the above |
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