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Haryana Patwari Exam, 2015

📆 October 29, 2024

Total Questions: 100

1. What is laughing gas.

Correct Answer: (1) Nitrous oxide
Solution:
  • (1) Nitrous oxide (N₂O) is known as the laughing Gas. It is an oxide of Nitrogen. It is called laughing gas due to the euphoric effects of inhaling it. A property that has led to its recreational use as a dissociative anesthetic. It is also used as an oxidizer in hybrid rocket engines of prior design.

2. Why is red light used in traffic signal.

Correct Answer: (3) Its wavelength is highest and can be seen from long distance
Solution:
  • (3) The primary reason why is the colour red used in traffic signal is because it is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power at the wavelength of color. The wavelength of red light is maximum so red light is able to travel the longest distance through fog, rain and the alike.

3. Carbon monoxide is a flammable gas, which of the following gases is also flammable

Correct Answer: (4) Hydrogen
Solution:
  • (4) To be flammable the substance should have ability to react with oxygen. Hydrogen is the most flammable gas because it reacts faster with oxygen to form water it is able to do this because it has one free electron in its outer core, means it can react with oxygen atoms.

4. From which part of the plant turmeric is obtained?

Correct Answer: (2) Stem
Solution:(1) Turmeric is obtained from underground stems of Rhizomes of curcuma longa plant which is perennial herbaceous of ginger family. Hence, they are stems or tubers, which seems to be a root but they are not. It can be said pseudo root, it is covered with yellowish brown sections

5. ‘Angioplasty’ is a process to clean which part of human body.

Correct Answer: (3) Blocked heart arteries
Solution:(3) Angioplasty is a procedure to remove blockage of arteries and to enlarge the artery. A catheter with a small balloon tip is guided into a widen in the artery, the balloon is inflated to push the plaque and stretch the artery open to boost flow to the heart. This procedure is also called stent

6. What is the Main Constituent of natural gas.

Correct Answer: (1) Methane
Solution:(1) Natural gas is the mixture of naturally found Hydro carbon gas. Which is primarily composed of methane, but also contains ethane; propane and heavier hydrocarbons. It also contains small amount of nitrogen, carbon dioxide, hydrogen sulphide and traces of water

7. What is obtained when a bar magnet is split into two pieces?

Correct Answer: (3) Two small full magnets
Solution:(3) When we split magnet in two pieces then we get newly cut faces with new north or south poles although the power of magnet relies on the size of it.

8. Fill in the blank.

An employment advertisement should _______ the number of vacancies.

Correct Answer: (2) specify
Solution:
  • (2) Specify (Verb) = विषय वस्तु से उल्लेख करना (to state something especially by giving an exact measurement, time, exact instructions etc.)

9. Choose the word that best expresses the meaning of the word in bold.

I'm itching to tell you the news.

Correct Answer: (2) feel restless
Solution:(2) Itch (Verb) = कामना करना, बहुत चाहना, खुजलाना (to want to do something very much; to feel restless).

10. Choose the word that best expresses the meaning of the word in bold.

They are asking a preposterous price for the work.

Correct Answer: (2) unreasonable
Solution:(2) Preposterous (Adjective) = बेतुका, निरर्थक, असंगत (completely unreasonable; outrageous).
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