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State PSC Science & Technology — practice questions — page 7

Explore 311 free Science & Technology questions in State PSC Science. Open each question or exercise to read its content, reference answers and available explanation.

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Science & Technology questions and exercises with answers

Showing questions 181–210 of 311.

Which body advises Indians on saving petrol and diesel while driving?Read the answer and worked solution →Separating the constituents of petroleum is known as:Read the answer and worked solution →Petrochemicals from petroleum and natural gas are used to make polythene, nylon and:Read the answer and worked solution →Catch the fossil fuelsRead the answer and worked solution →Pop the coal productsRead the answer and worked solution →Run the fuel historyRead the answer and worked solution →Slice the fuel wordsRead the answer and worked solution →From coal or from petroleumRead the answer and worked solution →Sort coal, oil and gasRead the answer and worked solution →Type the numberRead the answer and worked solution →Coal and petroleum bingoRead the answer and worked solution →Microorganisms are classified into four major groups: bacteria, fungi, protozoa and some:Read the answer and worked solution →Viruses differ from other microbes because they reproduce only:Read the answer and worked solution →Polio and chicken pox are caused by:Read the answer and worked solution →A patient has dysentery. Which group of microorganisms causes it, as it does malaria?Read the answer and worked solution →The bacterium that turns milk into curd is:Read the answer and worked solution →Bread dough rises because yeast produces which gas during respiration?Read the answer and worked solution →The conversion of sugar into alcohol by yeast is called:Read the answer and worked solution →Who discovered fermentation in 1857?Read the answer and worked solution →In 1929, Alexander Fleming found a green mould killing bacteria, leading to which antibiotic?Read the answer and worked solution →Antibiotics are not effective against cold and flu because these are caused by:Read the answer and worked solution →Edward Jenner discovered the vaccine for smallpox in:Read the answer and worked solution →When dead or weakened microbes are introduced into the body, the body produces:Read the answer and worked solution →Polio drops given to children under the Pulse Polio Programme are actually a:Read the answer and worked solution →Bacteria and blue green algae that enrich soil with nitrogen from the air are called:Read the answer and worked solution →Disease-causing microorganisms are called:Read the answer and worked solution →The malaria parasite Plasmodium is carried by which mosquito?Read the answer and worked solution →Dengue virus is carried by the female:Read the answer and worked solution →Robert Koch in 1876 discovered the bacterium causing:Read the answer and worked solution →Sodium benzoate and sodium metabisulphite used in jams and squashes are:Read the answer and worked solution →

Worked practice questions

Which body advises Indians on saving petrol and diesel while driving?

  1. BHEL
  2. PCRA
  3. ONGC
  4. NTPC
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Correct answer: B. PCRA

1. It is the Petroleum Conservation Research Association. 2. PCRA gives fuel-saving tips. 3. Switch off at traffic lights and keep tyre pressure right. _Source: syllabus Science, Chapter 5, Coal and Petroleum._

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Separating the constituents of petroleum is known as:

  1. Roasting
  2. Leaching
  3. Refining
  4. Smelting
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Correct answer: C. Refining

1. Petroleum is a mixture of gas, petrol, diesel and wax. 2. Refining separates them. 3. It happens in a petroleum refinery. _Source: syllabus Science, Chapter 5, Coal and Petroleum._

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Petrochemicals from petroleum and natural gas are used to make polythene, nylon and:

  1. Cement mix
  2. Glass wool
  3. Steel bars
  4. Detergents
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Correct answer: D. Detergents

1. Petrochemicals are useful substances from petroleum. 2. Detergents and polyester fibres are examples. 3. Plastics are made too. _Source: syllabus Science, Chapter 5, Coal and Petroleum._

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