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MHT-CET Elements of Groups 16, 17 and 18 — practice questions — page 3

Explore 86 free Elements of Groups 16, 17 and 18 questions in MHT-CET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Elements of Groups 16, 17 and 18 questions and exercises with answers

Showing questions 61–86 of 86.

Ozone shows which magnetic behaviour?Read the answer and worked solution →Ozone is prepared in the laboratory by passing what through dry oxygen?Read the answer and worked solution →About how much of the oxygen is converted to ozone in an ozoniser?Read the answer and worked solution →Why can a high concentration of ozone be dangerously explosive?Read the answer and worked solution →How can sulfur dioxide be prepared simply?Read the answer and worked solution →Moist SO2 decolourises which acidified solution?Read the answer and worked solution →A solution of SO2 in water is known as what?Read the answer and worked solution →At what temperature does liquid sulfur dioxide boil at normal pressure?Read the answer and worked solution →SO2 reacts with Cl2 in the presence of charcoal to form what?Read the answer and worked solution →By which process is sulfuric acid manufactured?Read the answer and worked solution →At what temperature does pure sulfuric acid boil?Read the answer and worked solution →When diluting concentrated H2SO4, what should be done?Read the answer and worked solution →Who discovered chlorine in 1774 by the action of HCl on MnO2?Read the answer and worked solution →What does the Greek word chloros mean?Read the answer and worked solution →Chlorine with cold dilute alkali gives which mixture?Read the answer and worked solution →What is the colour of chlorine gas?Read the answer and worked solution →Bleaching by chlorine is described as what kind of change?Read the answer and worked solution →Excess chlorine reacting with ammonia gives which explosive compound?Read the answer and worked solution →Who first prepared hydrogen chloride by heating salt with conc. sulfuric acid in 1648?Read the answer and worked solution →Aqua regia is a mixture of conc. HCl and conc. HNO3 in what ratio?Read the answer and worked solution →Moist HCl gas can be dried by passing it through what?Read the answer and worked solution →Hydrochloric acid reacting with ammonia gives what visible product?Read the answer and worked solution →In an interhalogen compound XX'n, which atom is X?Read the answer and worked solution →Which interhalogen in glacial acetic acid is Wijs solution?Read the answer and worked solution →What percentage by mass of the earth's crust is sulfur?Read the answer and worked solution →Why are halogens never found free in nature?Read the answer and worked solution →

Worked practice questions

Ozone shows which magnetic behaviour?

  1. Ferromagnetic
  2. Paramagnetic
  3. Antiferromagnetic
  4. Diamagnetic
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Correct answer: D. Diamagnetic

All electrons in ozone are paired, so it is diamagnetic unlike dioxygen.

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Ozone is prepared in the laboratory by passing what through dry oxygen?

  1. A hot glowing metal wire
  2. Silent electric discharge
  3. Strong ultraviolet light
  4. A stream of dry steam
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Correct answer: B. Silent electric discharge

Silent electric discharge in an ozoniser converts part of the oxygen into ozone.

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About how much of the oxygen is converted to ozone in an ozoniser?

  1. About 90 %
  2. Only 10 %
  3. About 50 %
  4. Only 1 %
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Correct answer: B. Only 10 %

The conversion is only about 10 percent, so the product is called ozonised oxygen.

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