Important Questions of The p-Block Elements Chemistry | Zigya

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191.

Moderate electrical conductivity is shown by

  • silica

  • graphite

  • diamond

  • carborundum


192.

Hydrolysis of (CH3)2SiCl2 and CH3SiCl3 leads to:

  • linear chain and cross linked silicones respectively

  • cross linked and linear chain silicones respectively

  • linear chain silicones only

  • cross linked silicones only


193.

Oxidation number of nitrogen in which among the oxides of nitrogen is the lowest?

  • Nitric oxide

  • Nitrous oxide

  • Nitrogen dioxide

  • Nitrogen trioxide


194.

The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:

  • NO2 and NO

  • NO and N2O

  • NO2 and N2O

  • NO2 and N2O

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195.

Which one has the highest boiling point?

  • He

  • Ne

  • Kr

  • Kr

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196.

Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen.

Reason : The reaction between nitrogen and oxygen requires high temperature.

  • Both assertion and reason are correct, but the reason is not the correct explanation for the assertion

  • Both the assertion and reason are incorrect but the reason is not the correct explanation for the assertion.

  • The assertion is incorrect, but the reason is correct

  • The assertion is incorrect, but the reason is correct

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197.

Among the following oxoacids, the correct decreasing order of acid strength is

  • HOCl > HClO2>HClO3 > HClO4

  • HClO4>HOCl> HClO2>HClO3

  • HClO4>HClO3>HClO2>HOCl

  • HClO4>HClO3>HClO2>HOCl

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198.

Which of the following is the wrong statement?

  • ONCl and ONO- are not isoelectronic

  • O3 molecule is linear

  • Ozone is violet-black in solid state

  • Ozone is violet-black in solid state

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199.

The molecule having smallest bond angle is

  • NCl3

  • AsCl3

  • SbCl3

  • SbCl3

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200.

Which of the following statement is wrong?

  • The stability of hydrides increases from NH3 to BiH3 in group 15 of the periodic table.

  • Nitrogen cannot form dπ-pπ bond.

  • Single N - N bond is weaker than the single P - P bond.

  • Single N - N bond is weaker than the single P - P bond.

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