12 Class Fsc Part 2 Short Questions Online Preparation for Chemistry chapter wise

Online Short Questions For Chapter 2 "12th Class Chemistry Chapter 2 Short Questions Preparation "

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Chemistry - 12th Class Chemistry Chapter 2 Short Questions Preparation

Question # 1

Which Elements are called as alkaline earth metals?Why this name is used for these elements?

  • Ans 1: Elements of group IIAare called alkaline earth metals.The alkaline earth metals are beryllium,magnesium,calcium,strontium,barium and radium.They are called alkaline earth metals because they produce alkalies in water and are widely distributed in earth crusts.
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Prepare Complete Set Wise Questions For Chapter 2 "12th Class Chemistry Chapter 2 Short Questions Preparation "

12th Class Chemistry Chapter 2 Short Questions Preparation - Set 1

Question # 1

Which Elements are called as alkaline earth metals?Why this name is used for these elements?

  • Ans 1: Elements of group IIAare called alkaline earth metals.The alkaline earth metals are beryllium,magnesium,calcium,strontium,barium and radium.They are called alkaline earth metals because they produce alkalies in water and are widely distributed in earth crusts.
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12th Class Chemistry Chapter 2 Short Questions Preparation - Set 2

Question # 1

Write the formulas of:a) Beryl b) Sylvite.

  • Ans 1: a) Beryl b)Be3Al2(SiO3)2 c) Sylvite d) KCl
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12th Class Chemistry Chapter 2 Short Questions Preparation - Set 3

Question # 1

Lithium is least reactive element of all alkali metals.

  • Ans 1: Lithium is least reactive element of all alkali metals because of its small radius and high charge density.The nuclear charge of Li+ion is screened only by a shell of two electrons.The so called anomalous properties of lithium are due to the fact that lithium is unexpectedly far less electropositive than other alkali metals.
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12th Class Chemistry Chapter 2 Short Questions Preparation - Set 4

Question # 1

How potassium superoxide KO2has very interesting use in breathing equipment for mountains and space crafts?

  • Ans 1: Potassium superoxide KO2has very interesting use in breathing equipment for mountaineers space crafts because it has ability to absord carbon dioxide while giving out oxygen at the same time as: KO2+ 2CO2---> 2K2CO3+ 3O2
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12th Class Chemistry Chapter 2 Preparation

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