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Test: Important Compounds of s-Block


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10 Questions MCQ Test Chemistry Class 11 | Test: Important Compounds of s-Block

Test: Important Compounds of s-Block for NEET 2023 is part of Chemistry Class 11 preparation. The Test: Important Compounds of s-Block questions and answers have been prepared according to the NEET exam syllabus.The Test: Important Compounds of s-Block MCQs are made for NEET 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Important Compounds of s-Block below.
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Test: Important Compounds of s-Block - Question 1

In Castner Kellner cell:

Detailed Solution for Test: Important Compounds of s-Block - Question 1
  • Castner Kellner cell is also called a mercury cathode cell.
  • In this cell, Hg flows along the bottom of the cell and acts as a cathode in the left-hand compartment fitted with graphite anodes in brine (NaCl) solution, whereas the right-hand compartment is fitted with Fe cathodes dipped in very dilute NaOH solution and Hg acts as the anode in this compartment.
  • Thus, Hg acts as an intermediate electrode by induction, cathode on LHS and anode in RHS.

 

Test: Important Compounds of s-Block - Question 2

Heating limestone at a temperature of 1070 K we get:

Detailed Solution for Test: Important Compounds of s-Block - Question 2

Heating limestone at a temperature of 1070K we get quick lime i.e CaO.

CaCO3 ⇌ CaO (s) + CO2 (s)

Additional Information: Calcium oxide can be produced by the thermal decomposition of materials like limestone or seashells that contain calcium carbonate in a lime kiln.

Test: Important Compounds of s-Block - Question 3

Aqueous solution of which of the following compounds is used to detect carbon dioxide:​

Detailed Solution for Test: Important Compounds of s-Block - Question 3

On passing CO2 gas, Ca(OH)2 becomes CaCO3 (milky white ppt.) which proves the presence of CO2.

Test: Important Compounds of s-Block - Question 4

Passing carbon dioxide through slaked lime gives:​

Detailed Solution for Test: Important Compounds of s-Block - Question 4

If CO2 is passed through slaked lime(calcium hydroxide Ca(OH)2), it gives out calcium carbonate (CaCO3) also called marble/limestone.

CO2 + Ca(OH)2→ CaCO3+ H2O

Test: Important Compounds of s-Block - Question 5

Bones and teeth contains:

Detailed Solution for Test: Important Compounds of s-Block - Question 5
  • Teeth are composed of calcium, phosphorus, and other minerals. 
  • Bones contain calcium, phosphorus, sodium and other minerals, but mostly consist of the protein collagen.

Additional Information: The hardest part of the human body, teeth mostly consist of a calcified tissue called dentin. The tooth's dentine tissue is covered in enamel, that hard, shiny layer that you brush.

Test: Important Compounds of s-Block - Question 6

In Castner Kellner cell, electrolyte used is:

Detailed Solution for Test: Important Compounds of s-Block - Question 6

In the Castner-Kellner method NaOH is prepared by the electrolysis of an aqueous solution of NaCl(Brine).

Additional Information: The Castner Kellner process is a method of electrolysis of sodium chloride solution to produce alkali hydroxide. It uses electrolytes of NaCl solution graphite anode and mercury cathode.

Test: Important Compounds of s-Block - Question 7

Milk of lime reacts with chlorine to produce:

Detailed Solution for Test: Important Compounds of s-Block - Question 7

Slaked lime (milk of lime) reacts with chlorine gas to produce the bleaching agent calcium hypochlorite – a common form of 'swimming pool' chlorine.

Test: Important Compounds of s-Block - Question 8

What is washing soda?

Detailed Solution for Test: Important Compounds of s-Block - Question 8
  • Sodium carbonate, Na2CO3, (washing soda) is the water-soluble sodium salt of carbonic acid, well-known domestically for its everyday use as a water softener.
  • Pure sodium carbonate is a white, odorless powder that is hygroscopic (absorbs moisture from the air).
  • It has a strongly alkaline taste and forms a moderately basic solution in water.
Test: Important Compounds of s-Block - Question 9

Pure NaCl is obtained by the process of:

Detailed Solution for Test: Important Compounds of s-Block - Question 9

Crystallization: A chemical solid-liquid separation technique in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs.

Additional Information:

  • Crude sodium chloride, generally obtained by the crystallization of brine solution, contains sodium sulphate, calcium sulphate, calcium chloride and magnesium chloride as impurities.
  • To get pure sodium chloride first the crude sodium chloride is dissolved in a minimum amount of water and filtered to remove insoluble impurities.
  • Now into the saturated solution of sodium chloride hydrogen chloride gas is passed.
  • Then pure sodium chloride crystallizes.
  • The other compounds which are present in small amounts such as MgCl2MgCl2 and CaCl2CaCl2 remain in solution.
Test: Important Compounds of s-Block - Question 10

The formula of bleaching powder is:​

Detailed Solution for Test: Important Compounds of s-Block - Question 10

Calcium hypochlorite is an inorganic compound with the formula Ca(OCl)2. It is the main active ingredient of commercial products called bleaching powder. 

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