Find the Fsc part 2 Online Preparation For Chemistry Chapter 6 (Transition Elements)

Question # 1

Define Sacrificial corrosion.

Ans 1: If a protective layer of zinc is damaged a galvanic cell is established in the presence of moisture,Iron serves as a cathode and zinc as an anode,Electrons flow from zinc to iron as a result of which Zn decays while Fe remains intact,This is called sacrificial corrosion.

Question # 2

Why Transition metals show variable valencies?

Ans 1: Transition metals exhibit variable valence or oxidation states .They show variable valencies because of the involvement of the unpaired d electron to s electron in bond information.

Question # 3

Write name of following complexes:
1.K_{2 (}Cu(CN₄))

Ans 1: Names of K_{2 (}Cu(CN₄)) : Potassium tetracyanocuprate

Question # 4

What is the cause of paramagnetic behaviour?

Ans 1: Paramagnetic behaviour is caused by the presence of unpaired electrons in an atom.molecule or ion because there is magnetic moment a associated with the spinning electrons,It increase with the increase in the number of unpaired electrons.

Question # 5

What are Chelates?

Ans 1: When all the donor atoms of a polydentate ligand get coordinated with the same metal ion,a complex is formed which contain one or more rings in its structure and hence is called Chelate,

Question # 6

How does process of galvanizing protect iron from rusting?

Ans 1: Galvanizing is done by dipping a sheet of iron in zinc chloride solution and heating,The iron sheet is then removed,rolled into zinc bath and then cooled,In this case it a protective layer of zinc is damages a galvanic cell is established in the presence of moisture,Iron serves as cathode and zinc serve as anode. Electron flow from zinc to iron ,as a result of which Zn decays while Fe remains intact,This is called sacrificial corrosion,This is the way galvanizing helps protecting iron from rust.

Question # 7

Name different forms of iron and which is the purest.

Ans 1: Pig iron or case iron : 2.5 to 4.5% Carbon
Wrought iron: 0.12 to 0.25 carbon
Steel : 0.25 - 2.5% Carbon
Purest form of iron is Wrought iron.

Question # 8

Write two uses ofK2Cr2O7.

Ans 1:
1. K2Cr2O7finds extensive use in dyeing,
2. It is used in leather industries for chrome tanning.

Question # 9

How chromate ions are converted into dichromate ions?

Ans 1: Chromate and dichromate ions exist in equilibrium as :
CrO4^-2+2H⁺--------- Cr₂O₇^-2+H₂O
On adding the equilibrium will shift towards right and chromate ions will converted into dichromate ions.

Question # 10

What is Tin Plating ?

Ans 1: The process of tin plating consists of dipping the clean sheet of iron in a bath of molten tin and then passing it through hot pair of roller.

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Fsc part 2 Online Preparation For Chemistry Chapter 6 (Transition Elements)

Online Short Questions For Chapter 6 "12th Class Chemistry Chapter 6 Short Questions Preparation "

Chemistry - 12th Class Chemistry Chapter 6 Short Questions Preparation

Define Sacrificial corrosion.

Why Transition metals show variable valencies?

Write name of following complexes:1.K2 (Cu(CN4))

What is the cause of paramagnetic behaviour?

What are Chelates?

How does process of galvanizing protect iron from rusting?

Name different forms of iron and which is the purest.

Write two uses ofK2Cr2O7.

How chromate ions are converted into dichromate ions?

What is Tin Plating ?

Prepare Complete Set Wise Questions For Chapter 6 "12th Class Chemistry Chapter 6 Short Questions Preparation "

Set 1

Set 2

Set 3

12th Class Chemistry Chapter 6 Short Questions Preparation - Set 1

Define Sacrificial corrosion.

Why Transition metals show variable valencies?

Write name of following complexes:1.K2 (Cu(CN4))

What is the cause of paramagnetic behaviour?

What are Chelates?

How does process of galvanizing protect iron from rusting?

Name different forms of iron and which is the purest.

Write two uses ofK2Cr2O7.

How chromate ions are converted into dichromate ions?

What is Tin Plating ?

12th Class Chemistry Chapter 6 Short Questions Preparation - Set 2

What is meat by Coordination sphere ?

Define substitutional alloy?Give an example.

Explain chromyl chloride.

What is the cause of paramagnetic behaviour?

Define Ligand.

How chromate ions are converted into dichromate ions?

Write name of following complexes:1.K2 (Cu(CN4))

What type of elements form substitution alloy and why?

Define Sacrificial corrosion.

How does process of galvanizing protect iron from rusting?

12th Class Chemistry Chapter 6 Short Questions Preparation - Set 3

Write two uses ofK2Cr2O7.

What are Chelates?

Define Sacrificial corrosion.

How the entrapped gases are removed form the steel?

Define substitutional alloy?Give an example.

What do you mean by Ligand and Coordination sphere?

Write down the chemical formulas of1.Magnetite2.Haematite

What is medium carbon steel.Also write its uses.

Name different forms of iron and which is the purest.

What are Chelate and what they contain?

12th Class Chemistry Chapter 6 Preparation

Write name of following complexes:
1.K_{2 (}Cu(CN₄))

Write name of following complexes:
1.K_{2 (}Cu(CN₄))

Write name of following complexes:
1.K_{2 (}Cu(CN₄))

Write down the chemical formulas of
1.Magnetite
2.Haematite