Chemistry Part- 11 Chapter # 06 Total marks : 74

Chemistry Part IIChapter # 06: Transition ElementsTotal marks: 74Q.I. (A) Fill in the blanks. 17 One of the test for chloride ion, which is done with the help of K2Cr2O7 and H2SO4 is called --------- Prevention of corrosion is very important because --------------- of annual production of iron is eaten away.

The entrapped bubbles of gases, in molten steel are called ---------------------------- they are removed by using aluminum.

Bessemer converter is -------------------------- shaped vessel made up of steel plates.

Steel is manufactured by two well known processes that is ------------------------- & ----------------------.

The percentage of carbon is minimum in ----------------------- iron & maximum in --------------- iron.

The atomic radii of d-block elements ------------------------- from left to right, but the variation is not prominent.

The property of paramagnetic is due to ----------------- electrons.

The presence of ----------------- in a metal promotes corrosion.

In an aqueous solution, chromates and dichromates exist in the form of ----------------.

Elements of 2-B and 3-B are called ------------------------- transition elements.

While naming the transition metal complexes, the negative ligands end in ------ while positive ligands end in ium. The semi-solid mass during the manufacture of wrought iron, taken out in the form of balls is called -------------------------.

Temperature for the open hearth furnace is maintained around --------------------.

When the tin coated iron sheets are passed through the roller, the process is called ----. Chromates are the salts of -------------------- while dichromates are the salts of ---------.

All the dichromates are strong ----------------- agents.

Q.I. (B) Multiple Choice Questions. 15 As percentage of C increases in iron its hardness:

(a) increases (b) decreases (c) remain same (d) can not be predicted

Transition elements form complexes due to reason they have:

(a) colored compounds (b) vacant d-orbital (c) large nuclear charge (d) small cation size

Which of following cation has maximum unpaired electrons?

(a) Ni+2 (b) Co+2 (c) Mn+2 (d) Fe+2 The strength of binding energy of transition elements depends upon:

(a) no. of unpaired electrons (b) no. of electrons (c) no. of protons (d) no. of neutrons

Which is the formula of tetra amine chloronitro platinum (IV) sulphate?

(a) [Pt(NH3)4(NO2)Cl]SO4 (b) [Pt Cl (NO2)(NH3)4]SO4 (c) [Pt (NO2) Cl(NH3)4]SO4 (d) none

Which of the following is a typical transition metals:

(a) Sc (b) Co (c) Ra (d) Y

Group 4-B of transition elements contains:

(a) Cr, Mo, W (b) Zn, Cd,Hg (c) Fe, Ru, Os (d) Mn, Te , Re

Coordinate no. of Pt in [Pt Cl(NO2)(NH3)4]-2 (a) -2 (b) 4 (c) 6 (d) 1 The highest oxidation state of Mn is there in which of the following compound:

(a) K2MnO4 (b) KMnO4 (c) methane (d) propane

Which one of the following catalyses the rusting of iron:

(a) H+ (b) Zn (c) Fe (d) O2 Bessemer converter is used for the manufacture of: (a) steel (b) cast iron (c) wrought iron (d) pig iron

What is pig iron: (a) cast iron (b) impure sulphide ore of iron (c) wrought iron (d) Alloy of steel

Puddling process is used in the manufacture of: (a) Wrought iron (b) steel (c) cast iron (d) pig iron

Stainless steel contain iron and: (a) Al (b) Cr (c) Ag (d) Cu

Chromyl chloride test is performed to confirm: (a) Cl- (b) SO4-2 (c) PO4-3 (d) Cr+3Q.I. (C) Column Matching.

In the following chart, there are nine points. Match information of column A

with the column B and complete it in column C. (12)

1.

Column AColumn BColumn C

CrO4-2Trigonal

Medium steel Tetrahedral

MnSiO3Rails

BronzeCutting tools

Absorption of light Slag

Steel manufacture Zn & Al

CaSiO3Zn &Cu

SiO2Color

d2sp3Open hearth process

Non stoichiometric Slage

Mechanical propertiesAcidic lining

Interstitial compoundsoctahedral

Iron oxides

Binding energy

spaces

2. (4)

Column AColumn BColumn C

Cu Ag AuOuter transition elements

d2sp3Coinage metals

Mechanical properties depends uponOctahedral

Dolomite Trigonal bipyramidal

Binding energy

Electron affinity

Basic lining

Acidic lining

SUBJECTIVE

Q.2 Write a brief and concise answer for each question. 20

How KMnO4 & H2SO4 act as oxidizing agent? 2 Give the uses of KMnO4. 2

Give the structure of dichromate ion. 2 What is Para magnetism? 2 What are chelates? 2 What is stadelers process for preparation of KMnO4? 2

What is sacrificial corrosion? 2

Define corrosion. 2 What do you means by cathode coating? 2

What are chromate & dichromates? 2

Q.3 Describe the Open Hearth process for steel manufacture. 6