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Chemistry Class 12 Chapter 6
Transition Elements
Test 10
1.
In production of wrought iron, impurities are removed in the form of?
Oxides
Slag
Silicates
Carbonates
2.
In steel the concentration of carbon is?
1-2%
2-4%
2.5-4.5%
.2-.25%
3.
tassium permagnate is used as a?
Hydrating agent
Oxidizing agent
Reducing agent
None of these
4.
Steel is produced when C is added to?
Cast iron
Wrought iron
Pig iron
All of these
5.
In open hearth process C is removed in the form of?
CO
CO
2
Coal
Graphite
6.
Which is not the property of mild steel?
Malleable
Ductile
Used in cutting tools
All of these
7.
Elements of group IIB and IIIB are?
Metal transition elements
Non-metal transition elements
Typical transition elements
Non-typical transition elements
8.
Lone pair of electrons provided by ligand to central atom is called?
Co-ordination No
Co-ordination sphere
Charge on co-ordination sphere
None of these
9.
Which is the property of corrosion?
Active metals are corroded rapidly
Purities in metals promote corrosion
Water is main source of corrosion
All of these
10.
Salt of chromic acid are known as?
Chromates
Dichromates
Chromites
Potassium chromites
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