Question # 1

The solution of the transition metal complexes having one or more unpaired electrons in the d-orbital are.

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Coloured

Colourless

White

None of above

The valence shell electronic configuration of group III A is.

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ns1 p2

ns2 p1

ns3p2

ns2p2

In the Mendeleev's periodic table elements are arranged in the increasing order of their .

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Numbers of neutrone.

Atomic number

Atomic mass

Atomic volume

In urea the amount of nitrogen is

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82.0%

46.0%

33.0%

21.0%

in monel metal copper is alloyed wiht which metal.

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Fe

Mn

Ni

All

Setting of cement is improved by

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Lime stone

Clay

Gypsum

Water

The following oxo acids have been arranged in the order decreasir acid strength identify the correct order.

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III > IV > II > I

III > II > I >IV

I > II >III > IV

IV > III > II > I

Lewis concept explain the formation of

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Ionic bond

Covalent bond

Co-ordinate bond

Chemical bond

Since the acid gives both acidic and normal salts so the acid is.

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di acid

di basic

double salt

Any of above

Select the correct IUPAC name for [FeF4(OH)2]-

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Diaquatrafluoriron (III) ion

Diaquateratrafluoriferrate (III) ion

Diaquatertrafluoroiron (I)

None of these

In bi sulphate ion, the formal charge on sulphru atom is.

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+1

+2

+4

+6

The one in which the acceptor atom is of low positive charge, Large size and has several outer electrons which can be easily excited is a.

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Soft base

Hard Base

Soft acid

Hard acid

Which of the following hydroxides is most stable.

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Mg (OH)2

Ca(OH)2

Sr (OH)2

Ba (OH)2

Select the correct IUPAC nae for [Co(NH3)6 ]2+

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Hexammoniacobaltate (II) ion

Hexaamminecobaltate (II) ion

Hexammoniacobalt (II) ion

Hexaamminecobalt (II) ion

In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ion ends up in.

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Slag

Gangue

Metallic calcium

Calcium carbonate

Which of the following is most soluble in water

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CaSO4

Sr SO4

MgSO4

BaSO4

Ionic bond are also forces called as.

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Polar bond

Electrovalent bond

None polar bond

Both A and B

The elements with highest electron affinity belongs to.

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Period 2 , group 17

Period 3, group 17

Period 2, group 18

Period, 2 , group 1

Which number of halogen family does not show positive oxidation state.

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Fluorine

Chlorine

Bromine

Iodine

Electron affinities of halogens are in the order.

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F > Cl > Br > I

Cl > F > Br > I

Cl > Br > I > F

Cl > Br > F > I

AI Cl3 acts as a strong Lewis acid, because it is.

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A covalent compound

Readily hydrolyzed

Electron deficient

An ionic compound

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