Question # 1

Which of the following is not an alkali metal.

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Potassium

Francium

Sodium

Strontium

Argon is used in filling of.

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Discharge tubes

Luminous tube

Fluorescent tubes

None of above

Which of the following elements has the highest value of IE.

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Na

K

Mg

Ca

What element is the most abundant by mass in the Earth's crust.

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Fe

H

O

K

Aluminum is usually extracted from

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Bauxite

Corundum

Feldepar

Alumite

Which one of the following statements if false with respect to CFT.

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In an octahederal crystal field. the d electron on a metal ion occupy the ex of orbitals before they occupy the t98 not of orbitals.

Diamagnetic metal ions cannot have an odd number of electrons

Low spin complexes can be paramagnetic

Low spin complexes contain strong field ligands.

Stainless steel consists of which elements.

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Fe only

Cr only

Fe and Ni

Fe ,Ni and Cr

Which one of the following noble gas is obtained by radioactive disintegrastion

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Kr

Br

Rn

Xe

The element having electronic configuration 1s2, 2s2, 3s2, 3p3 is.

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Trivalent only

Tetravalent only

Trivalent and pentavalent

Pentavalent only

Beryllium shows diagonal relationship with.

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Mg

Al

Na

B

In the formation of H2O molecule, the oxygen atom makes use of.

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2p orbitals

sp hybrid orbitals

Sp2 hybrid orbitals

Sp3 hybrid orbitals

Which of the following is the weakest base.

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KOH

NaOH

LiOH

RbOH

Which of the following is not an ore of Cr.

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Chrome iron

Nicollite

Crocisite

Chrome ochre

BCl3 is an example of hybridization

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sp

sp2

sp3

None of above

Noble gases are used in discharge tubes to give different colours. Raddish orange glow is due to.

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Ar

Ne

Xe

Kr

Pick out the incorrect statement about K2Cr2O7

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It is thermally stable

It dissolves in alkali to form chromate

It oxidizes acidified FeSO4 solution to Fe2(SO4)3

It is used as cleansing agent for glassware. etc. When mixed with cold con. H2SO4

Which of the following ions does not have the electronic configuration same as that of neon.

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F-

O2-

Na+

Ca2+

Formula of orthophosphoric acid.

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H2PO4

H3PO3

H3PO2

H4P2O5

The first ionization energy of Mg is lower than

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Na

Ca

Al

Be

Which one of the following is not formed when an electric discharge passes through helium.

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HeH+

HeH2+

He2+

He2-

Un-like s -block elements d-block elements form which compounds as well

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ionic compounds

Co valent compound

Co ordinate compounds

None of above

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