Question # 1

Considering the elements B, Al, Mg and K , the correct order of their metallic character is.

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B > Al > Mg > K

Al > Mg > B > K

Mg > Al > K > B

K > Mg > Al > B

Which property is not exhibited by carbon in its compounds.

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Forming bounds to other carbon atoms

Formation multiple forms

Exhibiting allotropic forms

Forming compounds with coordination number beyond four

A covalent bond which is formed between two atoms by the overlap of atomic orbitals along their axis is called.

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Pi bond

Sigma bond

Polar bond

Non polar bond

Nitrogen (N2)) is relatively unreactive because.

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Its electronegativity is high

Its dissociation energy is large

Its atomic radius is small

It is the first element of group 15

Which of the following steps are involved in the extraction of copper.

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Roasting

Smelting

Refining

All

Which of the following statements is worng.

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Covalent compounds are generally soluble is polar solvents

Covalent compounds have low melting and boiling point.

Ionic solids do not conduct electricity is solid state

Ionic compounds conduct electricity in the fused state.

HCIO evolves Cl2 and O2 when dissolve

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Ca

Ni

Cu

Any of above

According to SHAH concept the Lewis bases were classified on the basis os.

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Charge ion size

Polarization consideration

Electron and co coordinating ability

All of above

Which one of the following oxides is basic.

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MnO

Mn2O3

MnO2

Mn2O7

Which of the following elements has the highest ionization energy.

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Na

Si

Ar

Cl

Hemimorphite is an example of.

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Orthosilicate

Pyrosilicate

Cyclic silicate

Meta silicate

Aluminium is used for.

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Making ultensile & framea

Making alloys

Reducing agent

All above

In the electronic structure of acetic acid,the total number of shared and unshaped pair of electrons are respectively.

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16 ,8

8 ,4

12 ,8

8 ,12

Which of the following is not known.

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KrF6

XeF6

XeO3

KrF2

The bonding of transition metal complex was not well understand until the pioneer work of.

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Ps JAISWAL

GS MANKU

BR thukral

Alfred Weriner

The atomic number of potassium is 19 and that of mangness is 25 Although the colour of MnO4 is dark violet yet the K+ is colourless this is due to the fact that.

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Mn is a transition element while K+ is not

[MnO4]- is negatively charged while K+ has positive charge

The effective atomic number of Mn is [MnO4]- is 26: while for K+ the atomic number is 18

The Mn is a high positive oxidation state allows charge transfer transitions.

Which of the following elements display maximum tnedency to form P Pi - p PI multiple bonds with itself and with carbon and oxygen.

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N

p

Bi

As

Nitric acid is used in manufacturing of.

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Explosive

H2SO4

Fertilizer

All above

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

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F-

O2-

Na+

Ca2+

The state of hybridization of Xe in Xe F6 are

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sp2

sp3

sp3 d

dsp3

The fluoride tooth paste contains

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SnF2 and Sn2P2O7

NaF

CaF2

None of these

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