Question # 1

Graphite is a good conductor of electricity because is.

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Has sp2 hybridized carbon stoms

Has free electrons

Is crystalline

Has free atoms

In the long form of periodic table, elements are arranged according to.

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Increasing atomic number

Decreasing atomic number

Increasing atomic mass

Decreasing atomic mass

At high temperature nitrogen combines with calcium carbide to give

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Calcium cyanide

Calcium cyanamide

Calcium nitride

Calcium cabonate

The order in O2+ is

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1.0

1.5

2.0

2.5

Type of hybrid orbitals used by the chlroine atom in CIO2 is.

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sp2

sp3

sp

None of these

The compound which does not act as Lewis acid is.

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BF3

AlCl3

BeCl2

SnCl4

The dipole moments of the given species are such that.

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BF3 > NF3 > NH3

NF3 > BF3 > NH3

NHE > NF3 >BF3

NH3 > BF3 > NF3

Consider the coordination compound Na2[Pt(CN)4] the Lewis and is

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[Pr(CN)4]2

Na+

Pt

Pt2+

The halide which is inert to water is

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PCl5

SiCl4

BCl3

SF3

The aluminium alloy used to make parts of aircrafts is.

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Magnalium

Aluminium bronze

Duralumin

All of the these

The inert gasses AR, Ka, and Xe form solid compounds with certain organic molecules under pressure..

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Halides

Hydrates

Clathrates

All of above

The forces which holds the atoms together in a molecule is called

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Ionic bond

Covalent bond

Co ordinate bond

Chemical bond

The movement of an electric charge produce a magnetic field is known from the

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Elementary Physics

Elementary Chemistry

Both A and B

None of above

Fluorine is.

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Powerful oxidizing agent

Most reactive element

Used as refrigerants

All of above

The formula of Borax is.

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Na2B4O7 6H2O

Na2B4O7 8H2O

Na2B4O7 10H2O

Na2B4O7 12H2O

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

Bases and reducing agents are electron giving agents and also called as.

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Electrodotic

Electrophile

Nucleophile

None of above

The state of hybridization of carbon in CO2 is

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sp2

sp

sp3

dsp2

Allotropic form of tin

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White tin

Grey tin

Rhomic tin

All above

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

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Mg

Na

Ca

Sr

Lithum silicide reacts with concentrated hydrochlric acid to give lithium chlride along with.

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H2 and SI

Si H 4 gas

Disilane gas

Si3H8

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