Question # 1

The polarity of bonds can lead to polarity of molecules and affect

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Melting point

Boiling point

Solubility

All of above

Pick out the ideal conditions needed for the manufacture of H2SO4 by contact process.

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Low temperature high pressure and high concentration of reactants

Low temperature , low concentration of reactants and low pressure

High temperature high pressure and high concentration of reactants

Low temperature, low pressure and high concentration of reactants.

The ion that is isoelectornic with CO is

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CN-

O2+

CO2-

N2+

Zeigler Natta catalyst is.

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Pt/PtO

TiCl4/Al(C2H5)3

Pt/Rh

Pt

The number used in cancer therapy is.

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Fe

Co

Ni

Rn

Pig iron is also called.

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Cast iron

Steel

Wrought iron

Stainless steel

The concept is also known as proton donor acceptor system.

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Bronsted Lowery

Lewis

Lux Flood

Usanovich

In Dannis's method the end of the copper caps into which graphite electrode are fixed with cement.

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Portiant

Bakelite

Asbestos

All of above

Bryllium salts on hydrolysis give.

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Basic solutions

Acidic solutions

Neutral solutions

Amphoteric solutions.

The alkali metal with highest melting point is

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K

Na

Li

Ca

Which of the following is not known.

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KrF6

XeF6

XeO3

KrF2

Dry ice is

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Solid CO

Solid CO2

Solid NH3

Solid SO2

The hybridization of S in SO2 is.

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sp

sp2

sp3

dsp2

Elements of group 14

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Exhibit oxidation state of -4

Exhibit oxidation state of +4

From M3+ and M4+ ions

Form M4- and M4+ iona

Which is the second most abundant element occurring the earth crust.

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Iron

Cu

Cr

Ni

Which compound among the following does not contain an ionic bond.

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NaOH

HCl

KaS

LiH

The Lewis formula of SOCl2, the total number of bond pairs and lone pairs of electron around sulphur are.

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2 ,1

2,2

3,1

3,0

Which of the following is an allotrops of hydrogen.

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0- H2

P-H2

Both A and B

None of these

Formula of orthophosphoric acid

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H2PO4

H3PO2

H2P2O5

Pick out the incorrect statement.

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Red phosphorus consists of a complied chain structure and black phosphorus has a layer structure.

Nitrogen shows a little tendency for catenation, because N-N a single bond is very strong.

The xamimum number of covalent bonds formed by nitrogen is four, since it has no d-orbitals in its valence shell

The group 15 elements do not form M5+ ions, but +5 oxidatin state is realized only through covalent bonding.

Which of the following elements is most electropositive.

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C

N

O

Be

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