Question # 1

Hydrogen gas will not redue

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Heated cupric oxide

Headed ferric oxide

Heated stannic oxide

Heated aluminium oxide

Zeigler Natta catalyst is.

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Pt/PtO

TiCl4/Al(C2H5)3

Pt/Rh

Pt

Ferrochrum contains Cr up to

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60-70%

70-80%

80-90%

40-50%

Non localised bonds are referred as

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Metallic bond

Long range bonds

Ionic bond

Covalent bonds

The geometry of the molecule is primarily decided by

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Bond pairs around the central atom

No of k bond around the central atom

No of bond pairs as well as lone pairs around the central atom

No. of lone pairs on central atom

Among oxides of nitrogen all are gases except.

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N2O5

N2O

NO

N2O3

Which one of the following statements regarding BF3 is not correct.

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It is an ionic compound

It is an electron deficient compound

It is a Lewis acid

It forms adducts

Which of the following has the highest melting point.

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NaCl

KCl

MgO

BaO

Among all halogens no oxyacid of the following is known

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F

Cl

Br

I

Pick out incorrect statement regarding HF

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It is used for making chlorofluorocarbon used as refrigerating fluids and as propellants in aerosols

It is used in making ASIF3 and synthetic cryolite

Aqueous HF is used for etchine glass

HF does not react with B2O3 even in presence of conc. H2SO4

Ca H2 on reaction with water liberates

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H2

O2

Botha of these

None of these

In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is.

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8

16

12

20

The pH of milk is

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6.0

6.5

7.0

7.5

Metallic magnesium is obtained by

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Reduction of MgO with Coke

Electrolysis of an aqueous solution of MgCl2

Electrolysis of molten MgCl2

Displacement of magnesium by iron form MgCl2 solution.

NH3 has a not dipole moment while BF3 has zero dipole moment Thsi is because.

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NH3 is not a planar molecule while BF3 is a planar molecule.

NH3 is a planar molecule, while BF3 is a planner molecule.

Fluorine is more electronetative than nitrogen

Born is more electronegative than nitrogen

Which of the following statements in incorrect.

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Sodium hydride is ionic

Beryllium chloride is covalent

CCl4 gives a white ppt with AgNO3 solutions.

Bonds in NaCl are non directional

Four elements A, B,C,D have atomic numbers Z , 1 ,Z, Z +1 and Z +2 Respectively If Z is 9, then bond between which pair of elements will be ionic.

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A and C

D and C

D and B

B and C

Finely divided iorn combines with CO to give

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Fe(CO)3

Fe2 (CO)9

F33(CO)12

Fe(CO)6

Electronegativity of oxygen is.

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2,5

3,5

2,4

2.1

Which of the following statement is not true regarding Open Hearth process.

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No iron is lost

The process is economical and simple

Steel obtained is of high quality

Scrap iron cannot be used in this process.

Which of the following is an example of super octet molecules.

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C1F3

IF7

PCl5

All the three

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