Question # 1

Lithium shows diagonal relationship with

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Beryllium

Sodium

Magnesium

Calcium

H-Bonding also ox in ling system like

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Protein

DNA

Botha A and B

None of above

Ferrochrum contains Cr up to

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60-70%

70-80%

80-90%

40-50%

A chemical reaction resulting in a change in the electric charge on the reacting particles may be called as.

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Add ion reaction

Redox reaction

Elimination reaction

Chain reaction

Anything that influence the valence electrons will affect the chemistry of the element Which of the following factors does not affect the valency shell.

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Valence principle quantum number in

Nuclear charge (Z)

Nuclear mass

Number of core electrons

Ionization potential of carbon is.

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11.2

7.8

8.1

7.3

Copper is mainly extracted from witch of the following ore

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Sulphide ores

Carbonate ores

Oxides ores

Non sulphide ores

Which of the following state is not true with respect to copper.

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it is malleable and ductile

It is a best conductor of heat and electricity

It forms alloys easily

Moltan copper absorbed carbon dioxide

Which of the following is the most stable towards heat.

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CaCO3

BaCO3

Na2CO3

MgCO3

Which of the following represent the fuming sulphuric acid

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H2S2O4

H2S2O3

H2S2O6

H2S2O7

According to CFT the metal ligand bond is considered to be ionic to presentage.

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100%

90%

50%

70%

The most convenient and has nearest approach to a universal pH measurement

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pH strips

pH indicator

The emf method

The colorimetric

The correct order of ionic radii for the following ions is.

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S²- < P^3- < Cl- < K+

Cl- > S2+ > P3- > k+

K+ > Cr > S2+ > P3-

P3+ > S2 > Cl - > K+

Which metal burns in air at high temperature with the evolution of much heat.

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Cu

Hg

Pb

Al

Group VII A of periodic table consist of elements.

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4

5

6

7

Select the correct IUPAC nae for [Co(NH3)6 ]2+

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Hexammoniacobaltate (II) ion

Hexaamminecobaltate (II) ion

Hexammoniacobalt (II) ion

Hexaamminecobalt (II) ion

Pick out the incorrect statement for CIF3

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It has trigonal planar geometry

It is used to make gaseous UF6 which is useful in making enriched U-235 fuel

It is used as powerful fluorinating agent for inorganic compounds

CIF2 has been used as fuel in short range rockets reating with hydrazine.

The strongest acid is.

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HNO2

HNO3

H2N2O2

HNOS

In which pair of species, the Lewis formulae contain same number of ion pairs and bond pairs but they are not isoelectronic.

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O2, N2

SO2, O3

PCl3 , BF3

SOCl2, COCl3

The bond length is measured by

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X-ray diffraction

Neutron diffraction

Microwave spectroscopy

All of above

Main constituent of all inorganic matter

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Carbon

Silicon

Tin

Lead

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