Question # 1

The pH Value 4.2 is of

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Vinegar

Lemons

Oranges

Tomatoes

Is a chain silicate

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Olivine

Tremolite

Beryl

Zeolite

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

A molecule MX4 has a square planar shape, The number of non bonding pairs of electrons around M is .

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2

1

0

3

Al Cl3 is used in

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Manufacturing of petrol

In borax bead test

Prezervation of food

All above

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

The solution of the transition metal complexes having one or more unpaired electrons in the d-orbital are.

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Coloured

Colourless

White

None of above

Give violet colour to flame

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Gallium

indium

Thallium

Aluminium

Is a peroxy acid

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H2SO5

H2S2O6

H2SO4

H2S2O7

Which of the following bonds between carbon -carbon is teh strongest.

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Sigma bond

Pi bond

Double bond

Triple bond

Aluminum occurs in nature as.

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Native

Combined form

Both native and combined

Free

Helium oxygen mixture is used by deep sea divers in preference to nitrogen oxygen mixture, because.

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Helium is much less soluble in blood than nitrogen

Nitrogen is much less soluble in blood than helium

Due to high pressure deep under the sea, nitrogen and oxygen react to give poisonous nitric oxide.

Nitrogen is highly soluble in wateer

Setting of cement is improved by

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Lime stone

Clay

Gypsum

Water

Oxides ores of Aluminium

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Corundum

Bauxite

Diaspore

All above

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

Helium contents in the atmosphere by volume.

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0.0005%

0.0015%

0.0001%

0.00001%

Acid rain effects

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Human being

Crops

Aquatic life

All above

In bi sulphate ion, the formal charge on sulphru atom is.

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+1

+2

+4

+6

Which of the following elements of group 15 is a typical metal.

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P

As

Bi

Sb

Inter halogens are of types.

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3

4

5

6

Fluorine is.

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Powerful oxidizing agent

Most reactive element

Used as refrigerants

All of above

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