Question # 1

Which property is not present in non-metals:

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Predominantly covalent

Poor conductor

High E.N. Value

High electropositivity

Calcium carbonate contains oxygen in it

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48%

50%

53%

60%

Nitrogen is present in atmosphere

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21%

36%

78%

89%

Colour of N₂O₄ is

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Raddish brown

Yellow

Colouries

green

Reaction of HNO, with very dilute Zinc and at low temperature gives

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H₂

NO

NO₂

NH₄

The most stable phosphorus allotrope is

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White

Red

Black

All

Sulphuric acid is used

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As fertilizers

As dehydrating agent

As oxidizing agent

All above

Colour of PCl₅is:

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Red

Yellowish White

Grey

Colourless

Which is aqua regia?

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HCL : NO

HCl : HNO₃

HCl : H₂SO₄

H₂SO₄: HNO₃

Allotropic forms of sulpher are

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Two

Three

Four

Five

SO₂is not absorbed in water directly to or H₂SO₄because:

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The reaction does not go to completion

the reaction is quite slow

the reaction is exothemic

SO₃is insolublein water

Group VI-A elements are called:

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Halogens

Electron deficient

alkaline earth metal

Chalcogens

NO₂forms acidic solution:

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Red

Blue

Green

Brown

Out of all the elements of group V-A , the highest ionization energy is possessed by:

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N

P

Sb

Bi

Posphorus belongs to a group

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III-A

IV-A

V-A

VI-A

Allotropic forms of phosphorus are

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three

four

five

six

What are non-metals?

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Sb & Bi

P & Bi

N & P

As & N

Tungsten and Uranium are turned to an reaction with HNO₃:

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Oxides

chlorides

Nitrides

Nitrates

Which of the following species has the maximum number of unpaired electrons?

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O₂

O₂⁺

O₂^-

O₂^-2

Bone ash contains calcium phosphate

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70%

80%

90%

100%

Which has sweetish taste?

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N₂O

NH₃

Cl₂

CO₂

Among group V-A elements, the most electronegative element is:

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Sb

N

P

As

Aqua Regia has ratio of conc. HCl and HNO₃

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1 : 2

1 : 3

1 : 4

2 : 3

Calcium carbonates contains oxygen in it:

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48%

50%

53%

60%

Which is an inert gas?

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Nitrogen

Oxygen

Hydrogen

CO

Ring testis given by ions.

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Nitrides

Nitrates

Cyanates

Nitriles

All elements of group VI-A non-metal except

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Te

S

Se

Po

Which can be prepared from HNO₃?

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T.N.T

Fertilizers

Picric acid

All of these

Which catalyst is used in contact process?

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Fe₂O₃

V₂O₅

SO₃

Ag₂O

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