Question # 1

Tungsten and Uranium are turned to an reaction with HNO₃:

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Oxides

chlorides

Nitrides

Nitrates

The brown gas formed when metal reduces HNO₃is

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N₂O₅

N₂O₃

NO₂

NO

Group VI-A elements are called:

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Halogens

Electron deficient

alkaline earth metal

Chalcogens

Allotropic forms of sulpher are

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Two

Three

Four

Five

Out of all the elements of group V1-A the highest melting and boiling points is shown by the element

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Te

Se

S

Pb

Which element of group IV-A does not use d-orbital?

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N

P

As

Sb

Which is nitrous acid?

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HNO₃

HNO

HNO₂

H₂NO₃

Posphorus belongs to a group

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III-A

IV-A

V-A

VI-A

Calcium carbonates contains oxygen in it:

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48%

50%

53%

60%

Aqua Regia has ration of conc. HCl and HNO₃.

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1 : 2

1 : 3

1 : 4

2 : 3

Which is aqua regia?

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HCL : NO

HCl : HNO₃

HCl : H₂SO₄

H₂SO₄: HNO₃

Which phosphorus is the most poisonous?

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White

Red

Black

All

Calcium carbonate contains oxygen in it

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48%

50%

53%

60%

What are non-metals?

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Sb & Bi

P & Bi

N & P

As & N

Nitrogen is present in atmosphere

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21%

36%

78%

89%

Nitrogen is present in atmosphere

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21%

36%

78%

89%

Which has garlic like odour?

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N₂O

NO

NO₂

NH₄

Which are metalloid?

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Nitrogen and phosphorous

Arsenic and phosphorous antimony

Phosphorous and arsenic

Antimony and bismuth

The most stable phosphorus allotrope is

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White

Red

Black

All

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

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N

P

Sb

Bi

Which can be prepared from HNO₃?

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T.N.T

Fertilizers

Picric acid

All of these

Which is the most reactive?

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White phosphorus

Red Phosphorus

Graphite

Plastic sulphur

Which catalyst is used in contact process?

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Fe₂O₃

V₂O₅

SO₃

Ag₂O

SO₃ is not absorbed in water directly to or H₂SO₄ because

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the reaction does not go to completion.

the reaction is quite slow.

the reaction is exothermic.

SO₃ is insoluble in water.

Which is laughing gas?

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NO

N₂O

NO₂

NO₃

Which has sweetish taste?

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N₂O

NH₃

Cl₂

CO₂

NO₂forms acidic solution:

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Red

Blue

Green

Brown

Aqua Regia has ratio of conc. HCl and HNO₃

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1 : 2

1 : 3

1 : 4

2 : 3

Sulphuric acid is used

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As fertilizers

As dehydrating agent

As oxidizing agent

All above

Structure of P₄ is

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Trigonal

Tetragonal

Hexagonal

Monoclinic

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