Question # 1

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

Which is an inert gas?

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Nitrogen

Oxygen

Hydrogen

CO

Which has garlic like odour?

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N₂O

NO

NO₂

NH₄

Colour of PCl₅is:

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Red

Yellowish White

Grey

Colourless

Tungsten and Uranium are turned to an reaction with HNO₃:

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Oxides

chlorides

Nitrides

Nitrates

Which is aqua regia?

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HCL : NO

HCl : HNO₃

HCl : H₂SO₄

H₂SO₄: HNO₃

NO₂ forms acidic solution

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Red

Blue

Green

Brown

Which are metalloid?

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Nitrogen and phosphorous

Arsenic and phosphorous antimony

Phosphorous and arsenic

Antimony and bismuth

Sulphuric acid is used

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As fertilizers

As dehydrating agent

As oxidizing agent

All above

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

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Te

Se

S

Pb

Which gas is heavier than air?

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CO₂

NH₃

Cl₂

CO₂

Oxidation of NO in air produces

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N₂O

N₂O₃

N₂O₄

N₂O₅

NO₂forms acidic solution:

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Red

Blue

Green

Brown

Nitrogen is present in atmosphere by weight:

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75%

76%

77%

78%

Which catalyst is used in contact process?

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Fe₂O₃

V₂O₅

SO₃

Ag₂O

What are non-metals?

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Sb & Bi

P & Bi

N & P

As & N

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

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N

P

Sb

Bi

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

Bone ash contains calcium phosphate

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70%

80%

90%

100%

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

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Sb

N

P

As

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

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H₂

NO

NO₂

NH₄

Which has sweetish taste?

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N₂O

NH₃

Cl₂

CO₂

Which property is not present in non-metals:

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Predominantly covalent

Poor conductor

High E.N. Value

High electropositivity

The brown gas formed when metal reduces HNO₃is

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N₂O₅

N₂O₃

NO₂

NO

Nitrogen is present in atmosphere

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21%

36%

78%

89%

Formation of NO from N₂ and O₂ requires temp

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30⁰C

300⁰C

3000⁰C

30000⁰C

Ring testis given by ions.

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Nitrides

Nitrates

Cyanates

Nitriles

Allotropic forms of sulpher are

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Two

Three

Four

Five

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ECAT Chemistry Chapter 15 Group IV-A and VI-A Elements Online Test MCQs With Answers

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