Question # 1

Nitrogen is present in atmosphere by weight:

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75%

76%

77%

78%

Which has garlic like odour?

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N₂O

NO

NO₂

NH₄

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

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Sb

N

P

As

Calcium carbonates contains oxygen in it:

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48%

50%

53%

60%

Group VI-A elements are called:

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Halogens

Electron deficient

alkaline earth metal

Chalcogens

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

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N

P

Sb

Bi

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

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Sb

N

P

As

Tungsten and Uranium are turned to an reaction with HNO₃:

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Oxides

chlorides

Nitrides

Nitrates

Tungsten and uranium are turned to an reaction with HNO₃

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Oxides

Chlorides

Nitrides

Nitrates

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

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N

P

Sb

Bi

Colour of PCl₅is:

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Red

Yellowish White

Grey

Colourless

Which property is not present in non-metals:

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Predominantly covalent

Poor conductor

High E.N. Value

High electropositivity

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

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N

P

As

Sb

Which property is not present in non-methals

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Predominantly covalent

Poor conductor

Hig E.N. value

High electropositivity

Nitrogen is present in atmosphere

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21%

36%

78%

89%

Aqua Regia has ratio of conc. HCl and HNO₃

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1 : 2

1 : 3

1 : 4

2 : 3

Formation of NO from N₂ and O₂ requires temp

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30⁰C

300⁰C

3000⁰C

30000⁰C

Which can be prepared from HNO₃?

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T.N.T

Fertilizers

Picric acid

All of these

Which phosphorus is the most poisonous?

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White

Red

Black

All

Allotropic forms of sulpher are

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Two

Three

Four

Five

Which gas is heavier than air?

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CO₂

NH₃

Cl₂

CO₂

Ring testis given by ions.

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Nitrides

Nitrates

Cyanates

Nitriles

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

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N

P

As

Sb

All elements of group VI-A non-metal except

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Te

S

Se

Po

Nitrogen is present in atmosphere

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21%

36%

78%

89%

What are non-metals?

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Sb & Bi

P & Bi

N & P

As & N

Bone ash contains calcium phosphate

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70%

80%

90%

100%

Which is aqua regia?

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HCL : NO

HCl : HNO₃

HCl : H₂SO₄

H₂SO₄: HNO₃

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