Question # 1

The reaction between Cu and conc. H2SO4 produces

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SO3

SO2

H2

Cu + ions

The oxidation of NO in air produces

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N₂O₃

NO₂

N₂O₃

N₂O₄

Which statement is incorrect about H2SO4

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Dehydration agent

dibasic acid

Oxidizing agent

Reducing agent

Bone ash contain calcium phosphate

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40%

50%

70%

80%

Which element does not have allotropic form

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Nitrogen

Phosphorous

Arsenic

Antimony

An element has oxidation state -2, +4, +6 in its compounds. In which group in the periodic table is this element likely to be.

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Grooup III A

Group IV A

Group V A

Group VI A

Out of the elements of group VA, the highest energy is possessed by

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N

P

Sb

Bi

PCl3 reacts with water to form

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PH3

POCl3

H3PO4

H3PO5

NO2 can be obtained by heating.

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NaNO3

KNO3

Pb(NO3)2

NH3NO3

Each of the following is true for white and red phosphorus except one.

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Both are soluble in CCl4

Both can be oxidized by heating in air

Both consists of same kind of atoms

Both can be converted into each other

Which catalyst is used in contact process.

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Fe2O3

V2O5

SO3

Ag2O

Which form of phosphorus is more stable.

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White

Red

Black

Both a and b

The most electronegative element of group V-A is

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N

P

Sb

Bi

Basicity of ortho phosphoric acid is.

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1

2

3

4

Role of H2S in the given chemical reaction is H2S + I2--------------- 2HI+S

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Oxidising agent

Reducing agent

Dehydrating agent

As an acid

In pyrite burner, the gas produced is.

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SO3

SO2

CO2

NO

Which of the following acids possess oxidizing and reducing properties.

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HCl

HNO2

HNO3

H2SO4

In group V-A elements the most electronegative elements is

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Sb

N

P

As

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