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CHXI14:ENVIRONMENTAL CHEMISTRY

318399 The false statement among the followings:

1 The average residence time of

NO

is one month.

2 Limestone acts as a sink for

{SO}_{x}

.

3

{SO}_{x}

can be removed from flue gases by passing through a solution of citrate ions.

4 Ammonia acts as a sink for

{NO}_{x}

.

CHXI14:ENVIRONMENTAL CHEMISTRY

318400 Melting of "ice caps" may be due to

1 Depletion of ozone layer

2 Global warming

3 Acid rain

4 All the above

CHXI14:ENVIRONMENTAL CHEMISTRY

318401 Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because ____.

1 the reaction is endothermic and requires very high temperature.

2 the reaction can be initiated only in presence of a catalyst.

3 oxides of nitrogen are unstable.

4

N_{2}

and

O_{2}

are unreactive.

NCERT Exemplar

CHXI14:ENVIRONMENTAL CHEMISTRY

318402 Among the following, the incorrect statement is

1 Troposphere maintains heat balance

2 Sound waves cannot propagate in mesosphere

3 Ozone layer is present in troposphere

4 Gases are ionised in the thermosphere.

CHXI14:ENVIRONMENTAL CHEMISTRY

318403 Roasting of sulphides gives the gas $X$ as a by product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as it results in acid rain. Its aqueous solution is acidic and acts as a reducing agent, and its acid has never been isolated. The gas $X$ is

1

{SO}_{2}

2

{CO}_{2}

3

{SO}_{3}

4

H_{2} S

Explanation:

${SO}_{2}$ gas is obtained when any sulphide are is roasted.
$2 M_{2} S + 3 O_{2} ⟶ 2 M_{2} O + 2 {SO}_{2}$
This gas $({SO}_{2})$ exhibits all the characteristics as given in the question.

CHXI14:ENVIRONMENTAL CHEMISTRY

318399 The false statement among the followings:

1 The average residence time of

NO

is one month.

2 Limestone acts as a sink for

{SO}_{x}

.

3

{SO}_{x}

can be removed from flue gases by passing through a solution of citrate ions.

4 Ammonia acts as a sink for

{NO}_{x}

.

CHXI14:ENVIRONMENTAL CHEMISTRY

318400 Melting of "ice caps" may be due to

1 Depletion of ozone layer

2 Global warming

3 Acid rain

4 All the above

CHXI14:ENVIRONMENTAL CHEMISTRY

318401 Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because ____.

1 the reaction is endothermic and requires very high temperature.

2 the reaction can be initiated only in presence of a catalyst.

3 oxides of nitrogen are unstable.

4

N_{2}

and

O_{2}

are unreactive.

NCERT Exemplar

CHXI14:ENVIRONMENTAL CHEMISTRY

318402 Among the following, the incorrect statement is

1 Troposphere maintains heat balance

2 Sound waves cannot propagate in mesosphere

3 Ozone layer is present in troposphere

4 Gases are ionised in the thermosphere.

CHXI14:ENVIRONMENTAL CHEMISTRY

318403 Roasting of sulphides gives the gas $X$ as a by product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as it results in acid rain. Its aqueous solution is acidic and acts as a reducing agent, and its acid has never been isolated. The gas $X$ is

1

{SO}_{2}

2

{CO}_{2}

3

{SO}_{3}

4

H_{2} S

Explanation:

${SO}_{2}$ gas is obtained when any sulphide are is roasted.
$2 M_{2} S + 3 O_{2} ⟶ 2 M_{2} O + 2 {SO}_{2}$
This gas $({SO}_{2})$ exhibits all the characteristics as given in the question.

CHXI14:ENVIRONMENTAL CHEMISTRY

318399 The false statement among the followings:

1 The average residence time of

NO

is one month.

2 Limestone acts as a sink for

{SO}_{x}

.

3

{SO}_{x}

can be removed from flue gases by passing through a solution of citrate ions.

4 Ammonia acts as a sink for

{NO}_{x}

.

CHXI14:ENVIRONMENTAL CHEMISTRY

318400 Melting of "ice caps" may be due to

1 Depletion of ozone layer

2 Global warming

3 Acid rain

4 All the above

CHXI14:ENVIRONMENTAL CHEMISTRY

318401 Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because ____.

1 the reaction is endothermic and requires very high temperature.

2 the reaction can be initiated only in presence of a catalyst.

3 oxides of nitrogen are unstable.

4

N_{2}

and

O_{2}

are unreactive.

NCERT Exemplar

CHXI14:ENVIRONMENTAL CHEMISTRY

318402 Among the following, the incorrect statement is

1 Troposphere maintains heat balance

2 Sound waves cannot propagate in mesosphere

3 Ozone layer is present in troposphere

4 Gases are ionised in the thermosphere.

CHXI14:ENVIRONMENTAL CHEMISTRY

318403 Roasting of sulphides gives the gas $X$ as a by product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as it results in acid rain. Its aqueous solution is acidic and acts as a reducing agent, and its acid has never been isolated. The gas $X$ is

1

{SO}_{2}

2

{CO}_{2}

3

{SO}_{3}

4

H_{2} S

Explanation:

${SO}_{2}$ gas is obtained when any sulphide are is roasted.
$2 M_{2} S + 3 O_{2} ⟶ 2 M_{2} O + 2 {SO}_{2}$
This gas $({SO}_{2})$ exhibits all the characteristics as given in the question.

CHXI14:ENVIRONMENTAL CHEMISTRY

318399 The false statement among the followings:

1 The average residence time of

NO

is one month.

2 Limestone acts as a sink for

{SO}_{x}

.

3

{SO}_{x}

can be removed from flue gases by passing through a solution of citrate ions.

4 Ammonia acts as a sink for

{NO}_{x}

.

CHXI14:ENVIRONMENTAL CHEMISTRY

318400 Melting of "ice caps" may be due to

1 Depletion of ozone layer

2 Global warming

3 Acid rain

4 All the above

CHXI14:ENVIRONMENTAL CHEMISTRY

318401 Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because ____.

1 the reaction is endothermic and requires very high temperature.

2 the reaction can be initiated only in presence of a catalyst.

3 oxides of nitrogen are unstable.

4

N_{2}

and

O_{2}

are unreactive.

NCERT Exemplar

CHXI14:ENVIRONMENTAL CHEMISTRY

318402 Among the following, the incorrect statement is

1 Troposphere maintains heat balance

2 Sound waves cannot propagate in mesosphere

3 Ozone layer is present in troposphere

4 Gases are ionised in the thermosphere.

CHXI14:ENVIRONMENTAL CHEMISTRY

318403 Roasting of sulphides gives the gas $X$ as a by product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as it results in acid rain. Its aqueous solution is acidic and acts as a reducing agent, and its acid has never been isolated. The gas $X$ is

1

{SO}_{2}

2

{CO}_{2}

3

{SO}_{3}

4

H_{2} S

Explanation:

${SO}_{2}$ gas is obtained when any sulphide are is roasted.
$2 M_{2} S + 3 O_{2} ⟶ 2 M_{2} O + 2 {SO}_{2}$
This gas $({SO}_{2})$ exhibits all the characteristics as given in the question.

CHXI14:ENVIRONMENTAL CHEMISTRY

318399 The false statement among the followings:

1 The average residence time of

NO

is one month.

2 Limestone acts as a sink for

{SO}_{x}

.

3

{SO}_{x}

can be removed from flue gases by passing through a solution of citrate ions.

4 Ammonia acts as a sink for

{NO}_{x}

.

CHXI14:ENVIRONMENTAL CHEMISTRY

318400 Melting of "ice caps" may be due to

1 Depletion of ozone layer

2 Global warming

3 Acid rain

4 All the above

CHXI14:ENVIRONMENTAL CHEMISTRY

318401 Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because ____.

1 the reaction is endothermic and requires very high temperature.

2 the reaction can be initiated only in presence of a catalyst.

3 oxides of nitrogen are unstable.

4

N_{2}

and

O_{2}

are unreactive.

NCERT Exemplar

CHXI14:ENVIRONMENTAL CHEMISTRY

318402 Among the following, the incorrect statement is

1 Troposphere maintains heat balance

2 Sound waves cannot propagate in mesosphere

3 Ozone layer is present in troposphere

4 Gases are ionised in the thermosphere.

CHXI14:ENVIRONMENTAL CHEMISTRY

318403 Roasting of sulphides gives the gas $X$ as a by product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as it results in acid rain. Its aqueous solution is acidic and acts as a reducing agent, and its acid has never been isolated. The gas $X$ is

1

{SO}_{2}

2

{CO}_{2}

3

{SO}_{3}

4

H_{2} S

Explanation:

${SO}_{2}$ gas is obtained when any sulphide are is roasted.
$2 M_{2} S + 3 O_{2} ⟶ 2 M_{2} O + 2 {SO}_{2}$
This gas $({SO}_{2})$ exhibits all the characteristics as given in the question.