345053
In the prevention of air pollution, the role of scrubber is to remove
1 Particular \(\mathrm{SO}_{2}\)
2 Liquid \(\mathrm{SO}_{2}\)
3 Gaseous \(\mathrm{SO}_{2}\)
4 Liquid \(\mathrm{SO}_{3}\)
Explanation:
A scrubber can remove gases like sulphur dioxide. In a scrubber, the exhaust is passed through a spray of water or lime.
KCET - 2024
BIOXII16: ENVIRONMENTAL ISSUES
345054
Catalytic converters possesses which one of the following metals as catalyst?
1 Platinum
2 Rhodium
3 Palladium
4 All of them
Explanation:
Catalytic converters having expensive metals like platinum, palladium and rhodium as the catalysts, are fitted in automobiles for reducing the emission of poisonous gases like \(\mathrm{NO}\) and \(\mathrm{CO}\). As it converts carbon monoxide (CO) and nitric oxide (NO) to less harmful gases, i.e. carbon dioxide and nitrogen gas.
BIOXII16: ENVIRONMENTAL ISSUES
345055
Which of the following are the correct approaches to reduce air pollution caused by automobiles? i. Use of combustion technique ii. Use of catalytic converters in four-stroke engines iii. Use of diesel with high levels of sulphur iv. Use of unleaded petrol
1 i and ii
2 iii and iv
3 ii and iv
4 i and iii
Explanation:
Proper maintenance of automobiles along with use of lead-free petrol or diesel can reduce the pollutants they emit. Catalytic converters, having expensive metals namely platinumpalladium and rhodium as the catalysts, are fitted into automobiles for reducing emission of poisonous gases.
BIOXII16: ENVIRONMENTAL ISSUES
345056
The material generally used for sound proofing of rooms like a recording studio and auditorium is:
1 Cotton
2 Coir
3 Wood
4 Styrofoam
Explanation:
Styrofoam prevents reflection of sound waves and absorbs them hence used as sound proofing material.
345053
In the prevention of air pollution, the role of scrubber is to remove
1 Particular \(\mathrm{SO}_{2}\)
2 Liquid \(\mathrm{SO}_{2}\)
3 Gaseous \(\mathrm{SO}_{2}\)
4 Liquid \(\mathrm{SO}_{3}\)
Explanation:
A scrubber can remove gases like sulphur dioxide. In a scrubber, the exhaust is passed through a spray of water or lime.
KCET - 2024
BIOXII16: ENVIRONMENTAL ISSUES
345054
Catalytic converters possesses which one of the following metals as catalyst?
1 Platinum
2 Rhodium
3 Palladium
4 All of them
Explanation:
Catalytic converters having expensive metals like platinum, palladium and rhodium as the catalysts, are fitted in automobiles for reducing the emission of poisonous gases like \(\mathrm{NO}\) and \(\mathrm{CO}\). As it converts carbon monoxide (CO) and nitric oxide (NO) to less harmful gases, i.e. carbon dioxide and nitrogen gas.
BIOXII16: ENVIRONMENTAL ISSUES
345055
Which of the following are the correct approaches to reduce air pollution caused by automobiles? i. Use of combustion technique ii. Use of catalytic converters in four-stroke engines iii. Use of diesel with high levels of sulphur iv. Use of unleaded petrol
1 i and ii
2 iii and iv
3 ii and iv
4 i and iii
Explanation:
Proper maintenance of automobiles along with use of lead-free petrol or diesel can reduce the pollutants they emit. Catalytic converters, having expensive metals namely platinumpalladium and rhodium as the catalysts, are fitted into automobiles for reducing emission of poisonous gases.
BIOXII16: ENVIRONMENTAL ISSUES
345056
The material generally used for sound proofing of rooms like a recording studio and auditorium is:
1 Cotton
2 Coir
3 Wood
4 Styrofoam
Explanation:
Styrofoam prevents reflection of sound waves and absorbs them hence used as sound proofing material.
345053
In the prevention of air pollution, the role of scrubber is to remove
1 Particular \(\mathrm{SO}_{2}\)
2 Liquid \(\mathrm{SO}_{2}\)
3 Gaseous \(\mathrm{SO}_{2}\)
4 Liquid \(\mathrm{SO}_{3}\)
Explanation:
A scrubber can remove gases like sulphur dioxide. In a scrubber, the exhaust is passed through a spray of water or lime.
KCET - 2024
BIOXII16: ENVIRONMENTAL ISSUES
345054
Catalytic converters possesses which one of the following metals as catalyst?
1 Platinum
2 Rhodium
3 Palladium
4 All of them
Explanation:
Catalytic converters having expensive metals like platinum, palladium and rhodium as the catalysts, are fitted in automobiles for reducing the emission of poisonous gases like \(\mathrm{NO}\) and \(\mathrm{CO}\). As it converts carbon monoxide (CO) and nitric oxide (NO) to less harmful gases, i.e. carbon dioxide and nitrogen gas.
BIOXII16: ENVIRONMENTAL ISSUES
345055
Which of the following are the correct approaches to reduce air pollution caused by automobiles? i. Use of combustion technique ii. Use of catalytic converters in four-stroke engines iii. Use of diesel with high levels of sulphur iv. Use of unleaded petrol
1 i and ii
2 iii and iv
3 ii and iv
4 i and iii
Explanation:
Proper maintenance of automobiles along with use of lead-free petrol or diesel can reduce the pollutants they emit. Catalytic converters, having expensive metals namely platinumpalladium and rhodium as the catalysts, are fitted into automobiles for reducing emission of poisonous gases.
BIOXII16: ENVIRONMENTAL ISSUES
345056
The material generally used for sound proofing of rooms like a recording studio and auditorium is:
1 Cotton
2 Coir
3 Wood
4 Styrofoam
Explanation:
Styrofoam prevents reflection of sound waves and absorbs them hence used as sound proofing material.
345053
In the prevention of air pollution, the role of scrubber is to remove
1 Particular \(\mathrm{SO}_{2}\)
2 Liquid \(\mathrm{SO}_{2}\)
3 Gaseous \(\mathrm{SO}_{2}\)
4 Liquid \(\mathrm{SO}_{3}\)
Explanation:
A scrubber can remove gases like sulphur dioxide. In a scrubber, the exhaust is passed through a spray of water or lime.
KCET - 2024
BIOXII16: ENVIRONMENTAL ISSUES
345054
Catalytic converters possesses which one of the following metals as catalyst?
1 Platinum
2 Rhodium
3 Palladium
4 All of them
Explanation:
Catalytic converters having expensive metals like platinum, palladium and rhodium as the catalysts, are fitted in automobiles for reducing the emission of poisonous gases like \(\mathrm{NO}\) and \(\mathrm{CO}\). As it converts carbon monoxide (CO) and nitric oxide (NO) to less harmful gases, i.e. carbon dioxide and nitrogen gas.
BIOXII16: ENVIRONMENTAL ISSUES
345055
Which of the following are the correct approaches to reduce air pollution caused by automobiles? i. Use of combustion technique ii. Use of catalytic converters in four-stroke engines iii. Use of diesel with high levels of sulphur iv. Use of unleaded petrol
1 i and ii
2 iii and iv
3 ii and iv
4 i and iii
Explanation:
Proper maintenance of automobiles along with use of lead-free petrol or diesel can reduce the pollutants they emit. Catalytic converters, having expensive metals namely platinumpalladium and rhodium as the catalysts, are fitted into automobiles for reducing emission of poisonous gases.
BIOXII16: ENVIRONMENTAL ISSUES
345056
The material generally used for sound proofing of rooms like a recording studio and auditorium is:
1 Cotton
2 Coir
3 Wood
4 Styrofoam
Explanation:
Styrofoam prevents reflection of sound waves and absorbs them hence used as sound proofing material.
