One of the main causes of air pollution in cities is emissions from vehicles like cars and trucks. Cars emit various pollutants which are bad for human health when inhaled, like
1. Nitrogen oxides (NOₓ)
2. Carbon monoxide (CO)
3. Carbon dioxide (CO₂)
4. Benzene
Which of the above pollutants are not tolerated by human beings even at very low levels?
1 and 4 only
1 and 2 only
1, 2 and 3 only
1, 2 and 4 only
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy