Which of the following substances can be classified as heavy chemicals?
CaOCl\(_2\)
H\(_2\)SO\(_4\)
AgNO\(_3\)
CaO
Correct answer is B
- heavy chemicals are produced and handled in large lots and are often in a crude state.
- Some examples of bulk chemicals are ammonia, sulfuric acid, and sodium hydroxide
- Fine chemicals are single, pure and complex chemicals that are only produced in small amounts
ethane and ethene
ethene and ethane
ethyne and ethene
ethane and ethyne
Correct answer is B
No explanation has been provided for this answer.
which of the following organic compounds has the lowest boiling point?
C\(_6\)H\(_14\)
C\(_5\)H\(_12\)
C\(_4\)H\(_10\)
( CH\(_3\) )\(_3\)
Correct answer is D
- The boiling points of alkanes increase with increasing number of carbons. This is because the intermolecular attractive forces, although individually weak, become cumulatively more significant as the number of atoms and electrons in the molecule increases.
- However; branched alkanes normally exhibit lower boiling points than unbranched alkanes of the same carbon content. This occurs because of the greater van der Waals forces that exist between molecules of the unbranched alkanes
Biotechnology is applied in the?
treatment of sewage
treatment of water
purification of chemicals
purification of metals
Correct answer is A
There are several wastewater treatment methods based on biotechnology that are used worldwide. It includes Activated Sludge, Oxidation Ponds, Tricking Filters, Bio-filters and Anaerobic treatment. All the methods are part of the biological wastewater treatment and use microbes to treat organic waste in sewage.
In a mixture of gases which do not react chemically together, the pressure of the individual gas is?
atmospheric pressure
vapor pressure
total pressure
partial pressure
Correct answer is D
The pressure exerted by an individual gas in a mixture is known as its partial pressure