Answer:
he main ingredient in most plastic material is a derivative from crude oil and natural gas. There are many different types of plastics – clear, cloudy, solid colour, flexible, rigid, soft, etc. Plastic products are often a polymer resin which is then then mixed with a blend of additives (See polymer vs. plastic).
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Plastics are made from natural materials such as cellulose, coal, natural gas, salt and crude oil through a polymerisation or polycondensation process. Plastics are derived from natural, organic materials such as cellulose, coal, natural gas, salt and, of course, crude oil.
Answer:
d. carboxyl
Explanation:
The presence of carbonyl group (>C=O)) and a hydroxyl group ( (−OH) on the same carbon atom is called a "carboxyl" group. A carboxyl group is represented as COOH and acts as the functional group part of carboxylic acids.
For example:
- Formic acid or Methanoic acid (H-COOH)
- Butanoic acid (C3H7-COOH)
Hence, the correct option is "d. carboxyl ".
Electron affinity is defined as the change in energy (in kJ/mole) of a neutral atom (in the gaseous phase) when an electron is added to the atom to form a negative ion. In other words, the neutral atom's likelihood of gaining an electron.
Answer:
The number of valence electrons in an atom is reflected by its position in the periodic table of the elements (see the periodic table in the Figure below). Across each row, or period, of the periodic table, the number of valence electrons in groups 1–2 and 13–18 increases by one from one element to the next
