Explanation

• Ethylene bromide (C2H4Br2) is a compound that was formerly used as a scavenger in leaded gasoline to prevent the formation of lead oxide and lead sulfate deposits in engines. It reacted with the lead compounds to form a volatile lead bromide, which was then exhausted out of the engine.
• The use of leaded gasoline and ethylene bromide as a scavenger has largely been phased out due to environmental and health concerns.

Explanation

Maltose is not a macromolecule.

Explanation

• Successive ionization energies refer to the energy required to remove electrons one by one from an atom, resulting in the formation of a series of ions with increasing charge.
• This process involves the sequential removal of electrons from an atom, with each removal requiring a specific amount of energy, known as the ionization energy.
• The term "successive" refers to the fact that the electrons are removed one by one, in a specific order, with each removal building on the previous one.

Explanation

• Lemons contain citric acid, which is a naturally occurring compound that gives lemons their characteristic sour taste.
• Citric acid is a weak organic acid that is found in many fruits, including lemons, oranges, and grapefruits.
• It is responsible for the tartness and acidity of these fruits.

Explanation

Isotopes are atoms of the same element that have the same number of protons (atomic number) but a different number of neutrons. This means they have:

• Same chemical properties (because they have the same number of protons, which determines chemical behavior)
• Different mass numbers (because they have a different number of neutrons)
• Different physical properties (such as different atomic masses, different radioactivity, etc.)

Explanation

Ions have have noble gas electronic configuration' was suggested by Kossel.

Explanation

• Epoxy paints are commonly used to coat industrial equipment, including thermal power station components, due to their excellent adhesion, corrosion resistance, and durability. 
• Epoxy paints form a strong, chemical-resistant film that protects the underlying metal from corrosion and wear.

Explanation

• The removal of the 7th electron from an element of Group VI of the periodic table needs three times more energy than the removal of the 6th electron.
• This is because the ionization energy increases as you remove more electrons from an atom, and this is due to the fact that the electrons that are left behind are more strongly attracted to the positive nucleus.

Explanation

• Dry ice is the solid form of carbon dioxide (CO2), and it is an example of a molecular crystal.
• In a molecular crystal, the molecules are held together by weak intermolecular forces such as van der Waals forces or hydrogen bonds, rather than by strong chemical bonds.

Explanation