Chemical Reactions and Properties

Dr. Hannah Asil discusses various chemistry topics, including isotopes, mass spectrum analysis, ionization energy, electronic configurations, chemical reactions, and calculations. The video covers alkanes, alkenes, and their reactions, as well as mechanisms of reactions and periodic table trends. It concludes with polymer chemistry and various chemical calculations.

Which of the following statements best describes isotopes?

• Atoms with the same number of neutrons but different protons

• Atoms with the same number of protons but different neutrons

• Atoms with the same number of electrons but different protons

• Atoms with different numbers of protons and neutrons

How many molecular ion peaks are possible in the mass spectrum of ICl3?

• Five

• Four

• Three

• Two

What is the second ionization energy of magnesium?

• Mg2+ -> Mg3+ + e-

• Mg -> Mg2+ + 2e-

• Mg -> Mg+ + e-

• Mg+ -> Mg2+ + e-

Which ion has the largest radius among isoelectronic ions?

• O2-

• Mg2+

• Na+

• F-

Which compound has the most polar bonds?

• PH3

• NH3

• H2S

• H2O

What is the systematic name for a compound with the longest chain of six carbons and methyl groups on the fourth and fifth carbons?

• 3,4-dimethylhexane

• 3,4-dimethylhex-1-ene

• 4,5-dimethylhexane

• 4,5-dimethylhex-1-ene

Why does incomplete combustion occur?

• High temperature

• Low pressure

• Limited supply of oxygen

• Excess supply of oxygen

What is the purpose of adding cycloalkanes to petrol?

• To reduce viscosity

• For more efficient combustion

• To improve color

• To increase the boiling point

What type of reaction mechanism involves the addition of iodine monochloride to an alkene?

• Electrophilic addition

• Elimination

• Nucleophilic substitution

• Free radical substitution

How many double bonds are present if 0.01 mol of an alkene reacts with 0.03 mol of hydrogen?

• One

• Two

• Three

• Four