Free Periodic Properties and Trends MCQs with Answers
606 Periodic Properties and Trends MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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606 questions · page 28 of 31
541. The first ionization potential of alkaline earth metal is greater than alkali metals because _.
- A. They are more reactive
- B. They have greater atomic radii
- C. They have smaller atomic sizes
- D. All of the above
Explanation: In general, as we move from left to right in a period, the ionization energy of the elements increases due to successive increase in the…
Correct answer: They have smaller atomic sizes542. What is the general trend of melting and boiling points of transition elements along the period?
- A. Increases from left to right
- B. Decreases from left to right
- C. Increases up to the middle then decreases
- D. Decreases up to the middle and then increases
Explanation: The relationship between the melting and boiling points of transition elements within a period is directly influenced by the number of…
Correct answer: Increases up to the middle then decreases- A. 3A & 4A
- B. 5A & 6A
- C. 6A & 4A
- D. 3A and 6A
Explanation: The ionization energies of group IIIA and VIA show abnormal trends because elements of these groups tend to lose electrons easily to…
Correct answer: 3A and 6A- A. Neutral, excited
- B. Excited, de-excited
- C. De-excited, excited
- D. None of these options are correct
Explanation: When a light photon arrives at the metal surface, it is absorbed. This process promotes the electrons to a higher energy level.
Correct answer: Excited, de-excited- A. J/mol
- B. KJ/mol
- C. KJ/atom
- D. J/atom
Explanation: Electron affinity is defined as the change in energy "(KJ/mol)" of a neutral atom when an electron is added to the atom to form a negative…
Correct answer: KJ/mol- A. Removed,cation
- B. Added,cation
- C. Added, anion
- D. Removed, anion
Explanation: c) Added, anion: This is the correct option. Electron affinity is the energy released when an electron is added to an atom to form an…
Correct answer: Added, anion- A. F
- B. Cl
- C. I
- D. At
Explanation: Astatine is extremely rare and is considered one of the rarest naturally occurring elements on Earth.
Correct answer: At- A. Phosphorous
- B. Sulphur
- C. Oxygen
- D. Both A & C
Explanation: Sulphur is the correct answer as it has the largest number of allotropic forms, including rhombic, monoclinic, plastic, and…
Correct answer: Sulphur- A. Aluminium.
- B. Potasium.
- C. Sodium.
- D. Calcium.
Explanation: In aluminum or aluminum alloy casting, the bubbles of an inert gas like argon or nitrogen are passed through the molten metal to perform…
Correct answer: Aluminium.- A. Xenon
- B. Radon
- C. Argon
- D. Krypton
Explanation: Explanation:Xenon is used in bacterial lamps, also known as excimer lamps, which are used to disinfect air and surfaces in hospitals and…
Correct answer: Xenon- A. Electron affinity
- B. Lattice energy
- C. Ionization energy
- D. Crystal energy
Explanation: A is incorrect as electron affinity is the amount of energy released when an electron attaches to a neutral atom or molecule in the…
Correct answer: Ionization energy- A. A gradual increase
- B. A gradual decrease
- C. First decrease then increase
- D. First increase then decrease
Explanation: A is correct because as we move further along a group, mass of the atoms increases due to increased no.
Correct answer: A gradual increase- A. HF
- B. HI
- C. HCl
- D. HBr
Explanation: A is incorrect as HF is not a strong acid.B is correct as Iodine and hydrogen have the lowest bond energy,hence less energy would be…
Correct answer: HI- A. Ne < N < C < B
- B. B < N < C < Ne
- C. B < C < N < Ne
- D. Ne < B < C < N
Explanation: As they move along the period towards the right the ionization energy increases. It is a fact and should be memorised.
Correct answer: B < C < N < Ne- A. Electron Affinity
- B. Non-metallic character
- C. Atomic Radius
- D. Melting point upto group IV
Explanation: The atomic radius decreases as we move along the period from left to right.
Correct answer: Atomic Radius- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Silicon has a giant covalent structure and a lot of heat is required to break the strong covalent bonds hence it has the highest melting…
Correct answer: Option C- A. Nitrogen requires a catalyst
- B. Oxygen is very inactive
- C. Oxygen is found in less concentration
- D. Nitrogen is highly inactive gas
Explanation: Option A is a true statement, but it does not, by itself, explain why nitrogen does not react under normal conditions; Nitrogen is highly…
Correct answer: Nitrogen is highly inactive gas- A. Atomic number
- B. Number of electrons
- C. Number of isotopes & their abundance
- D. None of the above
Explanation: Atomic mass depends on the number of isotopes and their abundance because:Isotopes of an element have the same atomic number but different…
Correct answer: Number of isotopes & their abundance- A. Of normal binary hydride
- B. Of an interstilial hydride
- C. of covalent hydride
- D. That does not exist
Explanation: HYDRIDES Hydrogen compounds with metals and non-metals are known as hydrides.
Correct answer: Of an interstilial hydride- A. Aluminium can be recycled
- B. Aluminium is light
- C. Aluminium is cheaper
- D. Aluminium is resistant to corrosion
Explanation: It is because aluminium is resistant to corrosion by organic acids.
Correct answer: Aluminium is resistant to corrosion