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 18 of 31
- A. Basic medium.
- B. Bleaching agent.
- C. Neutral medium.
- D. Both in acidic and basic medium.
Explanation: The reaction Ag2O + H2O2 → 2Ag + H2O + O2 is facilitated in a basic medium.
Correct answer: Basic medium.- A. Atomic volume
- B. Metallic character
- C. Ionization energy
- D. All of the above
Explanation: The correct answer is 'All of the above' because each property listed-atomic volume, metallic character, and ionization energy-is a…
Correct answer: All of the above- A. Lothar Meyer
- B. D.I. Mendeleev
- C. J.A.R. Newlands
- D. J.W. Dobereiner
Explanation: The correct answer is J.A.R. Newlands. He proposed the Law of Octaves in 1864, observing that every eighth element shared similar…
Correct answer: J.A.R. Newlands- A. Lothar Meyer
- B. A.E. de Chancourtois
- C. Newlands
- D. Dobereiner
Explanation: The correct answer is Dobereiner. Johann Wolfgang Döbereiner proposed the concept of 'triads' in which groups of three elements have…
Correct answer: Dobereiner- A. Numbers of neutrons
- B. Atomic number
- C. Atomic weight
- D. Atomic volume.
Explanation: Mendeleev's periodic table organized elements based on increasing atomic weight, as the concept of atomic number was not yet established.
Correct answer: Atomic weight- A. Dobereiner
- B. Newlands
- C. Lothar Meyer
- D. Chancourtois
Explanation: The correct answer is Dobereiner, who proposed the Law of Triads in the early 19th century.
Correct answer: Dobereiner- A. Atomic volume with increase in atomic number
- B. Atomic volume with increase in atomic weight
- C. Atomic radii with increase in atomic weight
- D. Atomic weight with increase in atomic number.
Explanation: Lothar Meyer was one of the pioneers in recognizing the periodicity of elemental properties.
Correct answer: Atomic volume with increase in atomic weight- A. Metallic character
- B. Density
- C. Atomic size
- D. Valence electrons
Explanation: The correct answer is Option D: Valence electrons. As you descend a group in the periodic table, elements have the same number of valence…
Correct answer: Valence electrons- A. 1 (Alkali metals)
- B. 2 (Alkaline earth metals)
- C. 14 (Carbon group)
- D. 18 (Noble gases)
Explanation: The correct answer is Group 18, which consists of noble gases like helium, neon, and argon.
Correct answer: 18 (Noble gases)- A. NaCl
- B. LiCl
- C. KCl
- D. RbCl
Explanation: NaCl has the highest melting point among the given compounds. This is due to the strong electrostatic attractions between the smaller…
Correct answer: NaCl- A. 8
- B. 18
- C. 20
- D. 32
Explanation: Magic numbers are specific numbers of protons or neutrons in a nucleus, which result in more stable configurations.
Correct answer: 20- A. 32
- B. 18
- C. 8
- D. 36
Explanation: The periodic table is structured into periods and groups. Long periods refer to periods 4 and 5, each of which consists of 18 elements.
Correct answer: 18- A. s-Block
- B. p-Block
- C. d-Block
- D. f-Block
Explanation: Lanthanum is classified as a d-block element because its electron configuration ends with a d orbital (5d1).
Correct answer: d-Block- A. s-Block
- B. p-Block
- C. d-Block
- D. f-Block
Explanation: The d-block of the periodic table, also known as the transition metals block, contains the maximum number of metals.
Correct answer: d-Block- A. s-Block
- B. p-Block
- C. d-Block
- D. f-Block
Explanation: The given electronic configuration ends with 5d¹, indicating that the last electron is added to the d subshell, which characterizes…
Correct answer: d-Block- A. Atomic number
- B. Atomic mass
- C. Principal quantum number
- D. Azimuthal quantum number
Explanation: The correct answer is the Principal quantum number. In the modern periodic table, the period number of an element corresponds to the…
Correct answer: Principal quantum number- A. P
- B. As
- C. Sb
- D. Bi
Explanation: The metallic character of elements increases down a group in the periodic table because the atoms become larger and more willing to lose…
Correct answer: Bi- A. Li
- B. Na
- C. F
- D. N
Explanation: Sodium (Na) is considered a typical element because it is a part of the alkali metals in Group 1 of the periodic table.
Correct answer: Na- A. Be
- B. CI
- C. K
- D. P.
Explanation: The concept of bridge elements refers to elements that show a diagonal relationship between the second and third periods of the periodic…
Correct answer: Be- A. IIA
- B. IIIA
- C. VIIA
- D. 0
Explanation: The correct answer is Group IIA. This group is known as the alkaline earth metals and includes elements such as beryllium, magnesium, and…
Correct answer: IIA