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 30 of 31
- A. energy of dissociation
- B. electron affinity of atoms
- C. hydration energies of lons
- D. all of the above
Explanation: The halogens D are good oxidizers The oxidizing power of halogens in an aqueous medium depends on their electron affinity, bond…
Correct answer: all of the above- A. Helium
- B. Neon
- C. argon
- D. Xenon
Explanation: All of the noble gases are completely inert except for xenon. Under normal conditions, xenon is non-reactive, but at extreme temperatures…
Correct answer: Xenon- A. hydrogen gas
- B. salt and water
- C. a base
- D. An acid
Explanation: Non-metals are the elements that form negative ions by accepting or gaining electrons.
Correct answer: An acid- A. bromine
- B. chlorine
- C. fluorine
- D. iodine 200
Explanation: For all elements in general, the higher the atomic number, the smaller the 1s orbital. The 1s orbital is closest to the nucleus.
Correct answer: iodine 200- A. NaAlO3
- B. Na3Al2O6
- C. NaAlO2
- D. NaAl2O3
Explanation: The reaction between sodium hydroxide (NaOH) and aluminum oxide (Al2O3) results in the formation of sodium aluminate (NaAlO2) and water.
Correct answer: NaAlO2- A. 1s2 2s2 2p3
- B. 1s2 2s2 2p4
- C. 1s2 2s2 2p6 3s1
- D. 1s2 2s2 2p6 3s2 3p3
Explanation: Ionization energy is the energy required to remove an electron from an isolated gaseous atom.
Correct answer: 1s2 2s2 2p3- A. Increases
- B. Decreases
- C. Remains unchanged
- D. First increases and then decreases
Explanation: Down the group, from fluorine to iodine the reactivity increases as the bond energy decreases, making it easier for the phosphorus…
Correct answer: Increases- A. HCIO
- B. HCIO2
- C. HCIO3
- D. HCIO4
Explanation: a) HCIO (Hypochlorous acid):This is the correct option. Hypochlorous acid (HCIO) is a weak acid with the chemical formula HClO.
Correct answer: HCIO- A. K2O
- B. MgO
- C. ZnO
- D. CaO
Explanation: Zinc oxide (ZnO) is the correct answer because it is an amphoteric oxide.
Correct answer: ZnO- A. H2S2O3
- B. H2S2O5
- C. H2S2O6
- D. H2S2O7
Explanation: The correct answer is H2S2O7, which represents oleum. Oleum is formed when sulfur trioxide (SO3) is dissolved in sulfuric acid (H2SO4)…
Correct answer: H2S2O7- A. Fe
- B. Co
- C. Ni
- D. Cu
Explanation: Atomic radius decreases across a period since all these elements belong to the same period of the d-block, copper is the last element in…
Correct answer: Cu- A. NaCl
- B. MgCl2
- C. KCl
- D. AlCl3
Explanation: The correct answer is KCl because it forms the most ionic bond among the options provided.
Correct answer: KCl- A. Ionization energy depends upon the magnitude of nuclear charge
- B. Ionization energy depends upon the atomic radius
- C. Ionization energy depends upon the shielding effect
- D. Ionization energy does not depend upon the penetration effect of the inner orbital
Explanation: Option D is the correct answer because it incorrectly states that ionization energy does not depend on the penetration effect.
Correct answer: Ionization energy does not depend upon the penetration effect of the inner orbital- A. HBO2
- B. HFO2
- C. H3PO3
- D. HBrO2
Explanation: HBrO2(aq) is bromous acid and HIO2(aq) is iodous acid. Like many of the oxyacids, the molecules of HBrO2 (hydrogen bromite) and HIO2…
Correct answer: HFO2- A. Charge on nucleus
- B. Screening effect
- C. Electronic configuration
- D. All of the above
Explanation: Ionization energy, also called ionization potential is the amount of energy required to remove an electron from an isolated atom or…
Correct answer: All of the above- A. XYZ
- B. XZY
- C. YXZ
- D. ZXY
Explanation: In a given period of the periodic table, the nature of oxides changes from basic to amphoteric to acidic as you move from left to right.
Correct answer: YXZ- A. Sc3+
- B. Li2+
- C. Ba3+
- D. Na+
Explanation: In aqueous medium, due to extremely large hydration energy (energy evolved when a substance is hydrolysed), in aqueous medium, Li+ is more…
Correct answer: Na+- A. Yellow Colored solution
- B. Greenish Colored solution
- C. Bluish Colored solution
- D. Colorless solution
Explanation: Chlorine gas dissolves in water, forming a greenish solution called perchloric acid.
Correct answer: Greenish Colored solution- A. Phosphoruss (iii) oxide
- B. Phosphoruss (v) oxide
- C. Phosphorus (ii) oxide
- D. Both (A) & (B)
Explanation: When white phosphorus burns in air, it undergoes a slow combustion reaction to form phosphorus (I) oxide, which is also known as…
Correct answer: Both (A) & (B)- A. Mo(ii)
- B. Mo(iii)
- C. Mo(v)
- D. Mo(vi)
Explanation: Students should learn the Mo(ii) has the lowest oxidation state and highest electronegativity.Compared to the other given oxidation states…
Correct answer: Mo(ii)