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 14 of 31
- A. Decreases
- B. Increases
- C. I st increase and then decrease
- D. Ist decrease and then increase
Explanation: Ionic radius decreases moving from left to right across a row or period.
Correct answer: Decreases- A. 7 horizontal series, 7 vertical series and 2 blocks
- B. 8 horizontal series, 7 vertical series and 2 blocks
- C. 7 horizontal series, 18 vertical series and 4 blocks
- D. 8 horizontal series, 18 vertical series and 8 blocks
Explanation: The periodic table has 18 vertical series called groups, 7 horizontal series called periods, and 4 blocks called s block, p block, d…
Correct answer: 7 horizontal series, 18 vertical series and 4 blocks- A. K2Cr2O7
- B. CrCl3
- C. CrO3
- D. K2CrO4
Explanation: i.Oxidation state in K2Cr2O7=2+2x+(-14)=0 =2x=12;x=6.ii.Oxidation state in CrCl3=x+(-3)=0 =x=3iii.Oxidation state in CrO3=x+(-6)=0…
Correct answer: CrCl3- A. Glycine
- B. V2O5
- C. Fe
- D. Traces of Cl2
Explanation: Cl2 is used as a catalyst in decomposition of N2O4.
Correct answer: Traces of Cl2- A. Sterilization of drinking water
- B. Oxidation of alcohols
- C. Bleaching Linen
- D. Preparation of Chlorine
Explanation: Bleaching powder is used in the preparation of chlorine that is used in sterilization water.
Correct answer: Oxidation of alcohols- A. Nitrous acid
- B. Nitric oxide
- C. Nitrosyl chloride
- D. Nascent nitrogen
Explanation: Aqua regia is formed upon mixing of concentrated hydrochloric acid and concentrated nitric acid, chemical reactions occur.
Correct answer: Nitrosyl chloride- A. Cr2O3
- B. CrO2Cl2
- C. CrOCl2
- D. CrCl3
Explanation: Chromyl chloride is the inorganic compound with the formula CrO₂Cl₂.
Correct answer: CrO2Cl2- A. N2CO3
- B. Na2CO3 . H2O
- C. Na2CO3 . 7H2O
- D. Na2CO3 . 10 H2O
Explanation: Sodium carbonate decahydrate (Na2CO3·10H2O), also known as washing soda, is the most common hydrate of sodium carbonate containing 10…
Correct answer: Na2CO3 . 10 H2O- A. 260 Degree Celsius
- B. 360 Degree Celsius
- C. 630 Degree Celsius
- D. 690 Degree Celsius
Explanation: It's a fact. P2O5 is a white, hygroscopic powder that readily absorbs water from the air.
Correct answer: 360 Degree Celsius- A. IIB
- B. IVB
- C. IIIB
- D. VIB
- E. No definite answer
Explanation: Binding energy is directly proportional to the number of unpaired electrons.
Correct answer: VIB- A. Fe(OH)3
- B. V2O5
- C. Fe2O3
- D. H2S2O7
Explanation: Arsenic impurities can act as poison for catalytic activity. (Fact) In the contact process, the catalyst used is vanadium pentoxide, V2O5…
Correct answer: V2O5- A. Decreases down the groups
- B. Increases down the groups
- C. Remains the same across the periods
- D. Increases across the periods
Explanation: The correct answer is that metallic character increases down the groups.
Correct answer: Increases down the groups- A. 2H2O + NOCl + Cl2
- B. H2 + NOCl + 2HOCl
- C. H2O + NOCl + 2HCl
- D. 2H2O + NOCl + 2Cl
Explanation: The reaction of HNO3 with HCl in a 1:3 molar ratio forms aqua regia, generating water (H2O), nitrosyl chloride (NOCl), and chlorine gas…
Correct answer: 2H2O + NOCl + Cl2- A. Sodium carbonate
- B. Sodium bicarbonate
- C. Sodium hydroxide
- D. Sodium metal
Explanation: Down's cell is a method for obtaining sodium metal by the electrolysis of molten sodium chloride.
Correct answer: Sodium metal- A. Na2B2O7 . 10H2O
- B. Na2B4O7 . H2O
- C. Na2B4O7 . 10H2O
- D. Na2B2O5 . 10H2O
Explanation: The chemical formula of Tincal, also known as borax, is Na2B4O7 . 10H2O.
Correct answer: Na2B4O7 . 10H2O- A. I-A, V-A and VIII-A
- B. I-A, IV-A and VI-A
- C. I-A, II-A and VII-A
- D. I-A, IV-A and VII-A
Explanation: Hydrogen is unique in its periodic behavior but shows similarities to several groups.
Correct answer: I-A, IV-A and VII-A- A. Because of high melting point
- B. Because d-electrons of outer shell take part in bonding
- C. Because s-electrons of outer shell take part in bonding
- D. Both s and d electrons takes part in bonding
Explanation: The toughness of these metals indicates strong metallic binding. This is because, apart from s-electrons of the outermost shell, the…
Correct answer: Both s and d electrons takes part in bonding- A. A compound in which a metal atom or ion is covalently bonded with a group of neutral molecules or anions.
- B. A compound that contains 2 or more than 2 different elements
- C. A compound which has complex molecular geometry
- D. A compound that contains a complex ion and can exist independently
Explanation: A coordination complex is the product of a Lewis acid-base reaction in which neutral molecules or anions (called ligands) bond to a…
Correct answer: A compound in which a metal atom or ion is covalently bonded with a group of neutral molecules or anions.- A. Outermost s orbital and p orbitals
- B. Outermost d orbital and underlying half filled f-orbitals
- C. Outermost p orbital and underlying half filled d-orbitals
- D. Outermost s orbital and underlying half filled d-orbitals
Explanation: Outermost s orbitals and underlying half filled d orbitals take part in binding of transition elements.
Correct answer: Outermost s orbital and underlying half filled d-orbitals- A. Na
- B. K
- C. Mg
- D. Al
Explanation: In general, ionisation enthalpy increases across the period (left to right) on account of the increase of effective nuclear charge while…
Correct answer: K