Free s-Block and p-Block Elements MCQs with Answers
1,359 s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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1,359 questions · page 13 of 68
- A. Acidic
- B. Basic
- C. Acidic and basic
- D. Neutral and acidic
Explanation: An amphoteric oxide reacts with both acids and bases, showing both basic and acidic behaviour, such as Al2O3.
Correct answer: Acidic and basic- A. Acidic
- B. Amphoteric
- C. Neutral
- D. All of the above
Explanation: Non-metal oxides are usually acidic because they react with water to form acids or with bases to form salts, as SO3 forms H2SO4.
Correct answer: Acidic- A. Ethylene iodide
- B. Ethylene bromide
- C. Ethylene chloride
- D. Ethylene fluoride
Explanation: Ethylene bromide, C2H4Br2, was added to leaded petrol so that it reacted with lead compounds and helped convert deposits into volatile…
Correct answer: Ethylene bromide- A. Decreasing ionization energy
- B. Having no effect on ionization energy
- C. Increasing ionization energy
- D. Increasing electronegativity
Explanation: The shielding effect of inner electrons causes a decrease in attraction between the nucleus and the outer electrons of the atom.
Correct answer: Decreasing ionization energy- A. HF
- B. HI
- C. HBr
- D. HCl
Explanation: Reducing power refers to the ability of a substance to reduce another substance by donating electrons.
Correct answer: HI- A. HI < HBr < HCl < HF
- B. CH4 < NH3 < H2O < HF
- C. Both of the above options
- D. Cannot be determined
Explanation: HI < HBr < HCl < HF is wrong. HI is the most acidic of all because iodine is the least electronegative among all halogen in the choices.
Correct answer: CH4 < NH3 < H2O < HF- A. Al
- B. S
- C. Si
- D. P
Explanation: Phosphorus (P) has the highest ionization energy among the options given because it is located in group 15 of period 3, where ionization…
Correct answer: P- A. Li < Be < Na < Mg
- B. Be < Li < Na < Mg
- C. Mg < Na < Li < Br
- D. Na < Li < Mg < Be
Explanation: Ionization energy generally increases from left to right across a period and decreases from top to bottom within a group.
Correct answer: Na < Li < Mg < Be- A. Ca+2 and SO42-
- B. Ca2+ and Mg2+
- C. SO42- and Cl-
- D. HCO3- and SO42-
Explanation: Hard water contains an excess of Ca2+ and/or Mg2+ ions, which form insoluble salts with soap, causing scum to form.
Correct answer: Ca2+ and Mg2+- A. Carbon dioxide and methane
- B. Carbon dioxide and nitric oxide
- C. Nitrogen and oxygen
- D. Water vapour and ozone
Explanation: Nitrogen and oxygen are not greenhouse gases, while carbon dioxide, methane, water vapor, and ozone are.
Correct answer: Nitrogen and oxygen- A. 2
- B. 3
- C. 4
- D. 8
Explanation: The period 7 is incomplete so far. It contains only two normal elements Fr87 and Ra88 , ten transition elements and fourteen inner…
Correct answer: 2- A. s
- B. p
- C. d
- D. f
Explanation: Elements in the periodic table can also be classified into four blocks.This classification is based upon the valence orbital of the…
Correct answer: d- A. Shell
- B. Sub-shell
- C. Orbital
- D. All
Explanation: The division of blocks in periodic table are based on subshell it means the valence shell electron are in that subshell Subshell are s,p,d,f
Correct answer: Sub-shell- A. Mg > Sr
- B. Ba > Mg
- C. Lu > Ce
- D. Cl > I
Explanation: Ba and magnsium are in same group . Ba comes after Mg it means it has more shell so it has large atomic sizeAtomic Radius:Atoms are so…
Correct answer: Ba > Mg- A. Atomic mass
- B. Atomic no.
- C. Mass no.
- D. All
Explanation: The atomic number has been established as the fundamental characteristic of elements based on the work on x-ray spectra of elements.
Correct answer: Atomic no.- A. CsH
- B. LiH
- C. HCl
- D. NaH
Explanation: The binary compounds of hydrogen with other elements are called hydrides.
Correct answer: HCl- A. B
- B. C
- C. O
- D. N
Explanation: Generally, smaller the atom, with greater nuclear charge, more strongly the electrons are bound to the nucleus, and hence higher the…
Correct answer: N- A. Na+is smaller than Na
- B. Na+is larger than Na
- C. Cl- is smaller than Cl
- D. Cl- ion and Cl are equal
Explanation: When a neutral atom loses one or more electrons, it becomes a positive ion.
Correct answer: Na+is smaller than Na259. The element with atomic number 9 is closest in chemical properties with element of atomic-number:
- A. 27
- B. 11
- C. 17
- D. 8
Explanation: As they belong to the same group, group 7A, they have the same chemical properties.
Correct answer: 17- A. s, p
- B. s, p, d
- C. s, p, f
- D. s, p, d, f
Explanation: The period 6 is also a long period, which contains thirty-two elements.
Correct answer: s, p, d, f