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 18 of 68
- A. Na2B4O7.10H2O
- B. Na2B4O7.7H2O
- C. Na2B4O7.5H2O
- D. Na2B4O7.3H2O
- E. Na2B4O7.H2O
Explanation: Na2B4O7.10H2O . This is just a fact that should be recalled in the exam.
Correct answer: Na2B4O7.10H2O- A. s-block
- B. p-block
- C. d-block
- D. f-block
- E. None of the above
Explanation: The d-block elements are the outer transition elements as opposed to the f-block, which are the inner transition elements.
Correct answer: d-block- A. Their bond energy is low
- B. They easily absorb energy
- C. Splitting of the five degenerate d-orbitals take place
- D. The d-orbitals are very close to p-orbitals
- E. Degenerate p-orbitals are present
Explanation: The reason why transition metals, in particular, are colorful is that they have unfilled or half-filled d orbitals.
Correct answer: Splitting of the five degenerate d-orbitals take place- A. S block elements
- B. P block elements
- C. D block elements
- D. Noble gases
Explanation: At the end of the periodic table noble gases are found as shown below:
Correct answer: Noble gases- A. None of these
- B. CI2
- C. O2
- D. N2
- E. Na
Explanation: Chlorine gas does react with calcium oxide (CaO) to form calcium chloride (CaCl2):Cl2 + CaO → CaCl2But it doesnot react with NaHCO3
Correct answer: CI2- A. It is a covalent compound
- B. It is a gas with bad smell
- C. It is a stronger reducing agent than H2O
- D. It is a weak base in water
Explanation: H2S acts as weak acid in water, not as a weak base. In H2S, the influence of the nucleus is less and hence, it can give away its electrons.
Correct answer: It is a weak base in water- A. Ca
- B. Na
- C. Be
- D. Mg
Explanation: Ionization potential or ionisation potential is the amount of energy required to remove an electron from an isolated gaseous atom to form…
Correct answer: Be- A. Na
- B. Ca
- C. Mn
- D. F
- E. Ne
Explanation: The first ionization of an element refers to the amount of energy needed to remove one electron from an atom.
Correct answer: Na- 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