JEE Chemistry S Block Elements MCQs Set A

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MCQ for Full Syllabus Chemistry S Block Elements

Full Syllabus Chemistry students should refer to the following multiple-choice questions with answers for S Block Elements in Full Syllabus.

S Block Elements MCQ Questions Full Syllabus Chemistry with Answers

 

 

Question: Group 2 elements are called alkaline earth metals why? Choose the correct reason(s).

(i) Hydroxides formed by group 2 elements are alkaline in nature.
(ii) Their metal oxides are found in the earth’s crust.
(iii) Their oxides are alkaline in nature
(iv) Group 2 elements react with alkalies.

  • a) (i), (ii) and (iii)
  • b) (i) and (ii)
  • c) (ii) and (iv)
  • d) (ii) and (iii)

Answer: (i), (ii) and (iii)

 

Question: Which of the following alkali metal is highly radioactive?

  • a) Francium
  • b) Rubidium
  • c) Caesium
  • d) None of these

Answer: Francium

 

Question: Which of the following are found in biological fluids Na+, Mg2+, Ca2+, K+, Sr2+, Li+ and Ba2+

  • a) Na+, K+, Mg2+and Ca2+
  • b) Sr+, Li and Ba2+
  • c) Na2 +and K+
  • d) None of these

Answer: Na+, K+, Mg2+and Ca2+

 

Question: Which of the following statements is not correct for alkali metals?

  • a) Alkali metals exist in free state in nature
  • b) Alkali metals are the most electropositive metals
  • c) These metals have the largest size in a particular period of the periodic table
  • d) None pf these

Answer: Alkali metals exist in free state in nature

 

Question: Which of the following has largest size ?

  • a) Na
  • b) Na
  • c) Na+
  • d) Can’t be predicted

Answer: Na

 

Question: Ionization potential of Na would be numerically the same as

  • a) electron affinity of Na+
  • b) electronegativity of Na+
  • c) electron affinity of He
  • d) ionization potential of Mg

Answer: electron affinity of Na+

 

Question: Which one of the following properties of alkali metals increases in magnitude as the atomic number rises ?

  • a) Ionic radius
  • b) Electronegativity
  • c) Melting point
  • d) First ionization energy.

Answer: Ionic radius

 

Question: Which of the following has density greater than water?

  • a) Rb
  • b) Na
  • c) K
  • d) None of these

Answer: Rb

 

Question: The elements of group 1 provide a colour to the flame of Bunsen burner due to

  • a) low ionization potential
  • b) low melting point
  • c) softness
  • d) presence of one electron in the outermost orbit

Answer: low ionization potential

 

Question: The metal that produces red-violet colour in the nonluminous flame is

  • a) Rb
  • b) Ba
  • c) Ag
  • d) Pb

Answer: Rb

 

Question: The alkali metals have low melting point. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?

  • a) Cs
  • b) K
  • c) Na
  • d) Rb

Answer: Cs

 

Question: In the case of the alkali metals

  • a) the cation is smaller than the atom
  • b) the cation is less stable than the atom
  • c) the cation and the atom have about the same size
  • d) the cation is larger than the atom

Answer: the cation is smaller than the atom

 

Question: Which of the following is not correct ?

  • a)

  • b) None of these
  • c)

  • d)

Answer:

 

Question: The element which on burning in air gives peroxide is

  • a) sodium
  • b) caesium
  • c) lithium
  • d) rubidium

Answer: sodium

 

Question: Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air ?

  • a) Li
  • b) Rb
  • c) K
  • d) Na

Answer:  Li

 

Question: Which of the following is used as a source of oxygen in space capsules, submarines and breathing masks ?

  • a) KO2
  • b) Li2O
  • c) Na2O2
  • d) K2O2

Answer: KO2

 

Question: The ionic mobility of alkali metal ions in aqueous solution is maximum for

  • a) Rb+
  • b) Na+
  • c) Li+
  • d) K+

Answer: Rb+

 

Question: For an aqueous solution under an electric field which of the following have lowest mobility ?

  • a) Li+
  • b) K+
  • c) Na+
  • d) Rb+

Answer: Li+

 

Question: Which of the following pairs of substances would give same gaseous product on reaction with water?

  • a) Ca and CaH2
  • b) Ba and BaO2
  • c) Na and Na2O2
  • d) Ca and CaO

Answer: Ca and CaH2

 

Question: Which is the most basic of the following?

  • a) Na2O
  • b) As2O3
  • c) BaO
  • d) Al2O3

Answer: Na2O

 

More Questions...............................

 

Question: Which hydride is most stable

  • a) LiH
  • b) KH
  • c) NaH
  • d) CsH

Answer: LiH

 

Question: The most stable compound is

  • a) LiF
  • b) LiCl
  • c) LiBr
  • d) LiI

Answer: LiF

 

Question: Which of the following represents a correct sequence of reducing power of the following elements?

  • a) Li > Cs > Rb
  • b) Cs > Li > Rb
  • c) Rb > Cs > Li
  • d) Li > Rb > Cs

Answer: Li > Cs > Rb

 

Question:  What is the colour of solution of alkali metals in liquid ammonia?

  • a) Blue
  • b) Violet
  • c) Bronze
  • d) Green

Answer: Blue

 

Question: The alkali metals dissolve in liquid ammonia giving deep blue solution. The solution is __x__. In concentrated solution, the blue colour changes to __y___ and becomes __z__

  • a) x = paramagnetic y = bronze z = diamagnetic
  • b) x = paramagnetic y = black z = diamagnetic
  • c) x = diamagnetic y = colourless z = paramagnetic
  • d) x = paramagnetic y = colourless z = diamagnetic

Answer: x = paramagnetic y = bronze z = diamagnetic

 

Question: Na metal is stored in

  • a) kerosene
  • b) toluene
  • c) C6H6
  • d) alcohol

Answer: kerosene

 

Question: Which of the following metal is used along with lithium to make the alloy named ‘white metal’

  • a) Lead
  • b) Aluminium
  • c) Nickel
  • d) Silver

Answer: Lead

 

Question: Which of the following metal is used as a coolant in breeder nuclear reactors?

  • a) Sodium
  • b) Rubidium
  • c) Potassium
  • d) Caesium

Answer: Sodium

 

Question: Which is most basic in character ?

  • a) CsOH
  • b) NaOH
  • c) KOH
  • d) LiOH

Answer: CsOH

 

Question: Which compound will show the highest lattice energy ?

  • a) NaF
  • b) RbF
  • c) CsF
  • d) KF

Answer: NaF

 

Question: In crystals which one of the following ionic compounds would you expect maximum distance between centres of cations and anions?

  • a) CsI
  • b) LiF
  • c) CsF
  • d) LiI

Answer: CsI

 

Question: Among LiI, NaI, KI, the one which is more ionic and more soluble in water is

  • a) KI
  • b) LiI
  • c) NaI
  • d) None of these

Answer: KI

 

Question: The products obtained on heating LiNO2 will be

  • a)

  • b)

  • c)

  • d)

Answer:

 

Question: On heating anhydrous Na2CO3, _____ is evolved

  • a) no gas
  • b) water vapour
  • c) CO2
  • d) CO

Answer: no gas

 

Question:

  • a)

  • b)

  • c)

  • d) None of these

Answer:

 

Question: Which of the following does not illustrate the anomalous properties of lithium?

  • a) Li is much softer than the other group I metals
  • b) Li forms a nitride Li3N unlike group I metals
  • c) The ion of Li and its compounds are more heavily hydrated than those of the rest of the group
  • d) The melting point and boiling point of Li are comparatively high

Answer: Li is much softer than the other group I metals

 

Question: Why lithium react less vigorously with water than other alkali metals?

  • a) Lithium has small size and very high hydration energy.
  • b)

  • c)

  • d) None of these

Answer: Lithium has small size and very high hydration energy.

 

Question: Identify the correct statement

  • a) Elemental sodium is easily oxidised
  • b) Elemental sodium is insoluble in ammonia
  • c) Elemental sodium is a strong oxidising agent
  • d) Elemental sodium can be prepared and isolated by electrolysing an aqueous solution of sodium chloride

Answer: Elemental sodium is easily oxidised

 

Question: Washing soda has formula

  • a) Na2CO3.10H2O
  • b) Na2CO3
  • c) Na2CO3.3H2O
  • d) None of these

Answer: Na2CO3.10H2O

 

Question: The process associated with sodium carbonate manufacture is known as

  • a) LeBlanc
  • b) Chamber
  • c) Haber
  • d) Castner

Answer: LeBlanc

 

Question: In Solvay ammonia process, sodium bicarbonate is precipitate due to

  • a) reaction with brine solution
  • b) reaction with NaOH
  • c) reaction with CO2
  • d) presence of NH3

Answer: reaction with brine solution

 

Question: Sodium carbonate is manufactured by Solvay process. The products which can be recycled are

  • a) CO2 and NH3
  • b) NaCl and CaO
  • c) CO2 and NH4Cl
  • d) CaCl2 and CaO.

Answer: CO2 and NH3

 

Question: How NH3 is recovered in Solvay process?

  • a) By reaction of NH4Cl and Ca(OH)2
  • b) By reaction of NH4HCO3 and NaCl
  • c) By reaction of (NH4)2CO3 with H2O
  • d) None of these

Answer: By reaction of NH4Cl and Ca(OH)2

 

Question: Why Solvay process cannot be extended to the manufacture of potassium carbonate?

  • a) Potassium hydrogen carbonate is too soluble to be precipitated by the addition of ammonium hydrogencarbonate to a saturated solution of potassium chloride.
  • b) Ammonium hydrogen carbonate does not react with potassium chloride
  • c) Ammonium carbonate is precipitated out instead of potassium hydrogen carbonate on reaction of ammonium hydrogen carbonate with potassium chloride
  • d) None of the above

Answer: Potassium hydrogen carbonate is too soluble to be precipitated by the addition of ammonium hydrogencarbonate to a saturated solution of potassium chloride.

 

Question:  Which of the following is/are present as impurity in crude sodium chloride, obtained by crystallisation of brine solution?

(i) Sodium sulphate        (ii) Calcium chloride
(iii) Magnesium chloride (iv) Potassium chloride

  • a) (i), (ii) and (iii)
  • b) (ii) and (iii)
  • c) (i), (ii) and (iv)
  • d) iv) (b) (ii) and (iii)

Answer: (i), (ii) and (iii)

 

Question: Which is manufactured by electrolysis of fused NaCl ?

  • a) Na
  • b) NaClO3.
  • c) NaOH
  • d) NaClO

Answer: Na

 

Question: Baking soda is

  • a) NaHCO3
  • b) Na2CO3
  • c) K2CO3
  • d) NaOH

Answer: NaHCO3

 

Question: Baking powder contains

  • a) NaHCO3, Ca(H2PO2)2 and starch
  • b) NaHCO3, Ca(H2PO2)2
  • c) NaHCO3, starch
  • d) NaHCO3

Answer:  NaHCO3, Ca(H2PO2)2 and starch

 

Question: Which of the following is the most abundant ion within cell fluids?

  • a) Potassium ions
  • b) None of these
  • c) Sodium ions
  • d) Calcium ions

Answer: Potassium ions

 

Question: Which of the following is non-metallic?

  • a) B
  • b) Mg
  • c) Be
  • d) Al

Answer: B

 

Question:  Electronic configuration of calcium atom may be written as

  • a) [Ar], 4s2
  • b) [Ar], 4p2
  • c) [Ne], 4p2
  • d) [Ne], 4s2

Answer: [Ar], 4s2

 

Question: The outer electronic configuration of alkaline earth metal is

  • a) ns2
  • b) np6
  • c) ns1
  • d) nd10

Answer: ns2

 

Question: Which of the following atoms will have the smallest size ?

  • a) Be
  • b) Mg
  • c) Na
  • d) Li

Answer: Be

 

Question: The first ionization energy of magnesium is lower than the first ionization energy of

  • a) Beryllium
  • b) Sodium
  • c) Lithium
  • d) Calcium

Answer: Beryllium

 

Question:  Which of the following relations is correct with respect to first (I) and second (II) ionization potentials of sodium and magnesium?

  • a)

  • b)

  • c)

  • d)

Answer:

 

Question: The first ionization energies of alkaline earth metals are higher than those of alkali metals. This is because

  • a) there is increase in the nuclear charge of alkaline earth metals
  • b) there is decrease in the nuclear charge of alkaline earth metals
  • c) there is no change in the nuclear charge
  • d) none of these

Answer: there is increase in the nuclear charge of alkaline earth metals

 

Question:  Which of the following has maximum ionization energy

  • a)

  • b)

  • c)

  • d)

Answer:

 

Question: The most electropositive amongst the alkaline earth metals is

  • a) barium
  • b) magnesium
  • c) beryllium
  • d) calcium

Answer: barium

 

Question: Alkaline earth metals are not found free in nature because of

  • a) their greater chemical reactivity
  • b) their high boiling points
  • c) their low melting points
  • d) their thermal instability

Answer:  their greater chemical reactivity

 

Question: A firework gives out crimson coloured light. It contains a salt of

  • a) Sr
  • b) Ca
  • c) Na
  • d) Ba

Answer: Sr

 

MCQs for S Block Elements Chemistry Full Syllabus

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