MCQs For NCERT Class 11 Chemistry Chapter 10 The S-Block Elements

Please refer to the MCQ Questions for Class 11 Chemistry Chapter 10 The S-Block Elements with Answers. The following The S-Block Elements Class 11 Chemistry MCQ Questions have been designed based on the latest syllabus and examination pattern for Class 11. Our experts have designed MCQ Questions for Class 11 Chemistry with Answers for all chapters in your NCERT Class 11 Chemistry book.

The S-Block Elements Class 11 MCQ Questions with Answers

See below The S-Block Elements Class 11 Chemistry MCQ Questions, solve the questions and compare your answers with the solutions provided below. 

Question. Which of the following atoms will have the smallest size ?
(a) Mg
(b) Na
(c) Be
(d) Li

Question. The first ionization energy of magnesium is lower than the first ionization energy of
(a) Lithium
(b) Sodium
(c) Calcium
(d) Beryllium

Question. Which of the following has maximum ionization energy
(a) Ba→Ba⁺ + e⁻
(b) Be→Be⁺ + e⁻
(c) Ca→Ca²⁺ + 2e⁻
(d) Mg →Mg ²⁺ + 2e⁻

Question. The most electropositive amongst the alkaline earth metals is
(a) beryllium
(b) magnesium
(c) calcium
(d) barium

Question. Alkaline earth metals are not found free in nature because of
(a) their thermal instability
(b) their low melting points
(c) their high boiling points
(d) their greater chemical reactivity

Question. A firework gives out crimson coloured light. It contains a salt of
(a) Ca
(b) Na
(c) Sr
(d) Ba

Question. Which of the following relations is correct with respect to first (I) and second (II) ionization potentials of sodium and magnesium?
(a) I_Mg = II_Na
(b) I_Mg < II_Na
(c) I_Na > I_Mg
(d) II_Na > II_Mg

Question. The first ionization energies of alkaline earth metals are higher than those of alkali metals. This is because
(a) there is no change in the nuclear charge
(b) there is decrease in the nuclear charge of alkaline earth metals
(c) there is increase in the nuclear charge of alkaline earth metals
(d) none of these

Question. Following are colours shown by some alkaline earth metals in flame test. Which of the following are notcorrectly matched? Metal Colour
(i) Calcium Apple green
(ii) Strontium Crimson
(iii) Barium Brick red
(a) (i) and (iii)
(b) (i) only
(c) (ii) only
(d) (ii) and (iii)

Question. In the reaction 2 Mg + H₂O →X + H ; X is
(a) MgO (steam)
(b) Mg(OH)₂
(c) MgH₂
(d) None of these

Question. The metals A and B form oxide but B also forms nitride when both burn in air. The A and B are
(a) Cs, K
(b) Mg, Ca
(c) Li, Na
(d) K, Mg

Question. Which of the following is the best method for preparation of BeF₂?
(a) Reaction of Be with F₂
(b) Thermal decomposition of (NH₄)₂BeF₄
(c) Reaction of Be with HF
(d) All of the above are equally effective

Question. Arrange the following compounds in order of increasing solubility
(i) MgF₂
(ii) CaF₂,
(iii) BaF₂
(a) (i) < (ii) < (iii)
(b) (ii) < (i) < (iii)
(c) (ii) < (iii) < (ii)
(d) (iii) < (ii) < (i)

Question. Alkaline earth metals are
(a) reducing agent
(b) amphoteric
(c) dehydrating agent
(d) oxidizing agent

Question. Which one of the following properties of alkali metals increases in magnitude as the atomic number rises ?
(a) Ionic radius
(b) Melting point
(c) Electronegativity
(d) First ionization energy

Question. Out of the following elements which one do you expect to be most reactive, chemically ?
(a) Mg
(b) Ca
(c) Sr
(d) Ba

Question. The oxidation state shown by alkaline earth metals is
(a) +2
(b) +1, +2
(c) –2
(d) –1, –2

Question. Of the metals Be, Mg, Ca and Sr of group 2 A. In the periodic table the least ionic chloride would be formed by
(a) Be
(b) Mg
(c) Ca
(d) Sr

Question. The order of solubility of sulphates of alkaline earth metals in water is
(a) Be > Mg > Ca > Sr > Ba
(b) Mg > Be >> Ba > Ca > Sr
(c) Be > Ca > Mg > Ba >> Sr
(d) Mg > Ca > Ba >> Be > Sr

Question. The solubilities of carbonates decrease down the magnesium group due to a decrease in
(a) hydration energies of cations
(b) inter-ionic attraction
(c) entropy of solution formation
(d) lattice energies of solids

Question. The correct order of increasing thermal stability of K₂CO₃, MgCO₃, CaCO₃ and BeCO₃ is
(a) BeCO₃< MgCO₃ < CaCO₃ < K₂CO₃
(b) MgCO₃ < BeCO₃ < CaCO₃ < K₂CO₃
(c) K₂CO₃ < MgCO₃ < CaCO₃ < BeCO₃
(d) BeCO₃ < MgCO₃ < K2CO₃ < CaCO₃

Question. In which of the following the hydration energy is higher than the lattice energy?
(a) MgSO₄
(b) RaSO₄
(c) SrSO₄
(d) BaSO₄

Question. Which one of the following is the most soluble in water?
(a) Mg(OH)₂
(b) Sr(OH)₂
(c) Ca(OH)₂
(d) Ba(OH)₂

Question. Which of the following alkaline earth metal hydroxides is amphoteric in character
(a) Be(OH)₂
(b) Ca(OH)₂
(c) Sr(OH)₂
(d) Ba(OH)₂

Question. Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?
(a) CaSO₄
(b) BeSO₄
(c) BaSO₄
(d) SrSO₄

Question. Plaster of Paris is
(a) CaSO₄.2H₂O
(b) CaSO₄.H₂O
(c) CaSO₄ . 1 /2H₂O
(d) CaSO₄.4H₂O

Question. Gypsum on heating at 120 – 130°C gives
(a) anhydrous salt
(b) hemihydrate
(c) monohydrate
(d) dihydrate

Question. Plaster of Paris on making paste with little water sets to hard mass due to formation of
(a) CaSO₄
(b) CaSO₄.1/2H₂O
(c) CaSO₄.H₂O
(d) CaSO₄.2H₂O

Question. The chemical which is used for plastering the broken bones is
(a) (CaSO₄)₂H₂O
(b) MgSO₄.7H₂O
(c) FeSO₄. 7H₂O
(d) CuSO₄. 5H₂O

Question. Dead burn plaster is
(a) CaSO₄.2H₂O
(b) MgSO₄. 7H₂O
(c) CaSO₄.½ H₂O
(d) CaSO₄

Question. Beryllium shows diagonal relationship with aluminium. Which of the following similarity is incorrect ?
(a) Be forms beryllates and Al forms aluminates
(b) Be(OH)₂ like Al(OH)₃ is basic.
(c) Be like Al is rendered passive by HNO₃ .
(d) Be₂C like Al4C₃ yields methane on hydrolysis.

Question. The substance not likely to contain CaCO₃ is
(a) gypsum
(b) sea shells
(c) dolomite
(d) a marble statue

Question. Mortar is a mixture of
(a) CaCO₃, sand and water
(b) slaked lime and water
(c) slaked lime, sand and water
(d) CaCO₃ and CaO

Question. Which gas is released when CaCO₃ reacts with dilute HCl?
(a) H₂
(b) CO₂
(c) O₂
(d) Cl₂

Question. Setting of cement is an
(a) exothermic reaction
(b) endothermic reaction
(c) neither endothermic nor exothermic
(d) example of neutralisation reaction

Question. Calcitonin and parathyroid hormone regulate concentration of which of the following element in plasma?
(a) Calcium
(b) Magnesium
(c) Sodium
(d) Potassium

Question. The formula for calcium chlorite is
(a) Ca(ClO₄)₂
(b) Ca(ClO₃)₂
(c) CaClO₂
(d) Ca(ClO₂)2

Question. Bone ash contains
(a) CaO
(b) CaSO₄
(c) Ca₃ (PO₄)₂
(d) Ca(H₂PO₄)₂

Question. Which of the following metal is found in green colouring pigment chlorophyll of plants?
(a) Fe
(b) Mg
(c) Na
(d) Al

Question. Which of the following statement(s) is/are correct regarding Li₂CO₃ and Na2CO₃ ?
(i) Sodium salt evolve CO₂ at higher temperature.
(ii) Polarization of Na⁺ is lesser than that of Li⁺.
(a) Both statements (i) and (ii) are correct
(b) Both statements (i) and (ii) are incorrect
(c) Statement (ii) is correct explanation for statement (i)
(d) Statement (i) is correct explanation for statement (ii)

Question. Which of the following sequence of T and F is correct for given statements?
(i) The alkali metal hydroxides are the strongest of all bases.
(ii) All alkali metal halides have high negative enthalpies of formation.
(iii) The stability of the carbonates and hydrogen carbonates of alkali metals decrease with increase in electropositive character down the group.
(iv) Only LiHCO₃ exist as solid.
(a) TTFF
(b) TTTT
(c) FTFT
(d) TFFT

Question. Which of the following statement(s) is/are correct?
(i) The atomic and ionic radii of alkaline earth metals are smaller than those of the corresponding alkali metals in the same periods.
(ii) Second ionisation enthalpies of the alkaline earth metals are smaller than those of the corresponding alkali metals.
(iii) Compounds of alkaline earth metals are more extensively hydrated than those of alkali metals
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (i), (ii) and (iii)

Question. Select the correct statements
(i) Cs⁺ is more highly hydrated that the other alkali metal ions
(ii) Among the alkali metals Li, Na, K and Rb, lithium has the highest melting point
(iii) Among the alkali metals only lithium forms a stable nitride by direct combination with nitrogen
(a) (i), (ii) and (iii)
(b) (i) and (ii)
(c) (i) and (iii)
(d) (ii) and (iii)

Question. Which of the following sequence of T and F is correct for alkali metals ? Here T represents True and F represents False statement.
(i) Alkali metal hydrides are ionic solids with high melting point.
(ii) All alkali halides are ionic in nature.
(iii) Li is the least powerful reducing agent and Na is the most powerful reducing agent.
(a) TTT
(b) TFT
(c) FTF
(d) TFF

Question. Which of the following statement(s) is/are correct regarding Al and Be ?
(i) Both of these react with alkali.
(ii) There is diagonal relationship among these elements.
(a) Both (i) and (ii)
(b) Only (i)
(c) Only (ii)
(d) Neither (i) nor (ii)

Question. The melting point of lithium (181°C) is just double the melting point of sodium (98°C) because
(a) down the group, the hydration energy decreases
(b) down the group, the ionization energy decreases
(c) down the group the cohesive energy decreases
(d) None of these

Question. Li has the maximum value of ionisation potential among alkali metals i.e. lithium has the minimum tendency to ionise to give LI⁺ ion. Thus, in aq. solution lithium is
(a) strongest reducing agent
(b) poorest reducing agent
(c) strongest oxidising agent
(d) poorest oxidising agent

Question. Lithium is strongest reducing agent among alkali metals due to which of the following factor?
(a) Ionization energy
(b) Electron affinity
(c) Hydration energy
(d) Lattice energy

Question. Which of the following statements is incorrect?
(a) Alkali metal hydroxide are hygroscopic
(b) Dissolution of alkali metal hydroxide is endothermic
(c) Aqueous solution of alkali metal hydroxides are strongly basic
(d) Alkali metal hydroxides form ionic crystals

Question. Which of the following on thermal decomposition yields a basic as well as acidic oxide ?
(a) NaNO₃
(b) KClO₃
(c) CaCO₃
(d) NH₄NO₃