S Block Elements MCQ. We covered all the S Block Elements MCQ in this post for free so that you can practice well for the exam.
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MCQ on S Block Elements for NEET Students
Alkali metals are soluble in liquid NH3 and form solutions that are conducting in nature. As the concentration of metal in the solution increases, the magnetic property of the solution changes from ………
(A) diamagnetic to paramagnetic
(B) paramagnetic to diamagnetic
(C) ferromagnetic to paramagnetic
(D) paramagnetic to ferromagnetic
Option b – paramagnetic to diamagnetic
Metal ‘A’ belongs to group 1 and period 2. Metal ‘B’ belongs to group 2. Metal ‘A’ shows the diagonal relationship to metal ‘B’. Identify metals ‘A’ and ‘B’ respectively.
(A) Be; Al
(B) Li; Be
(C) Li; Mg
(D) Li; Al
Option c – Li; Mg
Which of the following statement is INCORRECT about BeCl₂?
(A) It is covalent and soluble in organic solvents.
(B) It has a chain structure in a solid state.
(C) It exists as a linear monomer at high temperatures (1200 K).
(D) It exists as a chloro-bridged trimer in the vapor phase.
Option d – It exists as a chloro-bridged trimer in the vapor phase.
……… is prepared by electrolysis of brine in Castner-Kellner cell.
(A) Sodium carbonate
(B) Sodium hydroxide
(C) Sodium chloride
(D) Sodium bicarbonate
Option b – Sodium hydroxide
An alkaline earth metal (X) forms amphoteric oxide. The ground state electronic configuration of X is ……….
(A) [He] 2s²
(B) [He] 2s¹
(C) [Ne] 3s²
(D) [He] 2s²2p¹
Option a – [He] 2s²
When a white substance (A) was treated with dil.HCl, a colorless gas (B) evolved. This gas turns moist blue litmus paper to red. On bubbling (B) through lime water, a precipitate (C) was obtained but on further passage of (B), a clear solution (D) was formed. The compounds (A) and (D) are ……….. respectively.
(A) CaCO3, NaHCO3
(B) CaCl₂, Ca(HCO3)2
(C) CaCO3, Ca(HCO3)2
(D) Ca(OH)2, CaCO3
Option c – CaCO3, Ca(HCO3)2
Which of the following has the lowest melting point?
(A) Sodium chloride
(B) Sodium fluoride
(C) Sodium bromide
(D) Sodium iodide
Option d – Sodium iodide
The concentration of ……….. in plasma is maintained by two hormones: parathyroid hormone and calcitonin.
(A) potassium
(B) sodium
(C) calcium
(D) magnesium
Option c – calcium
Select the appropriate option regarding the following statements 1, 2, and 3. Statement 1: Lithium is much softer than other alkali metals. Statement 2: Lithium is the strongest reducing among alkali metals. agent Statement 3: Lithium has the lowest density among alkali metals
(A) Only statement 1 is incorrect.
(B) Only statement 2 is incorrect.
(C) Both statements 1 and 2 are incorrect.
(D) All three statements are incorrect.
Option a – Only statement 1 is incorrect.
Which of the following is INCORRECT about rubidium?
(A) It is placed in period 5 of the modern periodic table.
(B) It reacts with oxygen to form superoxide.
(C) It reacts with water less vigorously than sodium.
(D) It has a lower ionization enthalpy value than sodium.
Option c – It reacts with water less vigorously than sodium.
Assertion: Cs atom is larger than the K atom. Reason: Cs atom has lower ionization energy than the K atom.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, and the Reason is true.
Option b – Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
The gas liberated when calcium carbonate is treated with dilute sulphuric acid is ……….
(A) H₂
(B) CO₂
(C) SO₂
(D) 0₂
Option b – CO₂
Sodium and potassium are responsible for ……..
(A) the cell membrane integrity and blood coagulation
(B) the development of bones and teeth
(C) the transmission of nerve signals
(D) all of these
Option c – the transmission of nerve signals
When an alkali metal reacts with water, ‘X’ and hydrogen are formed. ‘X’ is a strong base and is used in the textile industries for mercerizing cotton fabrics. Identify ‘X’.
(A) KOH
(B) Na₂CO3
(C) NaOH
(D) Na₂O₂
Option c – NaOH
Which of the following is unstable and can be kept only in an atmosphere of CO₂?
(A) BeCO3
(B) MgCO3
(C) CaCO3
(D) BaCO3
Option a – BeCO3
When sodium burns in oxygen, the oxidation number of oxygen changes from :
(A) 0 to-1
(B) 0 to-2
(C) -1 to-2
(D) +1 to -1
Option a – 0 to-1
The electropositive character increases in the order :
(A) Ba<Mg < Ca < Sr< Be
(B) Be<Mg < Ca<Ba < Sr
(C) Ba<Sr<Ca<Mg<Be
(D) Be <Mg < Ca<Sr< Ba
Option d – Be
When the flame test is performed, …….. imparts characteristic crimson-red color to the Bunsen flame.
(A) Ca
(B) Na
(C) Li
(D) Ba
Option c – Li
The CORRECT order of mobilities of the alkali metal ions in an aqueous solution is :
(A) Li< Na <K <Rb <Cs
(B) Na <K <Li < Rb <Cst
(C) Cs < Rb + <K <Na < Li
(D) Li < Na <K <Cs < Rb
Option a – Li
Slaked lime is obtained by ………
(A) addition of a limited amount of water to quicklime
(B) addition of a limited amount of water to caustic soda
(C) slaking quick lime with caustic soda
(D) heating limestone at 1070 -1270 K
Option a – addition of a limited amount of water to quicklime
CO₂ and water along with solid (Y) are obtained when sodium salt (X) is heated. (X) is again obtained when an aqueous solution of (Y) is saturated with CO₂ gas. (X) and (Y) are ……… respectively.
(A) Na₂CO3, Na2O2
(B) NaHCO3, NaOH
(C) NaHCO3, Na₂CO3
(D) Na₂CO3, NaHCO3
Option c – NaHCO3, Na₂CO3
Which among the following is the strongest base?
(A) Be(OH)2
(B) Mg(OH)2
(C) Ca(OH)₂
(D) Ba(OH)2
Option d – Ba(OH)2
On heating a mixture containing 1 mole each of Li₂CO3 and K₂CO3 ………. is/are formed.
(A) 2 moles of CO₂
(B) 1 mole of CO2
(C) 1.5 moles of CO₂
(D) no carbon dioxide
Option b – 1 mole of CO2
What is the mass of solid residue obtained when anhydrous calcium nitrate undergoes 4.10 g of thermal decomposition?
(A) 0.25 g
(B) 1.40 g
(C) 2.70 g
(D) 2.80 g
Option b – 1.40 g
Which of the following statements is CORRECT? (I) Beryllium halides are soluble in organic solvents. (II) Beryllium sulphate is readily soluble in water. (III) Beryllium exhibits coordination numbers of more than four. (IV) Beryllium oxide is purely acidic in nature.
(A) (I), (II)
(B) (II), (III)
(C) (III), (IV)
(D) (I), (IV)
Option a – (I), (II)
Find the INCORRECT match.
(A) Lithium-lead alloy: Used to make bearings for motor engines
(B) Liquid sodium metal Used as a coolant in fast-breeder nuclear reactors
(C) Lithium: Used to make electrochemical cells
(D) Potassium chloride: Used as an excellent absorbent of carbon dioxide
Option d – Potassium chloride: Used as an excellent absorbent of carbon dioxide
Among the following, ……… has the highest first ionization enthalpy.
(A) Ca
(B) Be
(C) Na
(D) Mg
Option b – Be
Ra and Fr are ……… metals respectively.
(A) alkali and alkaline earth
(B) alkaline earth and alkali
(C) transition and alkali
(D) alkaline earth and transition
Option b – alkaline earth and alkali
Identify the INCORRECT statement.
(A) Lithium chloride is deliquescent and crystallizes from an aqueous solution as a hydrate.
(B) Lithium hydrogen carbonate is not obtained in the solid form.
(C) Lithium nitrate when heated decomposes to give nitrite.
(D) Lithium chloride is soluble in pyridine.
Option c – Lithium nitrate when heated decomposes to give nitrite.
Which of the following is present in the highest percentage of Portland cement?
(A) CaO
(B) Fe₂O3
(C) SiO₂
(D) MgO
Option a – CaO
The change in magnitude of the lattice enthalpy, the hydration enthalpy, and the solubility of the hydroxides, respectively, on moving down group 2 are :
(A) decreases; decreases; decreases
(B) decreases; decreases; increases
(C) decreases; increases; increases
(D) increases; decreases; decreases
Option b – decreases; decreases; increases
How many of the following do NOT form hydrates? SrCl2, NaCl, MgCl2, KCl, BaCl2, CaCl₂
(A) 1
(B) 2
(C) 3
(D) 4
Option b – 2
Which of the following is INCORRECT? ( S Block Elements MCQ )
(A) Alkali metals react with water to form hydrogen gas.
(B) Alkali metals are normally kept in kerosene oil.
(C) Alkali metals are strong oxidizing agents.
(D) Alkali metals are silvery-white, soft, and light metals.
Option c – Alkali metals are strong oxidizing agents.
In context with beryllium, which one of the following statements is INCORRECT?
(A) It is readily attacked by dilute mineral acids.
(B) BeF₂ is prepared by thermal decomposition by (NH4)2BeF4.
(C) Its sulphate is readily soluble in water.
(D) It forms compounds that are largely covalent and get easily hydrolyzed.
Option a – It is readily attacked by dilute mineral acids.
Assertion: Solvay process cannot be used to manufacture potassium carbonate. Reason: Potassium hydrogen carbonate is too soluble to be precipitated by the addition of ammonium hydrogen carbonate to a saturated solution of potassium chloride.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, Reason is true.
Option a – Assertion and Reason are true. The reason is the correct explanation of the Assertion.
An alkaline earth metal (X) is used in flash powders and incendiary bombs. The carbonate of this metal is an ingredient of toothpaste. The hydroxide of this metal is basic in nature. Which of the following is metal “X”?
(A) Beryllium
(B) Magnesium
(C) Barium
(D) Calcium
Option b – Magnesium
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