s-Block Elements

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Group 1: Alkali Metals

Subtopic

Group 1: Alkali Metals under s-Block Elements for Grade 11 ICSE.

Preview questions (no answers)

1.
$The second ionization enthalpy of alkali metals is exceptionally high because:$
A. $They have a large atomic size$
B. $They have a noble gas configuration after losing one electron$
C. $The effective nuclear charge decreases$
D. $They are highly electropositive$
2.
$Which is the most abundant alkali metal in the human body?$
A. $Lithium$
B. $Sodium$
C. $Potassium$
D. $Rubidium$
3.
$Alkali metals react with dihydrogen at high temperatures to form which type of hydrides?$
A. $Covalent hydrides$
B. $Ionic hydrides$
C. $Molecular hydrides$
D. $Interstitial hydrides$
4.
$Which alkali metal hydroxide is used in the manufacture of soft soaps?$
A. $LiOH$
B. $NaOH$
C. $KOH$
D. $CsOH$
5.
$Which of the following is the correct order of the size of hydrated alkali metal ions?$
A. $Li^{+} > Na^{+} > K^{+} > Rb^{+} > Cs^{+}$
B. $Cs^{+} > Rb^{+} > K^{+} > Na^{+} > Li^{+}$
C. $Li^{+} < Na^{+} < K^{+} < Rb^{+} < Cs^{+}$
D. $Na^{+} > Li^{+} > K^{+} > Rb^{+} > Cs^{+}$
6.
$The solubility of alkali metal hydroxides in water increases down the group. This is because:$
A. $Hydration enthalpy decreases more rapidly than lattice enthalpy$
B. $Lattice enthalpy decreases more rapidly than hydration enthalpy$
C. $Both lattice and hydration enthalpies increase$
D. $The metals become more electronegative$
7.
$Which of the following alkali metal carbonates has the highest thermal stability?$
A. $Li_{2}CO_{3}$
B. $Na_{2}CO_{3}$
C. $K_{2}CO_{3}$
D. $Cs_{2}CO_{3}$
8.
$The solubility of alkali metal hydroxides in water increases down the group. What is the correct order of the solubility of these hydroxides?$
A. $LiOH < NaOH < KOH < RbOH < CsOH$
B. $CsOH < RbOH < KOH < NaOH < LiOH$
C. $LiOH < KOH < NaOH < CsOH < RbOH$
D. $NaOH < LiOH < KOH < RbOH < CsOH$
9.
$Which of the following alkali metals has the highest heat of atomization?$
A. $Lithium$
B. $Sodium$
C. $Potassium$
D. $Cesium$
10.
$An alkali metal 'M' reacts with air to give a mixture of an oxide and a nitride. When this mixture is dissolved in water, a gas with a pungent smell is evolved. The metal 'M' is:$
A. $Sodium$
B. $Lithium$
C. $Potassium$
D. $Rubidium$

Download the worksheet for s-Block Elements - Group 1: Alkali Metals to practice offline. It includes additional chapter-level practice questions.

Group 2: Alkaline Earth Metals

Subtopic

Group 2: Alkaline Earth Metals under s-Block Elements for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of the following alkaline earth metals is used to make windows for X-ray tubes?$
A. $Magnesium$
B. $Barium$
C. $Beryllium$
D. $Strontium$
2.
$Among the following, which element has the highest second ionization enthalpy?$
A. $Beryllium$
B. $Magnesium$
C. $Calcium$
D. $Strontium$
3.
$CaO$
A. $Acidic$
B. $Basic$
C. $Neutral$
D. $Amphoteric$
4.
$Alkaline earth metals are ________ reducing agents compared to alkali metals in the same period.$
A. $Stronger$
B. $Weaker$
C. $Equally strong$
D. $Non-reactive$
5.
$Which Group 2 element is used to remove the last traces of air from vacuum tubes because of its high reactivity with both Oxygen and Nitrogen?$
A. $Magnesium$
B. $Barium$
C. $Beryllium$
D. $Calcium$
6.
$In the Solvay process for the manufacture of sodium carbonate, how is Ammonia recovered?$
A. $NH_4Cl$
B. $NH_4Cl$
C. $NH_4Cl$
D. $NH_4Cl$
7.
$Ca^{2+}$
A. $HCl$
B. $K_2CrO_4$
C. $Ammonium chloride$
D. $Sodium hydroxide$
8.
$Which Group 2 element is used in the 'Parkes Process' for the desilverization of lead?$
A. $Mg$
B. $None of these (Let's replace question)$
C. $Mg$
D. $Ca$
9.
$[BeF_{4}]^{2-}$
A. $Tetrahedral$
B. $Square Planar$
C. $Octahedral$
D. $Linear$
10.
$Which property of Radium makes it significantly different from the other members of Group 2 in terms of safe handling?$
A. $Its radioactivity and decay into Radon gas.$
B. $Its extreme reactivity with Nitrogen forming a liquid nitride.$
C. $+4$
D. $Its lower boiling point than Mercury.$

Download the worksheet for s-Block Elements - Group 2: Alkaline Earth Metals to practice offline. It includes additional chapter-level practice questions.

Anomalous Properties of Lithium and Beryllium

Subtopic

Anomalous Properties of Lithium and Beryllium under s-Block Elements for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$What is the nature of the bond in Lithium alkyls and Lithium aryls?$
A. $Purely ionic$
B. $Purely metallic$
C. $Highly covalent$
D. $Coordinate bond$
2.
$Both Lithium and Magnesium chlorides are soluble in which solvent due to their covalent nature?$
A. $Water only$
B. $Ethanol$
C. $Mercury$
D. $Liquid Nitrogen$
3.
$BeO$
A. $Ionic lattice$
B. $High covalent character$
C. $Molecular structure$
D. $Weak van der Waals forces$
4.
$Which of the following Lithium salts is deliquescent?$
A. $Li_2CO_3$
B. $LiCl$
C. $LiF$
D. $Li_2C_2O_4$
5.
$BeH_2$
A. $NaBH_4$
B. $CaH_2$
C. $LiAlH_4$
D. $Hydrogen gas at high pressure$
6.
$LiNH_2$
A. $Li_3N$
B. $Li_2NH$
C. $LiH$
D. $Li_2O$
7.
$Why does Beryllium show a lower coordination number than Magnesium?$
A. $Higher electronegativity$
B. $Absence of d-orbitals in its valence shell$
C. $Larger atomic size$
D. $Presence of more valence electrons$
8.
$Which property of Lithium makes it distinct from other alkali metals during the flame test?$
A. $It gives a violet flame$
B. $It gives a crimson red flame$
C. $It does not impart any color to the flame$
D. $It gives a yellow flame$
9.
$BeSO_4 \cdot 4H_2O$
A. $2$
B. $4$
C. $6$
D. $0 (it is anhydrous)$
10.
$LiI$
A. $LiI$
B. $Li^+$
C. $I^-$
D. $Li$

Download the worksheet for s-Block Elements - Anomalous Properties of Lithium and Beryllium to practice offline. It includes additional chapter-level practice questions.

Industrial Uses of Lime and Limestone

Subtopic

Industrial Uses of Lime and Limestone under s-Block Elements for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of the following compounds is known as 'Quicklime'?$
A. $Ca(OH)_{2}$
B. $CaCO_{3}$
C. $CaO$
D. $CaCl_{2}$
2.
$Slaked lime is often added to aquarium water to:$
A. $Increase the acidity$
B. $Stabilize the pH by acting as a buffer$
C. $Provide oxygen to the fish$
D. $Remove all the salt$
3.
$Which of the following is a byproduct of the reaction between quicklime and silica in a furnace?$
A. $Carbon dioxide$
B. $Calcium silicate$
C. $Oxygen$
D. $Iron oxide$
4.
$Which gas is used in the 'Carbonation' process during sugar refining along with lime?$
A. $Oxygen$
B. $Carbon dioxide$
C. $Nitrogen$
D. $Methane$
5.
$Calcium oxide reacts with water to form calcium hydroxide. If excess water is used to form a suspension, what is the industrial term for this suspension?$
A. $Limewater$
B. $Soda lime$
C. $Milk of lime$
D. $Hydrated lime$
6.
$What is the function of the 'lime boil' in the process of scouring cotton in the textile industry?$
A. $To dye the fabric$
B. $To remove natural waxes, fats, and pectins from the fiber$
C. $To strengthen the cotton fibers$
D. $To waterproof the textile$
7.
$In the manufacture of calcium ammonium nitrate (CAN) fertilizer, limestone is used to:$
A. $Provide nitrogen to the mixture$
B. $Neutralize the acidity of ammonium nitrate and act as a filler$
C. $Reduce the solubility of the fertilizer$
D. $Increase the explosive power of the compound$
8.
$In the production of white Portland cement, which oxide impurity must be strictly minimized in the limestone and clay raw materials?$
A. $Fe_2O_3$
B. $MgO$
C. $SiO_2$
D. $Na_2O$
9.
$40^{\circ}C$
A. $The calcium hypochlorite decomposes into calcium chlorate and calcium chloride.$
B. $The chlorine gas fails to react and simply passes through the lime unabsorbed.$
C. $The slaked lime dehydrates back into quicklime, stopping the reaction.$
D. $The reaction becomes explosive due to the formation of chlorine heptoxide.$
10.
$SO_2$
A. $CaCO_3(s) + SO_2(g) + \frac{1}{2}H_2O \rightarrow CaSO_3 \cdot \frac{1}{2}H_2O(s) + CO_2(g)$
B. $CaCO_3(s) + SO_2(g) \rightarrow CaS(s) + 2O_2(g) + C$
C. $CaCO_3(s) + SO_2(g) + H_2O \rightarrow CaSO_4 \cdot H_2O(s) + CO(g)$
D. $Ca(OH)_2 + SO_2 + O_2 \rightarrow CaSO_4 + H_2O$

Download the worksheet for s-Block Elements - Industrial Uses of Lime and Limestone to practice offline. It includes additional chapter-level practice questions.

s-Block Elements

Group 1: Alkali Metals

❓Preview questions (no answers)

Group 2: Alkaline Earth Metals

❓Preview questions (no answers)

Anomalous Properties of Lithium and Beryllium

❓Preview questions (no answers)

Industrial Uses of Lime and Limestone

❓Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

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