S-Block Elements MCQs

Option A: Triggers hydration

Option B: Triggers hydrolysis

Option C: Prevents rapid hardening

Option D: all of the above

Correct Answer: Prevents rapid hardening ✔

Option A: Na

Option B: Cr

Option C: Li

Option D: K

Correct Answer: Li ✔

Option A: being s-block elements

Option B: inert gas configurations

Option C: ns1 electronic configuration

Option D: being metals

Correct Answer: inert gas configurations ✔

Option A: N2

Option B: O2

Option C: N2 and O2

Option D: Ne

Correct Answer: Ne ✔

Option A: high first ionization potential

Option B: high second ioniation potential

Option C: high ionic radius

Option D: high electronegativity

Correct Answer: high second ioniation potential ✔

Option A: Sodium and Lithium

Option B: Lithium and magnesium

Option C: Lithium and beryllium

Option D: Boron and Beryllium

Correct Answer: Lithium and magnesium ✔

Option A: Lithium

Option B: Sodium

Option C: Potassium

Option D: Rubidium

Correct Answer: Lithium ✔

Option A: Ca and P

Option B: S and P

Option C: Ca and S

Option D: we could not apply

Correct Answer: Ca and S ✔

Option A: Water

Option B: HCI

Option C: Na+

Option D: NaCl

Correct Answer: Water ✔

Option A: Na2CO3

Option B: K2CO3

Option C: (NH4)2CO3

Option D: CaCO3

Correct Answer: CaCO3 ✔

Option A: Graphite

Option B: Copper

Option C: Molten sodium chloride

Option D: Mercury

Correct Answer: Molten sodium chloride ✔

Option A: Gypsum

Option B: Dolomite

Option C: Calcite

Option D: Plaster of Paris

Correct Answer: Gypsum ✔

Option A: Sodium sulphate

Option B: Potassium sulphate

Option C: Zinc sulphate

Option D: Barium sulphate

Correct Answer: Barium sulphate ✔

Option A: Na K

Option B: Mg Ca

Option C: Li Na

Option D: Li Ca

Correct Answer: Li Na ✔

Option A: Si

Option B: Ba

Option C: Mg

Option D: Ca

Correct Answer: Ca ✔

Option A: Base

Option B: Basic salt

Option C: Ashes

Option D: Spirit

Correct Answer: Ashes ✔

Option A: LiOH

Option B: NaOH

Option C: KOH

Option D: CsOH

Correct Answer: LiOH ✔

Option A: Na2CO3

Option B: Na2CO3.10H2O

Option C: Na2CO3.H2O

Option D: NaHCO3

Correct Answer: Na2CO3 ✔

Option A: A1+3

Option B: Cs+

Option C: Ba+

Option D: Mg+2

Correct Answer: A1+3 ✔

Option A: sodium

Option B: hydrogen

Option C: chlorine

Option D: oxygen

Correct Answer: oxygen ✔

Option A: KCI

Option B: KCI.MgCl2.6H2O

Option C: Na2B4O7.10H2O

Option D: CaCO3.MgCO3

Correct Answer: KCI ✔

Option A: It corrodes the organic tissues

Option B: It is used in soda water

Option C: It reacts with chlorine gas

Option D: It reacts with fats to form soap

Correct Answer: It corrodes the organic tissues ✔

Option A: They are more reactive

Option B: They have greater atomic radii

Option C: They have smaller atomic sizes

Option D: All

Correct Answer: They have smaller atomic sizes ✔

Option A: Smaller electronegativity of alkali metals

Option B: Smaller ionic radius of these metals

Option C: De-excitation of electrons from higher energy levels to low energy level

Option D: Excitation of electrons from low energy levels to higher energy levels

Correct Answer: De-excitation of electrons from higher energy levels to low energy level ✔

Option A: Hydroxide ions to reach anode

Option B: Chlorine gas to mix

Option C: Cathode to decay

Option D: All of the above

Correct Answer: Hydroxide ions to reach anode ✔

Option A: Absorbs moisture and remains solid

Option B: Absorbs moisture and turns to liquid form

Option C: Loses water of crystallization

Option D: Increases the number of water of crystallization

Correct Answer: Absorbs moisture and turns to liquid form ✔

Option A: NaHCO3

Option B: NaNO3

Option C: Na2CO3

Option D: Na2CrO4

Correct Answer: Na2CO3 ✔

Option A: Lose water and remain solid

Option B: Gain water and remain solid

Option C: Gain water and become liquid

Option D: Remains unchanged

Correct Answer: Lose water and remain solid ✔

Option A: Water

Option B: NaCl

Option C: Aqueous sodium hydroxide

Option D: H2SO4

Correct Answer: Aqueous sodium hydroxide ✔

Option A: Sodium carbonate

Option B: Sodium bicarbonate

Option C: Sodium metal

Option D: Sodium hydroxide

Correct Answer: Sodium metal ✔

Option A: Ca

Option B: Cr

Option C: Both of the above

Option D: None of the above

Correct Answer: None of the above ✔

Option A: Francium

Option B: Caesium

Option C: Rubidium

Option D: Radium

Correct Answer: Radium ✔

Option A: Low electronegativity

Option B: Low electropositivity

Option C: Low charge density

Option D: Not known yet

Correct Answer: Low electropositivity ✔

Option A: small size

Option B: high charge density

Option C: less electropositivity

Option D: all of the above

Correct Answer: all of the above ✔

Option A: Acidic

Option B: Basic

Option C: Amphoteric

Option D: Neutral

Correct Answer: Amphoteric ✔

Option A: NaNO3

Option B: CaCO3

Option C: Ba (NO3)2

Option D: NH4Cl

Correct Answer: NaNO3 ✔

Option A: Their oxides are basic

Option B: Their oxide and hydroxides are water soluble

Option C: Both A & B

Option D: They are found in earth

Correct Answer: Both A & B ✔