The s-Block Elements MCQ Class 11 Chemistry
Please refer to Chapter 10 The s-Block Elements MCQ Class 11 Chemistry with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 11 Chemistry. Students should refer to MCQ Questions for Class 11 Chemistry with Answers to score more marks in Grade 11 Chemistry exams. Students should read the chapter The s-Block Elements and then attempt the following objective questions.
MCQ Questions Class 11 Chemistry Chapter 10 The s-Block Elements
The The s-Block Elements MCQ Class 11 Chemistry provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.
Question. Sodium carbonate is manufactured by
(b) Solvay process
(d) transmission process
Question. In the reaction, NaOH + S → x + Na2S + H2O, x is
Question. Which property of Na2S2O3 makes it useful in photography?
(a) Photochemical property
(b) Complex formation property
(c) Oxidising agent
(d) Reducing agent
Question. Which one of the following is true?
(a) NaOH is used in the concentration of bauxite ore
(b) NaOH is a primary standard in volumetric analysis
(c) Manganous hydroxide is soluble in excess of NaOH solution
(d) NaOH solution does not react with Cl
Question. Which one of the following on hydrolysis, gives the cotTesponding metallic hydroxide, H2O2 and O2 ?
Question. Which of the following properties oflithium does not show diagonal relationship with magnesium?
(a) Formation of Li+ ion
(b) Formation of Li3N
(c) Solubility of LiHCO3
(d) Thermal decomposition of Li2CO3
Question. Which of the following statements are correct for alkali metal compounds?
I. Superoxides are paramagnetic in nanrre.
II. The basic strength of hydroxides increases the group.
III. The conductivity of chlorides in their aqueous solutions decreases down the group.
IV. The basic nanrre of carbonates in aqueous solutions is due to cationic hydrolysis.
(a) I, II, and III
(b) I and II
(c) II, III and IV
(d) III and IV
Question. The most electropositive element in alkali metals, is
Question. The reaction between sodium and water can be made less vigorous by
(a) adding a little alcohol
(b) amalgamating sodium
(c) adding a little acetic acid
(d) lowering the temperature
Question. Sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of
(c) Na2O and O3
(d) NaOH and Na2CO3
Question. Which of the following dissolves in hot cone. NaOH solution?
Question. The ionic conductance is least for
Question. KI and CuSO4 solution when mixed, give
(a) Cul2 + K2SO4
(b) Cu2l2 + K2SO4
(c) K2SO4 + Cu2l2 + l2
(d) K2SO4 + Cul2 + l2
Question. Among the alkali metals caesium is the most reactive because
(a) its incomplete shell is nearest to the nucleus
(b) it has a single electron in the valence shell
(c) it is the heaviest alkali metal
(d) the outem1ost electron is more loosely bound than the outermost electron of the other alkali metals
Question. Baking powder contains
(a) NaHCO3 , Ca(H2PO2)2 and starch
(b) NaHCO3 , Ca(H2PO2)2
(c) NaHCO3 and starch
Question. CaCI2 is used as
(b) desiccating agent
(d) None of these
Question. The chemical formula of plaster of Paris is
(a) CaSO4 · 1/2 H2O
(b) CaSO4 · H2O
(c) CaSO4 · 2H2OP
(d) CaSO4 · 3H2O
Question. The starting material used in Solvay’s process is
(a) sodium sulphate
(b) brine solution
(d) All of these
Question. In Down’s method for the extraction of sodium, the melting point of the electrolyte is lowered by adding
(a) potassium chloride
(b) calcium chloride
(c) both calcium chloride and potassium fluoride
(d) potassium fluoride only
Question. The carbonate that will not decompose on heating is
Question. The solubility of alkali metal hydroxide is
(a) LiOH < KOH < NaOH < RbOH < CsOH
(b) LiOH < NaOH < KOH < RbOH < CsOH
(c) CsOH < RbOH < KOH < NaOH < LiOH
(d) None of the above
Question. Shine at freshly cut sodium is because of
(a) due to oscillation of free electrons
(b) due to weak metallic bonding
(c) due to absorption of light in crystal lattice
(d) due to presence of free valency at the surface
Question. When Na reacts with liquid NH3 the following substance is formed
(a) [Na (NH3)x]–
(d) Nax (NH3)y
Question. Pick out the statement (s) which is/are not correct about the diagonal relationship of Li and Mg.
I. Polarising powers of Li+ and Mg2+ are almost same.
II. Like Li, Mg decomposes water very fast.
III. LiCI and MgCl2 are deliquescent.
IV. Like Li, Mg does not form solid bicarbonates.
(a) I and II
(b) II and III
(c) Only II
(d) Only I
Question. Which of the following exists in polymeric form ?
Question. What are the metal ions present in camallite?
(a) Mg, K
(b) Al, Na
(c) Na, Mg
(d) Zn, Mg
Question. The decomposition temperature is maximum for
Question. The main product obtained when a solution of sodium carbonate reacts with mercuric chloride is
(c) Hg CO3
(b) Hg CO3 ·HgO
(d) Hg CO3 ·Hg (OH)2
Question. Which of the following reactions does not liberate gaseous product?
(a) AlCl3 + NaOH →
(b) NaOH + P (white)+ H2O →
(c) Al + NaOH →
(d) Zn + NaOH →
Question. The fommla of the product formed, when sodium thiosulphate solution is added to silver bromide is
(d) Ag3[Na (S2O3)2]
Question. KO2 is used in space and submarines because it
(a) absorbs CO2 and increases O2 concentration
(b) absorbs moisture
(c) absorbs CO2
(d) produces ozone
Question. The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is
Question. Usually, CaCI2 is preferred over NaCl for cleaning snow on roads particulary in very cold countries. This is because
(a) NaCl makes the road slippery but CaCI2 does not
(b) CaCI2 is hygroscopic but NaCl is not
(c) CaCI2 is less soluble in H2 Othan NaCl
(d) eutectic mixture of CaCI2 /H2O freezes at – 55°C while that of NaCI/H2O freezes at-18° C
Question. Baking powder is more commonly used to make cakes or bread ‘rise’. FiHer in baking powder is
(b) Ca (H2PO4)2
Question. Which pair is different from the others?
Question. The activity of alkaline earth metals as reducing agent
(a) decreases from Be to Ba
(b) increases from Be to Ba
(c) increases from Be to Ca and decreases from Ca to Ba
(d) decreases from Be to Ca and increases from Ca to Ba
Question. The species that is not hydrolysed in water is
Question. Which of the following represents the composition of camallite mineral?
(a) K2O· Al2O3 · 6SiO2
(c) K2SO4 ·MgSO4 ·MgCI2 ·6H2O
(d) KCl-MgCI2 ·6H2O
Question. In which of the following reaction, MgO is not formed?
(a) Mg + CO2 →
(b) Mg + diI. HNO3 →
(c) Mg + NO →Δ
(d) Mg + B2O3 →
Question. Which of the following substances has the highest melting point?
Question. Which of the following on thermal decomposition yields basic as well as acidic oxide?
Question. In the presence of cobalt chloride, bleaching powder decomposes to form
(a) CaCO3 and O3
(c) CI2O and CaO
(b) ClO2 and CaO
(d) CaCI2 and O2
Question. A metal Mforms water soluble MSO4 and inert MO. MO in aqueous solution forms insoluble M(OH)2 soluble in NaOH. Metal M is
Question. Out of following which compound is used for preservation of wood?
Question. Which of the following pairs of substances would give same gaseous product in reaction with water?
(a) Na and Na2O2
(b) Ca and CaH2
(c) Ca and Cao
(d) Ba and BaO2
(e) Ca and CaC2
Question. Which of the following carbonates decomposes at lowest temperature?
Question. Which pair of the following chlorides does not impart colour to the flame ?
(a) BeCI2 and CrCI2
(b) BeCI2 and MgCI2
(c) CaCI2 and BaCI2
(d) BaCI2 and SrCI2
Question. The solubilities of carbonates decrease down the magnesium group due to decrease in
(a) lattice energies of solids
(b) hydration energies of cations
(c) interionic attraction
(d) entropy of solution formation
Question. The substance used in Holme’s signal of the ship is a mixture of
(a) CaC2 + Ca3P2
(b) Ca3 (PO4 )2 + Pb3O4
(c) H3PO4 + CaCl2
(d) NH3 + HOCl
Question. In curing cement plasters water is sprinkled from time to time. This helps in
(a) keeping it cool
(b) developing interlocking needle-like crystals of hydrated silicates
(c) hydrating sand and gravel mixed with cement
(d) converting sand into silicic acid
Question. Which one of the following substances is used in the laboratory for a fast drying of neutral gases?
(a) Phosphorus pentoxide
(b) Active charcoal
(c) Anhydrous calcium chloride
Question. Setting of plaster of Paris involves
(a) oxidation with atmospheric oxygen
(b) combination with atmospheric CO2
(d) hydration to yield another hydrate
Question. A compound X on heating gives a colourless gas. This residue is dissolved in water to obtain Y. Excess CO2 is bubbled through aqueous solution of Y when Z is formed. Z on gentle heating gives back X. The Xis
(b) Ca (HCO3)2
Question. Milk of magnesia is used as
(d) food preservative
Question. Ionic compound BaSO4 is insoluble in water due to
(a) high lattice energy
(b) low lattice energy
(c) low hydration energy
(d) Both (b) and (c)
Question. The substance not likely to contain CaCO3 is
(a) a marble statue
(b) calcined gypsum
(c) sea shells
Question. Which of the following hydroxides is amphoteric in nature?
(b) Mg (OH)2
(d) Ba (OH)2
Question. Mixture of MgCI2 and MgO is called
(a) Portland cement
(b) Sorel’s cement
(c) double salt
(d) None of these
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