p-Block Elements PYQs Set 7 (PDF)

Set 7 of 15 · Questions 181-210 of 423

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Mere Teacher · Previous Year Questions JEE Main Chemistry · p-Block Elements · Set 7 (Q181-210)
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181. $N a^{+}, M g^{2 +}, A 1^{3 +} and S i^{4 +} are isoelectronic, their ionic size will follow the order$ (1) $N a^{+} > M g^{2 +} < A l^{3 +} < S i^{4 +}$ (2) $N a^{+} < M g^{2 +} < A l^{3 +} < S i^{4 +}$ (3) $N a^{+} > M g^{2 +} > A l^{3 +} > S i^{4 +}$ (4) $N a^{+} ⟨ M g^{2 +} ⟩ A l^{3 +} < S i^{4 +}$ 182. $Given below are two statements: Statement I : The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases. Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions. Choose the correct answer from the options given below.$ (1) $Both statement I and Statement II are true$ (2) $Both statement I and Statement II are false$ (3) $Statement I is true but Statement II is false$ (4) $Statement I is false but Statement II is true$ 183. $The main oxides formed on combustion of Li, Na and K in excess of air are, respectively:$ (1) $L i O_{2}, N a_{2} O_{2} and K_{2} O$ (2) $L i_{2} O_{2}, N a_{2} O_{2} and K O_{2}$ (3) $L i_{2} O, N a_{2} O_{2} and K O_{2}$ (4) $L i_{2} O, N a_{2} O and K O_{2}$ 184. $The correct order of N-compounds in its decreasing order of oxidation states is$ (1) $H N O_{3}, NO, N_{2}, N H_{4} Cl$ (2) $N H_{4} Cl, N_{2}, NO, H N O_{3}$ (3) $H N O_{3}, N H_{4} Cl, NO, N_{2}$ (4) $H N O_{3}, NO, N H_{4} Cl, N_{2}$ 185. $Which of the following statements is not true for halogens ?$ (1) $All form monobasic oxyacids$ (2) $Chlorine has the highest electron gain enthalpy$ (3) $All but except fluorine show positive oxidation states$ (4) $All are oxidizing agents$ 186. $Which of the following statements about H_{3} B O_{3} is not correct?$ (1) $It has a layer structure in which planar B O_{3} units are joined by hydrogen bonds.$ (2) $It does not act as proton donor but acts as a Lewis acid by accepting hydroxyl ion.$ (3) $It is a strong tribasic acid.$ (4) $It is prepared by acidifying an aqueous solution of borax.$ 187. $Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. (B < Al), (Al < Ga), (Ga < In) and (In < Tl) Identify the elements present in the incorrect pair and in that pair find out the element (X) that has higher ionic radius (M^{3 +}) than the other one. The atomic number of the element (X) is$ (1) $49$ (2) $81$ (3) $31$ (4) $13$ 188. $Regarding the hydrides of group 15 elements EH_{3} (E = N, P, As, Sb), select the correct statement from the following:(A) The stability of hydrides decreases down the group.(B) The basicity of hydrides decreases down the group.(C) The reducing character increases down the group.(D) The boiling point increases down the group. Choose the correct answer from the options given below:$ (1) $B & C only$ (2) $A, B, C & D$ (3) $A & D only$ (4) $A, B & C only$ 189. $Which of the following has the highest dipole moment?$ (1) $S b H_{3}$ (2) $A s H_{3}$ (3) $N H_{3}$ (4) $P H_{3}$ 190. $Which of the following oxide is amphoteric in nature?$ (1) $SiO_{2}$ (2) $GeO_{2}$ (3) $CO_{2}$ (4) $SnO_{2}$ 191. $Given below are two statements : Statement (I) : SiO_{2} and GeO_{2} are acidic while SnO and PbO are amphoteric in nature. Statement (II) : Allotropic forms of carbon are due to property of catenation and p π - d π bond formation. In the light of the above statements, choose the most appropriate answer from the options given below:$ (1) $Both Statement I and Statement II are false$ (2) $Both Statement I and Statement II are true$ (3) $Statement I is true but Statement II is false$ (4) $Statement I is false but Statement II is true$ 192. $Number of electron deficient molecules among the following P H_{3}, B_{2} H_{6}, C C 1_{4}, N H_{3}, LiH and B C 1_{3} is$ (1) $0$ (2) $1$ (3) $2$ (4) $3$ 193. $Which of the following is incorrect statement?$ (1) $PbF_{4} is covalent in nature$ (2) $SiCl_{4} is easily hydrolysed$ (3) $GeX_{4} (X = F, Cl, Br, I) is more stable than GeX_{2}$ (4) $SnF_{4} is ionic in nature$ 194. $Which of the following is not correct about carbon monoxide?$ (1) $It reduces oxygen carrying ability of blood.$ (2) $The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.$ (3) $It is produced due to incomplete combustion.$ (4) $It forms carboxyhaemoglobin.$ 195. $Among K, Ca, Fe and Zn, the element which can form more than one binary compound with chlorine is$ (1) $Fe$ (2) $Zn$ (3) $K$ (4) $Ca$ 196. $Which pair of oxides is acidic in nature?$ (1) $N_{2} O, BaO$ (2) $CaO, SiO_{2}$ (3) $B_{2} O_{3}, CaO$ (4) $B_{2} O_{3}, Si O_{2}$ 197. $In the manufacture of bromine from sea water, the mother liquor containing bromides is treated with$ (1) $carbon dioxide$ (2) $chlorine$ (3) $iodine$ (4) $sulphur dioxide.$ 198. $Match the following: Column-I (A) Pure nitrogen (B) Haber process (C) Contact process (D) Deacon’s process Column-II (I) Chlorine (II) Sulphuric Acid (III) Ammonia (IV) Sodium azide or Barium azide Which of the following is the Correct option?$ (1) $(A)-(I); (B)-(II); (C)-(III); (D)-(IV)$ (2) $(A)-(II); (B)-(IV); (C)-(I); (D)-(III)$ (3) $(A)-(III); (B)-(IV); (C)-(II); (D)-(I)$ (4) $(A)-(IV); (B)-(III); (C)-(II); (D)-(I)$ 199. $The maximum covalency of a non-metallic group 15 element ' E ' with weakest E - E bond is:$ (1) $4$ (2) $6$ (3) $3$ (4) $5$ 200. $Give below are two statements: Statement-I : Noble gases have very high boiling points. Statement-II: Noble gases are monoatomic gases. They are held together by strong dispersion forces. Because of this they are liquefied at very low temperature. Hence, they have very high boiling points. In the light of the above statements. choose the correct answer from the options given below:$ (1) $Statement I is false but Statement II is true.$ (2) $Both Statement I and Statement II are true.$ (3) $Statement I is true but Statement II is false.$ (4) $Both Statement I and Statement II are false.$ 201. $Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements. Reason (R) : Solid Boron has very strong crystalline lattice.In the light of the above statements, choose the most appropriate answer from the options given below ;$ (1) $Both (A) and (R) are correct but (R) Is not the correct explanation of (A)$ (2) $Both (A) and (R) are correct and (R) is the correct explanation of (A)$ (3) $(A) is true but (R) is false$ (4) $(A) is false but (R) is true$ 202. $Reaction of an inorganic sulphite X with dilute H_{2} S O_{4} generates compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z. Y and Z, respectively, are :$ (1) $S and N a_{2} S O_{3}$ (2) $S O_{2} and NaHS O_{3}$ (3) $S O_{2} and N a_{2} S O_{3}$ (4) $S O_{3} and NaHS O_{3}$ 203. $Acidity of diprotic acids in aqueous solutions increases in the order$ (1) $H_{2} S < H_{2} S e < H_{2} T e$ (2) $H_{2} S e < H_{2} S < H_{2} T e$ (3) $H_{2} T e < H_{2} S < H_{2} S e$ (4) $H_{2} S e < H_{2} T e < H_{2} S$ 204. $Which of the following orders is not in accordance with the property stated against it ?$ (1) $F2 > Cl2 > Br2 > I2 ; bond dissociation energy$ (2) $F2 > Cl2 > Br2 > I2; oxidising power$ (3) $HI > HBr > HCl > HF; acidic property in water$ (4) $F2 > Cl2 > Br2 > I2; electronegativity$ 205. $The number of naturally occurring p -block elements that are diamagnetic is$ (1) $18$ (2) $6$ (3) $5$ (4) $7$ 206. $The stability of + 1 oxidation state among Al, Ga, In and Tl increases in the sequence$ (1) $Al < G a < I n < T l$ (2) $Tl < I n < G a < A l$ (3) $In < T 1 < G a < A 1$ (4) $Ga < In < A 1 < T 1$ 207. $Give below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of Ga, In and T 1 is Ga < In < T 1 . Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below:$ (1) $A is true but R is false.$ (2) $A is false but R is true.$ (3) $Both A and R are true and R is the correct explanation of A .$ (4) $Both A and R are true but R is NOT the correct explanation of A .$ 208. $About 20 km above the earth, there is an ozone layer. Which one of the following statements about ozone and ozone layer is true?$ (1) $It is beneficial to us as it stops U.V radiation.$ (2) $Conversion of O_{3} to O_{2} is an endothermic reaction.$ (3) $Ozone has a triatomic linear molecule.$ (4) $It is harmful as it stops useful radiation.$ 209. $The difference in the oxidation state of Xe between the oxidised product of Xe formed on complete hydrolysis of X e F_{4} and X e F_{4} is$ 210. $Number of oxygen atoms present in chemical formula of fuming sulphuric acid is$