p-Block Elements PYQs Set 9 (PDF)

Set 9 of 15 · Questions 241-270 of 423

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Mere Teacher · Previous Year Questions JEE Main Chemistry · p-Block Elements · Set 9 (Q241-270)
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241. $Match List-I with List-II. List-I Reaction (A) 4 N H_{3} (g) + 5 O_{2} (g) \to 4NO(g) + 6 H_{2} O(g) (B) N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g) (C) C_{12} H_{22} O_{11} (aq) + H_{2} O(l) \to C_{6} H_{12} 0_{6} (Glucose) + C_{6} H_{12} O_{6} (Fructose) (D) 2 S O_{2} (g) + O_{2} (g) \to 2 S O_{3} (g) List-II Catalyst (I) NO(g) (II) H_{2} S O_{4} (l) (III) Pt(s) (IV) Fe(s) Choose the correct answer from the options given below :$ (1) $(A) - (II), (B) - (III), (C) - (I), (D) - (IV)$ (2) $(A) - (III), (B) - (II), (C) - (I), (D) - (IV)$ (3) $(A) - (III), (B) - (IV), (C) - (II), (D) - (I)$ (4) $(A) - (III), (B) - (II), (C) - (IV), (D) - (I)$ 242. $Bleaching powder is obtained by the action of chlorine gas and$ (1) $dilute solution of C a (O H)_{2}$ (2) $concentrated solution of C a (O H)_{2}$ (3) $dry C a O$ (4) $dry slaked lime.$ 243. $Match List -1 with List - II. List -I (Processes/Reactions) (A) 2 S O_{2} (g)+ O_{2} (g) \to 2 S O_{3} (g) (B) 4 N H_{3} (g)+ 5 O_{2} (g) \to 4NO(g)+ 6 H_{2} O(g) (C) N_{2} (g)+ 3 H_{2} (g) \to 2 N H_{3} (g) (D) Vegetable oil(l)+H_{2} \to Vegetable ghee(s) List - II (Catalyst) (I) Fe(s) (II) Pt(s)-Rh(s) (III) V_{2} O_{5} (IV) Ni(s) Choose the correct answer from the options given$ (1) $(A) - (III), (B) - (I), (C) - (II), (D) - (IV)$ (2) $(A) - (III), (B) - (II), (C) - (I), (D) - (IV)$ (3) $(A) - (IV), (B) - (III), (C) - (I), (D) - (II)$ (4) $(A) - (IV), (B) - (II), (C) - (III), (D) - (I)$ 244. $Boric acid is an acid because its molecule$ (1) $contains replaceable H^{+} ion$ (2) $gives up a proton$ (3) $accepts O H^{-} from water releasing proton$ (4) $combines with proton from water molecule.$ 245. $A l F_{3} is soluble in HF only in presence of K F . It is due to the formation of$ (1) $K_{3} [A l F H]$ (2) $K_{3} [A l F_{6}]$ (3) $A l H_{3}$ (4) $K [A l F_{3} H$ 246. $Structures of B e C l_{2} in solid state, vapour phase and at very high temperature respectively are:$ (1) $Monomeric, Dimeric, Polymeric$ (2) $Dimeric, Polymeric, Monomeric$ (3) $Polymeric, Monomeric, Dimeric$ (4) $Polymeric, Dimeric, Monomeric$ 247. $Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom. Reason R: A molecule with 2 chiral carbons is always optically active. In the light of above statements, chose the correct answer from the options given below:$ (1) $A is true but R is false$ (2) $Both A and R are true but R is the correct explanation of A$ (3) $A is false but R is true$ (4) $Both A and R are true but R is NOT the correct explanation of A$ 248. $The tendency of B F_{3}, B C l_{3} and B B r_{3} to behave as Lewis acid decreases in the sequence$ (1) $B C l_{3} > B F_{3} > B B r_{3}$ (2) $B B r_{3} > B C l_{3} > B F_{3}$ (3) $B B r_{3} > B F_{3} > B C l_{3}$ (4) $B F_{3} > B C l_{3} > B B r_{3}$ 249. $H_{3} P O_{2} is the molecular formula of an acid of phosphorus. Its name and basicity respectively are$ (1) $phosphorous acid and two$ (2) $hypophosphorous acid and two$ (3) $hypophosphorous acid and one$ (4) $hypophosphoric acid and two.$ 250. $The angular shape of ozone molecule (O3) consists of$ (1) $1 sigma and 1 π bond$ (2) $2 sigma and 1 π bond$ (3) $1 sigma and 2 π bond$ (4) $3 sigma and 1 π bond$ 251. $The bleaching action of chlorine is due to$ (1) $reduction$ (2) $hydrogenation$ (3) $chlorination$ (4) $oxidation.$ 252. $The correct statement about ICl_{5} and ICl_{4}^{-} is:$ (1) $both are is isostructural.$ (2) $ICl_{5} is trigonal bipyramidal and ICl_{4}^{-} is tetrahedral.$ (3) $ICl_{5} is square pyramidal and ICl_{4}^{-} is tetrahedral.$ (4) $ICl_{5} is square pyramidal and ICl_{4}^{-} is square planar$ 253. $Nitrogen is relatively inactive element because$ (1) $its atom has a stable electronic configuration$ (2) $it has low atomic radius$ (3) $its electronegativity is fairly high$ (4) $dissociation energy of its molecule is fairly high.$ 254. $In a molecule of pyrophosphoric acid, the number P - OH, P = O and P - O - P bonds/moiety (ies) respectively are$ (1) $4, 2 and 0$ (2) $4, 2 and 1$ (3) $3, 3 and 3$ (4) $2, 4 and 1$ 255. $Match List I with List II List I Oxide (A) N_{2} O_{4} (B) NO (C) N_{2} O_{5} (D) N_{2} O List II Type of bond (I) 1N = O bond (II) 1N - O -N bond (III) 1N- N bond (IV) 1N = N/N = N bond Choose the correct answer from the options given below :$ (1) $A - III, B - I, C - II, D - IV$ (2) $A - II, B - IV, C - III, D - I$ (3) $A - III, B - I, C - IV, D - II$ (4) $A - II, B - I, C - III, D - IV$ 256. $Given below are two statements: Statement I: The N - N single bond is weaker and longer than that of P-P single bond. Statement II: Compounds of group 15 elements in +3 oxidation states readily undergo disproportionation reactions. In the light of the above statements, choose the correct answer from the options given below$ (1) $Statement I is false but Statement II is true$ (2) $Both Statement I and Statement II are true$ (3) $Both Statement I and Statement II are false$ (4) $Statement I is true but Statement II is false$ 257. $Identify the correct statement for B_{2} H_{6} from those given below (A) In B_{2} H_{6}, all B-H bonds are equivalent. (B) In B_{2} H_{6} there are four 3-centre-2-electron bonds. (C) B_{2} H_{6} is a Lewis acid. (D) B_{2} H_{6} can be synthesized form both B F_{3} and N a B H_{4} . (E) B_{2} H_{6} is a planar molecule. Choose the most appropriate answer from the options given below :$ (1) $(A) and (E) only$ (2) $(B), (C) and (E) only$ (3) $(C) and (D) only$ (4) $(C) and (E) only$ 258. $The incorrect statement from the following for borazine is:$ (1) $It contains banana bonds$ (2) $It can react with water$ (3) $It is a cyclic compound$ (4) $It has electronic delocalization$ 259. $Elements ofwhich ofthe following groups will form anions most readily?$ (1) $Oxygen family$ (2) $Nitrogen family$ (3) $Halogens$ (4) $Alkali metals$ 260. $Which of the following species has four lone pairs of electrons?$ (1) $I$ (2) $O$ (3) $C l^{-}$ (4) $He$ 261. $The reaction of concentrated sulphuric acid with carbohydrates (C_{12} H_{22} O_{11}) is an example of$ (1) $Oxidation$ (2) $Reduction$ (3) $Sulphonation$ (4) $Dehydration$ 262. $One mole of P_{4} reacts with 8 moles of SOC l_{2} to give 4 moles of A, x mole of S O_{2} and 2 moles of B. A, B and x respectively are$ (1) $POC l_{3}, S_{2} C l_{2} and 2$ (2) $PC l_{3}, S_{2} C l_{2} and 4$ (3) $PC l_{3}, S_{2} C l_{2} and 2$ (4) $POC l_{3}, S_{2} C l_{2} and 4$ 263. $Among the following which is the strongest. oxidising agent?$ (1) $B r_{2}$ (2) $I_{2}$ (3) $C l_{2}$ (4) $F_{2}$ 264. $The correct order of catenation is:$ (1) $C > Sn > Si \approx Ge$ (2) $C > Si > Ge \approx Sn$ (3) $Si > Sn > C > Ge$ (4) $Ge > Sn > Si > C$ 265. $The C - C bond length is maximum in:$ (1) $graphite$ (2) $C_{70}$ (3) $C_{60}$ (4) $diamond$ 266. $Given below are two statements: Statement I: Elements ' X^{’} and ' Y' are the most and least electronegative elements, respectively among N, As, Sb and P. The nature of the oxides X_{2} O_{3} and Y_{2} O_{3} is acidic and amphoteric, respectively. Statement II: BCl_{3} is covalent in nature and gets hydrolysed in water. It produces (B (OH)_{4})^{-} and (B (H_{2} O)_{6})^{3 +} in aqueous medium. In the light of the above statements, choose the correct answer from the options given below :$ (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) $Statement I is false but Statement II is true$ 267. $Given below are two statements : Statement I: The number of pairs among (SiO_{2}, CO_{2}), (SnO, SnO_{2}), (PbO, PbO_{2}) and (GeO, GeO_{2}), which contain oxides that are both amphoteric is 2 . Statement II: BF_{3} is an electron deficient molecule, can act as a Lewis acid, forms adduct with NH_{3} and has a trigonal planar geometry. In the light of the above statements, choose the correct answer from the options given below:$ (1) $Statement I is true but Statement II is false$ (2) $Both Statement I and Statement II are true$ (3) $Both Statement I and Statement II are false$ (4) $Statement I is false but Statement II is true$ 268. $Wilkinson catalyst is:$ (1) $((Ph_{3} P)_{3} IrCl)$ (2) $((Et_{3} P)_{3} RhCl)$ (3) $((Ph_{3} P)_{3} RhCl)$ (4) $((Et_{3} P)_{3} IrCl)$ 269. $Which of the following is not true ?$ (1) $Among halide ions, iodide ion is the most powerful reducing agent$ (2) $Fluorine is the only halogen which does not show a variable oxidation state$ (3) $HOCl is a stronger acid than HOBr$ (4) $HF is a stronger acid than HCl$ 270. $The number of Cl = O bonds in perchloric acid is,$