p-Block Elements PYQs Set 12 (PDF)

Set 12 of 15 · Questions 331-360 of 423

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Mere Teacher · Previous Year Questions JEE Main Chemistry · p-Block Elements · Set 12 (Q331-360)
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331. $Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?$ (1) $Is soluble in water.$ (2) $Is used as a food preservative.$ (3) $Forms ‘acid‐rain’.$ (4) $Is a reducing agent$ 332. $Aqueous solution of which of the following boron compounds will be strongly basic in nature?$ (1) $N a B H_{4}$ (2) $L i B H_{4}$ (3) $B_{2} H_{6}$ (4) $N a_{2} B_{4} O_{7}$ 333. $Choose the correct statements from the following A. All group 16 elements form oxides of general formula EO_{2} and EO_{3} where E = S, Se, Te and Po . Both the types of oxides are acidic in nature. B. TeO_{2} is an oxidising agent while SO_{2} is reducing in nature. C. The reducing property decreases from H_{2} S to H_{2} Te down the group. D. The ozone molecule contains five lone pairs of electrons. Choose the correct answer from the options given below:$ (1) $A and D only$ (2) $B and C only$ (3) $C and D only$ (4) $A and B only$ 334. $Basicity of orthophosphoric acid is$ (1) $2$ (2) $3$ (3) $4$ (4) $5$ 335. $The gases respectively absorbed by alkaline pyrogallol and oil of cinnamon are$ (1) $O_{3}, C H_{4}$ (2) $O_{2}, O_{3}$ (3) $S O_{2}, C H_{4}$ (4) $N_{2} O, O_{3} .$ 336. $When copper is heated with conc. H N O_{3} it produces$ (1) $C u (N O_{3})_{2}, N O and N O_{2}$ (2) $C u (N O_{3})_{2} and N_{2} O$ (3) $C u (N O_{3})_{2} and N O_{2}$ (4) $C u (N O_{3})_{2} and NO$ 337. $The straight chain polymer is formed by$ (1) $hydrolysis of C H_{3} S i C l_{3} followed by condensation polymerisation$ (2) $hydrolysis of by addition polymerisation$ (3) $hydrolysis of (C H_{3})_{2} S i C l_{2} followed by condensation polymerisation$ (4) $hydrolysis of followed by condensation polymerisation.$ 338. $The oxidation number of sulphur in S8, S2F2, H2S respectively are :$ (1) $0, + 1 and - 2$ (2) $+ 2, + 1 and - 2$ (3) $0, + 1 and + 2$ (4) $- 2, + 1 and - 2$ 339. $The acid that is believed to be mainly responsible for the damage of Taj Mahal is$ (1) $Sulfuric acid$ (2) $Hydrofluoric acid$ (3) $Phosphoric acid$ (4) $Hydrochloric acid$ 340. $In K O_{2}, the nature of oxygen species and the oxidation state of oxygen atom are, respectively :$ (1) $Oxide and -2$ (2) $Superoxide and -1/2$ (3) $Peroxide and -1/2$ (4) $Superoxide and -1$ 341. $Concentrated H N O_{3} reacts with Iodine to give$ (1) $HI, N O_{2} and H_{2} O$ (2) $H I O_{2}, N_{2} O and H_{2} O$ (3) $H I O_{3}, N O_{2} and H_{2} O$ (4) $H I O_{4}, N_{2} O and H_{2} O$ 342. $Which of the following oxoacids of phosphorus has strongest reducing property ?$ (1) $H_{4} P_{2} O_{7}$ (2) $H_{3} P O_{3}$ (3) $H_{3} P O_{2}$ (4) $H_{3} P O_{4}$ 343. $Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "X" with 6-equivalents of "Y". "X" and "Y", respectively are:$ (1) $B (O H)_{3} and N H_{3}$ (2) $B_{2} H_{6} and N H_{3}$ (3) $B_{2} H_{6} and H N_{3}$ (4) $N H_{3} and B_{2} O_{3}$ 344. $The oxide without nitrogen-nitrogen bond is :$ (1) $N_{2} O$ (2) $N_{2} O_{4}$ (3) $N_{2} O_{3}$ (4) $N_{2} O_{5}$ 345. $Which of the following statements is not valid for oxoacids of phosphorus?$ (1) $Orthophosphoric acid is used in the manufacture of triple superphosphate.$ (2) $Hypophosphorous acid is a diprotic acid.$ (3) $All oxoacids contain tetrahedral four coordinated phosphorus.$ (4) $All oxoacids contain at least one P = 0 unit and one P—OH group.$ 346. $Identify the incorrect statement related to P C l_{5} from the following$ (1) $P C l_{5} molecule in non-reactive$ (2) $Three equatorial P-Cl bonds make an angle of 120º with each other$ (3) $Two axial P-Cl bonds make an angle of 180º with each other$ (4) $Axial P-Cl bonds are longer than equatorial P-Cl bonds$ 347. $The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl_{5} is :$ (1) $0$ (2) $2$ (3) $1$ (4) $3$ 348. $Match List - I withList - II: List-I (Species) (A) XeF_{2} (B) XeO_{2} F_{2} (C) XeO_{3} F_{2} (D) XeF_{4} List-II (Number of lone pairs of electrons on the central atom) (i) 0 (ii) 1 (iii) 2 (iv) 3 Choose the most appropriate answer from the options given below :$ (1) $(A) - (iv), (B) - (i), (C) - (ii), (D) - (iii)$ (2) $(A) - (iii), (B) -(iv), (C) - (ii), (D) - (i)$ (3) $(A) - (iii), (B) - (ii), (C) - (iv), (D) - (i)$ (4) $(A) - (iv), (B) - (ii), (C) - (i), (D) - (iii)$ 349. $The pair in which phosphorous atoms have a formal oxidation state of +3 is$ (1) $Pyrophosphorous and hypophosphoric acids$ (2) $Orthophosphorous and hypophosphoric acids$ (3) $Pyrophosphorous and pyrophosphoric acids$ (4) $Orthophosphorous and pyrophosphorous acids$ 350. $Which one of the following compounds of Group- 14 elements is not known?$ (1) $[G e C l_{6}]^{2 -}$ (2) $[S n (O H)_{6}]^{2 -}$ (3) $[S i C l_{6}]^{2 -}$ (4) $[S i F_{6}]^{2 -}$ 351. $In which of the following compounds, nitrogen exhibits highest oxidation state?$ (1) $N_{2} H_{4}$ (2) $N H_{3}$ (3) $N_{3} H$ (4) $N H_{4} O H$ 352. $Which of the Phosphorus oxoacid can create silver mirror from A g N O_{3} solution ?$ (1) $(H P O_{3})_{n}$ (2) $H_{4} P_{2} O_{5}$ (3) $H_{4} P_{2} O_{6}$ (4) $H_{4} P_{2} O_{7}$ 353. $The oxoacid of Sulphur that does not contain bond between Sulphur atoms is :$ (1) $H_{2} S_{4} O_{6}$ (2) $H_{2} S_{2} O_{3}$ (3) $H_{2} S_{2} O_{7}$ (4) $H_{2} S_{2} O_{4}$ 354. $The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF_{4} respectively, are:$ (1) $s p^{3} d^{2} and 1$ (2) $s p^{3} d and 2$ (3) $s p^{3} d^{2} and 2$ (4) $s p^{3} d and 1$ 355. $Which ofthe following would have apermanent dipole moment?$ (1) $S i F_{4}$ (2) $S F_{4}$ (3) $X e F_{4}$ (4) $B F_{3}$ 356. $The reaction of NO with N_{2} O_{4} at 250 K gives$ (1) $N_{2} O_{3}$ (2) $N_{2} O_{5}$ (3) $N_{2} O$ (4) $N O_{2}$ 357. $A pair of amphoteric oxides is$ (1) $Al_{2} O_{3}, Li_{2} O$ (2) $BeO, BO_{3}$ (3) $BeO, MgO$ (4) $BeO, ZnO$ 358. $Which statement is wrong?$ (1) $Beryl is an example of cyclic silicate.$ (2) $M g_{2} S i O_{4} is orthosilicate.$ (3) $Basic structural unit in silicates is the S i O_{4} tetrahedron.$ (4) $Feldspars are not aluminosilicates.$ 359. $The number of molecules or ions from the following, which do not have odd number of electrons are________. (A) N O_{2} (B) I C l_{4}^{-} (C) BrF (D) C 1 O_{2} (E) N O_{2}^{+} (F) NO$ 360. $The number of interhalogens from the following having square pyramidal structure is : C 1 F_{3}, I F_{7}, B r F_{5}, B r F_{3}, I_{2} C 1_{6}, I F_{5}, GlF, C l F_{5}$