p-Block Elements PYQs Set 11 (PDF)

Set 11 of 14 · Questions 301-330 of 400

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Mere Teacher · Previous Year Questions NEET Chemistry · p-Block Elements · Set 11 (Q301-330)
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301. $Element not showing variable oxidation state is :$ (1) $Bromine$ (2) $Iodine$ (3) $Chlorine$ (4) $Fluorine$ 302. $Aqueous solution of ammonia consists of$ (1) $H^{+}$ (2) $O H^{-}$ (3) $N H_{4}^{+}$ (4) $N H_{4}^{+} and OH$ 303. $Arrange the following bonds according to their average bond energies in descending order:$ (1) $C - Cl > C - Br > C - I > C - F$ (2) $C - F < C - Cl < C - Br < C - I$ (3) $C - F > C - Cl > C - Br > C - I$ (4) $C - I < C - Br < C - F < C - Cl$ 304. $The correct order of bond enthalpy (kj m o l^{- 1}) is$ (1) $Si - Si > C - C > Sn - Sn > Ge - Ge$ (2) $Si - Si > C - C > Ge - Ge > Sn - Sn$ (3) $C - C > Si - Si > Sn - Sn > Ge - Ge$ (4) $C - C> Si - Si > Ge - Ge > Sn - Sn$ 305. $Which of the following structure is similar to graphite?$ (1) $B_{4} C$ (2) $B_{2} H_{6}$ (3) $BN$ (4) $B$ 306. $Heating white phosphorus with cone. NaOH solution gives mainly$ (1) $N a_{3} P and H_{2} O$ (2) $H_{3} PO and NaH$ (3) $P (O H)_{3} and N a H_{2} P O_{4}$ (4) $P H_{3} and N a H_{2} P O_{2}$ 307. $Oxidation states of P in H4P2O5, H4P2O6, H4P2O7 are respectively :$ (1) $+3, +5, +4$ (2) $+5, +3, +4$ (3) $+5, +4, +3$ (4) $+3, +4, +5$ 308. $Boric acid in solid, whereas B F_{3} is gas at room temperature because of$ (1) $Strong ionic bond in Boric acid$ (2) $Strong van der Waal's interaction in Boric acid$ (3) $Strong hydrogen bond in Boric acid$ (4) $Strong covalent bond in B F_{3}$ 309. $Which one of the following group-15 hydride is the strongest reducing agent ?$ (1) $A s H_{3}$ (2) $B i H_{3}$ (3) $P H_{3}$ (4) $S b H_{3}$ 310. $Consider the oxides of group 14 elements SiO_{2}, GeO_{2}, SnO_{2}, PbO_{2}, CO and GeO . The amphoteric oxides are$ (1) $GeO, GeO_{2}$ (2) $SiO_{2}, GeO_{2}$ (3) $SnO_{2}, PbO_{2}$ (4) $SnO_{2}, CO$ 311. $Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A :- Carbon forms two important oxides - CO and C O_{2} . CO is neutral whereas C O_{2} is acidic in nature, Reason R :- C O_{2} can combine with water in a limited way to form carbonic acid, while CO is sparingly soluble in water. choose the most appropriate answer from the options given below :-$ (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) $A is not correct but R is correct,$ (4) $A is correct but R is not correct,$ 312. $Among the following, the correct order of acidic nature is :$ (1) $HCIO4 < HCIO2 < HCIO < HCIO3$ (2) $HCIO3 < HCIO4 < HCIO2 < HCIO$ (3) $HCIO < HCIO2 < HCIO3 < HCIO4$ (4) $HCIO2 < HCIO < HCIO3 < HCIO4$ 313. $Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?$ (1) $Is soluble in water.$ (2) $Is used as a food preservative.$ (3) $Forms ‘acid‐rain’.$ (4) $Is a reducing agent$ 314. $Aqueous solution of which of the following boron compounds will be strongly basic in nature?$ (1) $N a B H_{4}$ (2) $L i B H_{4}$ (3) $B_{2} H_{6}$ (4) $N a_{2} B_{4} O_{7}$ 315. $Choose the correct statements from the following A. All group 16 elements form oxides of general formula EO_{2} and EO_{3} where E = S, Se, Te and Po . Both the types of oxides are acidic in nature. B. TeO_{2} is an oxidising agent while SO_{2} is reducing in nature. C. The reducing property decreases from H_{2} S to H_{2} Te down the group. D. The ozone molecule contains five lone pairs of electrons. Choose the correct answer from the options given below:$ (1) $A and D only$ (2) $B and C only$ (3) $C and D only$ (4) $A and B only$ 316. $Basicity of orthophosphoric acid is$ (1) $2$ (2) $3$ (3) $4$ (4) $5$ 317. $The gases respectively absorbed by alkaline pyrogallol and oil of cinnamon are$ (1) $O_{3}, C H_{4}$ (2) $O_{2}, O_{3}$ (3) $S O_{2}, C H_{4}$ (4) $N_{2} O, O_{3} .$ 318. $When copper is heated with conc. H N O_{3} it produces$ (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) $C u (N O_{3})_{2} and NO$ 319. $The straight chain polymer is formed by$ (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) $hydrolysis of followed by condensation polymerisation.$ 320. $The oxidation number of sulphur in S8, S2F2, H2S respectively are :$ (1) $0, + 1 and - 2$ (2) $+ 2, + 1 and - 2$ (3) $0, + 1 and + 2$ (4) $- 2, + 1 and - 2$ 321. $The acid that is believed to be mainly responsible for the damage of Taj Mahal is$ (1) $Sulfuric acid$ (2) $Hydrofluoric acid$ (3) $Phosphoric acid$ (4) $Hydrochloric acid$ 322. $In K O_{2}, the nature of oxygen species and the oxidation state of oxygen atom are, respectively :$ (1) $Oxide and -2$ (2) $Superoxide and -1/2$ (3) $Peroxide and -1/2$ (4) $Superoxide and -1$ 323. $Concentrated H N O_{3} reacts with Iodine to give$ (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) $H I O_{4}, N_{2} O and H_{2} O$ 324. $Which of the following oxoacids of phosphorus has strongest reducing property ?$ (1) $H_{4} P_{2} O_{7}$ (2) $H_{3} P O_{3}$ (3) $H_{3} P O_{2}$ (4) $H_{3} P O_{4}$ 325. $Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "X" with 6-equivalents of "Y". "X" and "Y", respectively are:$ (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) $N H_{3} and B_{2} O_{3}$ 326. $The oxide without nitrogen-nitrogen bond is :$ (1) $N_{2} O$ (2) $N_{2} O_{4}$ (3) $N_{2} O_{3}$ (4) $N_{2} O_{5}$ 327. $Which of the following statements is not valid for oxoacids of phosphorus?$ (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) $All oxoacids contain at least one P = 0 unit and one P—OH group.$ 328. $Identify the incorrect statement related to P C l_{5} from the following$ (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) $Axial P-Cl bonds are longer than equatorial P-Cl bonds$ 329. $The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl_{5} is :$ (1) $0$ (2) $2$ (3) $1$ (4) $3$ 330. $Match List - I withList - II: List-I (Species) (A) XeF_{2} (B) XeO_{2} F_{2} (C) XeO_{3} F_{2} (D) XeF_{4} List-II (Number of lone pairs of electrons on the central atom) (i) 0 (ii) 1 (iii) 2 (iv) 3 Choose the most appropriate answer from the options given below :$ (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) $(A) - (iv), (B) - (ii), (C) - (i), (D) - (iii)$