p-Block Elements PYQs Set 8 (PDF)

Set 8 of 14 · Questions 211-240 of 400

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Mere Teacher · Previous Year Questions NEET Chemistry · p-Block Elements · Set 8 (Q211-240)
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211. $The incorrect statement regarding the reaction given below is$ (1) $The product 'B' formed in the above reaction is p-nitroso compound at low temperature$ (2) $'B' is N-nitroso ammonium compound$ (3) $The reaction occurs at low temperature$ (4) $The electrophile involved in the reaction is N O^{+}$ 212. $The shape of O2F2 is similar to that of :$ (1) $C2F2$ (2) $H2O2$ (3) $H2F2$ (4) $C2H2$ 213. $Match List-I with List-II: List-I (oxoacids of sulphur) (A) Peroxodisulphuric acid (B) Sulphuric acid (C) Pyrosulphuric acid (D) Sulphurous acid List-II (Bonds of Sulphur) (I) Two S-OH, Four S=O, One S-O-S (II) Two S-OH, One S=O (III) Two S-OH, Four S=O, One S-O-O-S (IV) Two S-OH, Two S=O Choose the Correct Answer from the options given Below :$ (1) $(A)-(III); (B)-(IV); (C)-(II); (D)-(I)$ (2) $(A)-(I); (B)-(III); (C)-(II); (D)-(IV)$ (3) $(A)-(III); (B)-(IV); (C)-(I); (D)-(II)$ (4) $(A)-(I); (B)-(III); (C)-(IV); (D)-(II)$ 214. $Reaction of BeO with ammonia and hydrogen fluoride gives 'A' which on thermal decomposition gives B e F_{2} and N H_{4} F. What is 'A' ?$ (1) $(N H_{4})_{2} B e F_{4}$ (2) $H_{3} N B e F_{3}$ (3) $(N H_{4}) B e F_{3}$ (4) $(N H_{4}) B e_{2} F_{5}$ 215. $In which of the following molecules are all the bonds are not equal?$ (1) $N F_{3}$ (2) $C l F_{3}$ (3) $B F_{3}$ (4) $A l F_{3}$ 216. $Strong reducing behaviour of H_{3} P O_{2} is due to$ (1) $high electron gain enthalpy of phosphorus$ (2) $high oxidation state of phosphorus$ (3) $presence of two -OH groups and one P—H bond$ (4) $presence of one -OH group and two P—H bonds.$ 217. $Consider the following reaction : A + alkali \to B (Major Product) If B is an oxoacid of phosphorus with no P-H bond, then A is:$ (1) $White P_{4}$ (2) $Red P_{4}$ (3) $P_{2} O_{3}$ (4) $H_{3} P O_{3}$ 218. $Which of the following bonds will be most polar?$ (1) $N—CI$ (2) $O—F$ (3) $N—F$ (4) $N‐N$ 219. $Urea reacts with water to form A which will decompose to form B . B when passed through Cu^{2 +} (aq), deep blue colour solution C is formed. What is the formula of C from the following?$ (1) $(Cu (NH_{3})_{4})^{2 +}$ (2) $Cu (OH)_{2}$ (3) $CuCO_{3} \cdot Cu (OH)_{2}$ (4) $CuSO_{4}$ 220. $Which of the following statement is true?$ (1) $Silicon exhibits 4 coordination number in its compound.$ (2) $Bond energy of F_{2} is less than C l_{2} .$ (3) $Mn(III) oxidation state is more stable than Mn(II) in aqueous state.$ (4) $Elements of 1 5^{t h} gp shows only + 3 and + 5 oxidation states.$ 221. $Repeated use of which one of the following fertilizers would increase the acidity of the soil?$ (1) $Ammonium sulphate$ (2) $Superphosphate of lime$ (3) $Urea$ (4) $Potassium nitrate$ 222. $The number of P - O - P bonds in H_{4} P_{2} O_{7}, (H P O_{3})_{3}, and P_{4} O_{10} are respectively$ (1) $0, 3, 6$ (2) $0 3 4$ (3) $1, 2, 4$ (4) $1, 3, 6$ 223. $Good reducing nature of H_{3} PO_{2} is attributed to the presence of :$ (1) $Two P - OH bonds$ (2) $One P - H bond$ (3) $Two P - H bonds$ (4) $One P - OH bond$ 224. $When orthophosphoric acid is heated to 60 0^{o} C, the product formed is$ (1) $P H_{3}$ (2) $P_{2} O_{5}$ (3) $H_{3} P O_{3}$ (4) $H P O_{3}$ 225. $Among the following, the pair in which the two species are not isostructural is :$ (1) $SiF4 and SF4$ (2) $IO3- and XeO3$ (3) $BH4- and NH4+$ (4) $PF6- and SF6$ 226. $Which of the following oxoacid of sulphur has - O - O - linkage?$ (1) $H_{2} SO_{4}, sulphuric acid$ (2) $H_{2} S_{2} O_{8}, peroxodisulphuric acid$ (3) $H_{2} S_{2} O_{7}, pyrosulphuric acid$ (4) $H_{2} SO_{3}, sulphurous acid$ 227. $In which of the following molecules, are all the bonds not equal ?$ (1) $NF3$ (2) $ClF3$ (3) $BF3$ (4) $AlF3$ 228. $Match List-I with List-II. List-I Reaction (A) 4 N H_{3} (g) + 5 O_{2} (g) \to 4NO(g) + 6 H_{2} O(g) (B) N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g) (C) C_{12} H_{22} O_{11} (aq) + H_{2} O(l) \to C_{6} H_{12} 0_{6} (Glucose) + C_{6} H_{12} O_{6} (Fructose) (D) 2 S O_{2} (g) + O_{2} (g) \to 2 S O_{3} (g) List-II Catalyst (I) NO(g) (II) H_{2} S O_{4} (l) (III) Pt(s) (IV) Fe(s) Choose the correct answer from the options given below :$ (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) $(A) - (III), (B) - (II), (C) - (IV), (D) - (I)$ 229. $Bleaching powder is obtained by the action of chlorine gas and$ (1) $dilute solution of C a (O H)_{2}$ (2) $concentrated solution of C a (O H)_{2}$ (3) $dry C a O$ (4) $dry slaked lime.$ 230. $Match List -1 with List - II. List -I (Processes/Reactions) (A) 2 S O_{2} (g)+ O_{2} (g) \to 2 S O_{3} (g) (B) 4 N H_{3} (g)+ 5 O_{2} (g) \to 4NO(g)+ 6 H_{2} O(g) (C) N_{2} (g)+ 3 H_{2} (g) \to 2 N H_{3} (g) (D) Vegetable oil(l)+H_{2} \to Vegetable ghee(s) List - II (Catalyst) (I) Fe(s) (II) Pt(s)-Rh(s) (III) V_{2} O_{5} (IV) Ni(s) Choose the correct answer from the options given$ (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) $(A) - (IV), (B) - (II), (C) - (III), (D) - (I)$ 231. $Boric acid is an acid because its molecule$ (1) $contains replaceable H^{+} ion$ (2) $gives up a proton$ (3) $accepts O H^{-} from water releasing proton$ (4) $combines with proton from water molecule.$ 232. $A l F_{3} is soluble in HF only in presence of K F . It is due to the formation of$ (1) $K_{3} [A l F H]$ (2) $K_{3} [A l F_{6}]$ (3) $A l H_{3}$ (4) $K [A l F_{3} H$ 233. $Structures of B e C l_{2} in solid state, vapour phase and at very high temperature respectively are:$ (1) $Monomeric, Dimeric, Polymeric$ (2) $Dimeric, Polymeric, Monomeric$ (3) $Polymeric, Monomeric, Dimeric$ (4) $Polymeric, Dimeric, Monomeric$ 234. $Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom. Reason R: A molecule with 2 chiral carbons is always optically active. In the light of above statements, chose the correct answer from the options given below:$ (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) $Both A and R are true but R is NOT the correct explanation of A$ 235. $The tendency of B F_{3}, B C l_{3} and B B r_{3} to behave as Lewis acid decreases in the sequence$ (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) $B F_{3} > B C l_{3} > B B r_{3}$ 236. $H_{3} P O_{2} is the molecular formula of an acid of phosphorus. Its name and basicity respectively are$ (1) $phosphorous acid and two$ (2) $hypophosphorous acid and two$ (3) $hypophosphorous acid and one$ (4) $hypophosphoric acid and two.$ 237. $The angular shape of ozone molecule (O3) consists of$ (1) $1 sigma and 1 π bond$ (2) $2 sigma and 1 π bond$ (3) $1 sigma and 2 π bond$ (4) $3 sigma and 1 π bond$ 238. $The bleaching action of chlorine is due to$ (1) $reduction$ (2) $hydrogenation$ (3) $chlorination$ (4) $oxidation.$ 239. $The correct statement about ICl_{5} and ICl_{4}^{-} is:$ (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) $ICl_{5} is square pyramidal and ICl_{4}^{-} is square planar$ 240. $Nitrogen is relatively inactive element because$ (1) $its atom has a stable electronic configuration$ (2) $it has low atomic radius$ (3) $its electronegativity is fairly high$ (4) $dissociation energy of its molecule is fairly high.$