p-Block Elements PYQs Set 12 (PDF)

Set 12 of 14 · Questions 331-360 of 400

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Mere Teacher · Previous Year Questions NEET Chemistry · p-Block Elements · Set 12 (Q331-360)
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331. $The pair in which phosphorous atoms have a formal oxidation state of +3 is$ (1) $Pyrophosphorous and hypophosphoric acids$ (2) $Orthophosphorous and hypophosphoric acids$ (3) $Pyrophosphorous and pyrophosphoric acids$ (4) $Orthophosphorous and pyrophosphorous acids$ 332. $Which one of the following compounds of Group- 14 elements is not known?$ (1) $[G e C l_{6}]^{2 -}$ (2) $[S n (O H)_{6}]^{2 -}$ (3) $[S i C l_{6}]^{2 -}$ (4) $[S i F_{6}]^{2 -}$ 333. $In which of the following compounds, nitrogen exhibits highest oxidation state?$ (1) $N_{2} H_{4}$ (2) $N H_{3}$ (3) $N_{3} H$ (4) $N H_{4} O H$ 334. $Which of the Phosphorus oxoacid can create silver mirror from A g N O_{3} solution ?$ (1) $(H P O_{3})_{n}$ (2) $H_{4} P_{2} O_{5}$ (3) $H_{4} P_{2} O_{6}$ (4) $H_{4} P_{2} O_{7}$ 335. $The oxoacid of Sulphur that does not contain bond between Sulphur atoms is :$ (1) $H_{2} S_{4} O_{6}$ (2) $H_{2} S_{2} O_{3}$ (3) $H_{2} S_{2} O_{7}$ (4) $H_{2} S_{2} O_{4}$ 336. $The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF_{4} respectively, are:$ (1) $s p^{3} d^{2} and 1$ (2) $s p^{3} d and 2$ (3) $s p^{3} d^{2} and 2$ (4) $s p^{3} d and 1$ 337. $Which ofthe following would have apermanent dipole moment?$ (1) $S i F_{4}$ (2) $S F_{4}$ (3) $X e F_{4}$ (4) $B F_{3}$ 338. $The reaction of NO with N_{2} O_{4} at 250 K gives$ (1) $N_{2} O_{3}$ (2) $N_{2} O_{5}$ (3) $N_{2} O$ (4) $N O_{2}$ 339. $A pair of amphoteric oxides is$ (1) $Al_{2} O_{3}, Li_{2} O$ (2) $BeO, BO_{3}$ (3) $BeO, MgO$ (4) $BeO, ZnO$ 340. $Which statement is wrong?$ (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) $Feldspars are not aluminosilicates.$ 341. $P C l_{3} reacts with water to form$ (1) $P H_{3}$ (2) $H_{3} P O_{3}, HC1$ (3) $P O C l_{3}$ (4) $H_{3} P O_{4}$ 342. $Among the following basic oxide is :$ (1) $S O_{3}$ (2) $S i O_{2}$ (3) $CaO$ (4) $A 1_{2} O_{3}$ 343. $Which would quickly absorb oxygen?$ (1) $Alkaline solution of pyrogallol$ (2) $Conc. H_{2} S O_{4}$ (3) $Lime water$ (4) $Alkaline solution of C u S O_{4} .$ 344. $Which of the following is an insulator?$ (1) $Graphite$ (2) $Aluminum$ (3) $Diamond$ (4) $Silicon$ 345. $Percentage of lead in lead pencil is$ (1) $80$ (2) $20$ (3) $zero$ (4) $70$ 346. $Water gas is produced by$ (1) $passing steam through a red-hot coke$ (2) $saturating hydrogen with moisture$ (3) $mixing oxygen and hydrogen in the ratio of 1: 2$ (4) $heating a mixture of C O_{2} and C H_{4} in petroleum refineries.$ 347. $Which one of the following noble gases has an unusual property of diffusing through the materials such as ruber, glass or plastic?$ (1) $He$ (2) $Ne$ (3) $Kr$ (4) $Ar$ 348. $Molecules of a noble gas do not possess vibrational energy because a noble gas$ (1) $is monoatomic$ (2) $is chemically inert$ (3) $has completely filled shells$ (4) $is diamagnetic.$ 349. $Which noble gas has least tendency to form compounds?$ (1) $Ar$ (2) $Kr$ (3) $He$ (4) $Ne$ 350. $Which of these is not a monomer for a high molecular mass silicone polymer?$ (1) $M e_{3} SiCl$ (2) $P h S i C l_{3}$ (3) $M e S i C l_{3}$ (4) $M e_{2} S i C l_{2}$ 351. $In the reaction : P2O5 + 2HNO3 —\to 2HPO3 + x, the term x is :$ (1) $N2O4$ (2) $H2O only$ (3) $N2O5$ (4) $PNO3$ 352. $Match the Compounds of Xe in Column-I with the molecular structure in Column-II. Column-I (A) XeF_{2} (B) XeF_{4} (C) XeO_{3} (D) XeOF_{4} Column-II (I) Square planar (II) Linear (III) Square pyramidal (IV) Pyramidal$ (1) $(A)-(II); (B)-(I); (C)-(IV); (D)-(III)$ (2) $(A)-(II); (B)-(I); (C)-(III); (D)-(IV)$ (3) $(A)-(II); (B)-(IV); (C)-(III); (D)-(I)$ (4) $(A)-(II); (B)-(III); (C)-(I); (D)-(IV)$ 353. $On boiling phosphorus with KOH solution, product formed is$ (1) $Potassium sulphate$ (2) $Phosphorus pentoxide$ (3) $Phosphorus hydroxide$ (4) $Phosphine$ 354. $In NO3- ion, the number of bond pairs and lone pair of electrons on nitrogen atom are$ (1) $2, 2$ (2) $3, 1$ (3) $1, 3$ (4) $4, 0$ 355. $Which of the following is the most basic oxide ?$ (1) $SeO2$ (2) $Al2O3$ (3) $Sb2O3$ (4) $Bi2O3$ 356. $Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason : The reaction between nitrogen and oxygen requires high temperature.$ (1) $Both assertion and reason are correct, and the reason is the correct explanation for the assertion$ (2) $Both assertion and reason are correct, but the reason is not the correct explanation for the assertion$ (3) $The assertion is incorrect, but the reason is correct$ (4) $Both are assertion and reason are incorrect$ 357. $Which two of the following salts are used for preparing iodized salt ? (i) KIO3, (ii) KI, (iii) I2, (iv) HI$ (1) $(i) and (ii)$ (2) $(i) and (iii)$ (3) $(ii) and (iv)$ (4) $(iii) and (iv)$ 358. $The most abundant noble gas in atmosphere is$ (1) $neon$ (2) $argon$ (3) $xenon$ (4) $krypton.$ 359. $The compound which has molecular nature in gas phase but ionic in solid state is$ (1) $PCl5$ (2) $CCl4$ (3) $PCl3$ (4) $POCl3$ 360. $The variation of the boiling point of the hydrogen halides is in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride ?$ (1) $The electronegativity of fluorine is much higher than for other elements in the group.$ (2) $There is strong hydrogen bonding between HF molecules$ (3) $The bond energy of HF molecules is greater than in other hydrogen halides.$ (4) $The effect of nuclear shielding is much reduced in fluorine which polarises the HF molecule.$