p-Block Elements PYQs Set 13 (PDF)

Set 13 of 15 · Questions 361-390 of 423

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Mere Teacher · Previous Year Questions JEE Main Chemistry · p-Block Elements · Set 13 (Q361-390)
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361. $P C l_{3} reacts with water to form$ (1) $P H_{3}$ (2) $H_{3} P O_{3}, HC1$ (3) $P O C l_{3}$ (4) $H_{3} P O_{4}$ 362. $Among the following basic oxide is :$ (1) $S O_{3}$ (2) $S i O_{2}$ (3) $CaO$ (4) $A 1_{2} O_{3}$ 363. $Which would quickly absorb oxygen?$ (1) $Alkaline solution of pyrogallol$ (2) $Conc. H_{2} S O_{4}$ (3) $Lime water$ (4) $Alkaline solution of C u S O_{4} .$ 364. $Which of the following is an insulator?$ (1) $Graphite$ (2) $Aluminum$ (3) $Diamond$ (4) $Silicon$ 365. $Percentage of lead in lead pencil is$ (1) $80$ (2) $20$ (3) $zero$ (4) $70$ 366. $Water gas is produced by$ (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) $heating a mixture of C O_{2} and C H_{4} in petroleum refineries.$ 367. $Which one of the following noble gases has an unusual property of diffusing through the materials such as ruber, glass or plastic?$ (1) $He$ (2) $Ne$ (3) $Kr$ (4) $Ar$ 368. $Molecules of a noble gas do not possess vibrational energy because a noble gas$ (1) $is monoatomic$ (2) $is chemically inert$ (3) $has completely filled shells$ (4) $is diamagnetic.$ 369. $Which noble gas has least tendency to form compounds?$ (1) $Ar$ (2) $Kr$ (3) $He$ (4) $Ne$ 370. $Which of these is not a monomer for a high molecular mass silicone polymer?$ (1) $M e_{3} SiCl$ (2) $P h S i C l_{3}$ (3) $M e S i C l_{3}$ (4) $M e_{2} S i C l_{2}$ 371. $In the reaction : P2O5 + 2HNO3 —\to 2HPO3 + x, the term x is :$ (1) $N2O4$ (2) $H2O only$ (3) $N2O5$ (4) $PNO3$ 372. $Match the Compounds of Xe in Column-I with the molecular structure in Column-II. Column-I (A) XeF_{2} (B) XeF_{4} (C) XeO_{3} (D) XeOF_{4} Column-II (I) Square planar (II) Linear (III) Square pyramidal (IV) Pyramidal$ (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) $(A)-(II); (B)-(III); (C)-(I); (D)-(IV)$ 373. $On boiling phosphorus with KOH solution, product formed is$ (1) $Potassium sulphate$ (2) $Phosphorus pentoxide$ (3) $Phosphorus hydroxide$ (4) $Phosphine$ 374. $In NO3- ion, the number of bond pairs and lone pair of electrons on nitrogen atom are$ (1) $2, 2$ (2) $3, 1$ (3) $1, 3$ (4) $4, 0$ 375. $Which of the following is the most basic oxide ?$ (1) $SeO2$ (2) $Al2O3$ (3) $Sb2O3$ (4) $Bi2O3$ 376. $Assertion : Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason : The reaction between nitrogen and oxygen requires high temperature.$ (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) $Both are assertion and reason are incorrect$ 377. $Which two of the following salts are used for preparing iodized salt ? (i) KIO3, (ii) KI, (iii) I2, (iv) HI$ (1) $(i) and (ii)$ (2) $(i) and (iii)$ (3) $(ii) and (iv)$ (4) $(iii) and (iv)$ 378. $The most abundant noble gas in atmosphere is$ (1) $neon$ (2) $argon$ (3) $xenon$ (4) $krypton.$ 379. $The compound which has molecular nature in gas phase but ionic in solid state is$ (1) $PCl5$ (2) $CCl4$ (3) $PCl3$ (4) $POCl3$ 380. $The variation of the boiling point of the hydrogen halides is in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride ?$ (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) $The effect of nuclear shielding is much reduced in fluorine which polarises the HF molecule.$ 381. $Match list - I with List - II List-I (A) N_{2} (g) + 3 H_{2} (g) \to 2 N H_{3} (g) (B) CO(g) + 3 H_{2} (g) \to C H_{4} (g)+ H_{2} O(g) (C) CO(g)+ H_{2} (g) \to HCHO(g) (D) CO(g) + 2 H_{2} (g) \to C H_{3} OH(g) List-II (I) Cu (II) Cu/ZnO- C r_{2} O_{3} (III) F e_{x} O_{y} + K_{2} O + A l_{2} O_{3} (IV) Ni Choose the correct answer from the options given below:$ (1) $(A) - (II), (B) - (IV), (C) - (I), (D) - (III)$ (2) $(A) - (II), (B) - (I), (C) - (IV), (D) - (III)$ (3) $(A) - (III), (B) - (IV), (C) - (I), (D) - (II)$ (4) $(A) - (III), (B) - (I), (C) - (IV), (D) - (II)$ 382. $The true statement for the acids of phosphorus, H3PO2 , H3PO3 and H3PO4 is :$ (1) $the order of their acidity is H3PO2 > H3PO3 > H3PO4$ (2) $all of them are reducing in nature$ (3) $all of them are tribasic acids$ (4) $the geometry of phosphorus is tetrahedral in all the three$ 383. $In the reaction of gold with aquaregia, oxidation state of nitrogen changes from$ (1) $+4 to +2$ (2) $+6 to +4$ (3) $+5 to +2$ (4) $+3 to +1$ 384. $Shapes of certain interhalogen compounds are stated below. Which one of them is not correctly stated?$ (1) $I F_{7} : pentagonal bipyramid$ (2) $B r F_{5} : trigonal bipyramid$ (3) $B r F_{3} : planar T-shaped$ (4) $I C l_{3} : planar dimeric$ 385. $Identify the incorrect pair from the following :$ (1) $Fluorspar- BF_{3}$ (2) $Cryolite- Na_{3} AlF_{6}$ (3) $Fluoroapatite- 3 Ca_{3} (PO_{4})_{2} \cdot CaF_{2}$ (4) $Carnallite- KCl \cdot MgCl_{2} \cdot 6 H_{2} O$ 386. $Strong reducing behaviour of H3PO2 is due to :$ (1) $Presence of one -OH group and two P-H bonds$ (2) $High electron gain enthalpy of phosphourus$ (3) $High oxidation state of phosphorus$ (4) $Presence of two -OH groups and one P-H bond.$ 387. $Which of the following oxides of nitrogen is thermally most stable ?$ (1) $N2O5$ (2) $N2O$ (3) $NO$ (4) $N2O3$ 388. $Which group elements from following are called as chalcogens?$ (1) $Group 13$ (2) $Group 15$ (3) $Group 16$ (4) $Group 17$ 389. $Nitrogen gas is obtained by thermal decomposition of$ (1) $Ba (N O_{3})_{2}$ (2) $Ba (N_{3})_{2}$ (3) $N a N O_{2}$ (4) $N a N O_{3}$ 390. $Which inert gas has abnormal behaviour on liquefaction ?$ (1) $Xe$ (2) $He$ (3) $Ar$ (4) $Kr$