p-Block Elements PYQs Set 6 (PDF)

Set 6 of 15 · Questions 151-180 of 423

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Mere Teacher · Previous Year Questions JEE Main Chemistry · p-Block Elements · Set 6 (Q151-180)
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151. $The corrects statement with respect to dinitrogen is:$ (1) $N_{2} is paramagnetic in nature$ (2) $it can be used as an inert diluent for reactive chemicals$ (3) $it can be combine with dioxygen at 25°C$ (4) $liquid dinitrogen is not used in cryosurgery$ 152. $The chloride that CAN NOT get hydrolysed is:$ (1) $PbCl_{4}$ (2) $CCl_{4}$ (3) $SnCl_{4}$ (4) $SiCl_{4}$ 153. $Which of the following oxides is the most acidic ?$ (1) $N2O5$ (2) $P2O5$ (3) $As2O5$ (4) $Sb2O5$ 154. $The correct statements from the following are :(A) Ionic radii of trivalent cations of group 13 elements decreases down the group.(B) Electronegativity of group 13 elements decreases down the group.(C) Among the group 13 elements, Boron has highest first ionisation enthalpy.(D) The trichloride and triiodide of group 13 elements are covalent in nature. Choose the correct answer from the options given below:$ (1) $(C) and (D) Only$ (2) $(A) and (D) Only$ (3) $(A) and (C) Only$ (4) $(B) and (D) Only$ 155. $The one that is extensively used as a piezoelectric material is:$ (1) $tridymite$ (2) $amorphous silica$ (3) $quartz$ (4) $mica$ 156. $The element which forms oxides in all oxidation states +I to +V is :$ (1) $N$ (2) $P$ (3) $As$ (4) $Sb$ 157. $Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K?$ (1) $White phosphorus$ (2) $Yellow phosphorus$ (3) $β-Black phosphorus$ (4) $α -Black phosphorus$ 158. $Bond dissociation energy of E-H bond of the " H_{2} E" hydrides of group 16 elements (given below), follows order. (A) O (B) S (C) Se (D) Te$ (1) $A>B>C>D$ (2) $A>B>D>C$ (3) $B > A > C > D$ (4) $D > C > B > A$ 159. $Which of the following does not show electrical conduction?$ (1) $Diamond$ (2) $Graphite$ (3) $Potassium$ (4) $Sodium$ 160. $The incorrect statement among the following is options_{1} .$ (1) $PH_{3} shows lower proton affinity than NH_{3} .$ (2) $SO_{2} can act as an oxidizing agent, but not as a reducing agent.$ (3) $PF_{3} exists but NF_{5} does not.$ (4) $NO_{2} can dimerise easily.$ 161. $Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.$ (1) $Noble gases have very high melting and boiling points$ (2) $Noble gases have weak dispersion forces$ (3) $Noble gases have large positive values of electron gain enthalpy$ (4) $Noble gases are sparingly soluble in water$ 162. $In which of the following arrangements the given sequence is not strictly according to the property indicated against it?$ (1) $H F < H C l < H B r < H I : increasing acidic strength$ (2) $H_{2} O < H_{2} S < H_{2} S e < H_{2} T e : increasing p K_{a} values$ (3) $N H_{3} < P H_{3} < A s H_{3} < S b H_{3} : increasing acidic character$ (4) $C O_{2} < S i O_{2} < S n O_{2} < P b O_{2} : increasing oxidising power$ 163. $The reaction in which the hybridization of the underlined atom is affected is$ (1) $XeF_{4} + Sb F_{5} \to$ (2) $H_{2} SO_{4} + NaCl 420 K$ (3) $H_{3} P O_{2} Disproportionation$ (4) $NH_{3} H^{+}$ 164. $Which of the following fluorides does not exist?$ (1) $N F_{5}$ (2) $P F_{5}$ (3) $A s F_{5}$ (4) $S b F_{5}$ 165. $Which one of the following elements is unable to form M F_{6}^{3 -} ion?$ (1) $Ga$ (2) $Al$ (3) $B$ (4) $In$ 166. $Carbon and silicon belong to (IV) group. The maximum coordination number of carbons in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to$ (1) $availability oflow lying d ‐orbitals in silicon$ (2) $large size of silicon$ (3) $more electropositive nature of silicon$ (4) $both (b) and (c).$ 167. $Reaction of ammonia with excess Cl_{2} gives$ (1) $NH4Cland HCl$ (2) $NCl3and HCL$ (3) $NC l_{3} and N H_{4} Cl$ (4) $N H_{4} Cl and N_{2}$ 168. $The difference between electron gain enthalpies will be maximum between :$ (1) $Ne and F$ (2) $Ar and F$ (3) $Ne and Cl$ (4) $Ar and Cl$ 169. $Aqua regiais used for dissolving noble metals (Au, Pt, etc.). The gas evolved in this process is$ (1) $NO$ (2) $N_{2}$ (3) $N_{2} O_{5}$ (4) $N_{2} O_{3}$ 170. $Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens ?$ (1) $Nitric acid$ (2) $Sodium hydroxide$ (3) $Hydrochloric acid$ (4) $Ammonia$ 171. $The element that does NOT show catenation is:$ (1) $Ge$ (2) $Si$ (3) $Sn$ (4) $Pb$ 172. $Which of the following oxide is amphoteric?$ (1) $S n O_{2}$ (2) $C a O$ (3) $S i O_{2}$ (4) $C O_{2}$ 173. $Which ordering of compounds is according to the decreasing order of the oxidation state of nitrogen?$ (1) $H N O_{3}, NO, N H_{4} Cl, N_{2}$ (2) $H N O_{3}, NO, N_{2}, N H_{4} Cl$ (3) $H N O_{3}, N H_{4} Cl, NO, N_{2}$ (4) $NO, H N O_{3}, N H_{4} Cl, N_{2}$ 174. $Match List-I with List-I Name of reaction A. Hell-Volhard Zelinsky reaction B. Iodoform reaction C. Etard reaction D. Gatterman Koch reaction List-II Reagent used I. NaOH+ I_{2} II. (i) C r O 2 C l_{2}, C S_{2} (ii) H_{2} O III. (i) B r_{2} /red phosphorus (ii) H_{2} O IV. CO, HCl, anhyd. A l C l_{3} Choose the correct answer from the options given below:$ (1) $A-III; B-I; C-II; D-IV$ (2) $A-I; B-II; C-III; D-IV$ (3) $A-III; B-II; C-I; D-IV$ (4) $A -III; B-I; C-IV; D-II$ 175. $Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound is :$ (1) $P b_{3} O_{4}$ (2) $Pb O_{2}$ (3) $PbS O_{4}$ (4) $PbO$ 176. $The order of solubility of lithium halides in non-polar solvents follows the order :$ (1) $LiI > LiBr > LiCl > LiF$ (2) $LiF > LiI > LiBr > LiCl$ (3) $LiCl > LiF > LiI > LiBr$ (4) $LiBr > LiCl > LiF > LiI$ 177. $Which is the strongest acid in the following?$ (1) $H C l O_{4}$ (2) $H_{2} S O_{3}$ (3) $H_{2} S O_{4}$ (4) $H C l O_{3}$ 178. $Given below are two statements : Statement -I :The pentavalent oxide of group- 15 element. E_{2} O_{5} . is less acidic than trivalent oxide. E_{2} O_{3} . of the same element. Statement -II :The acidic character of trivalent oxide of group 15 elements. E_{2} 0_{3} . decreases down the group. choose most appropriate answer from the options given below :$ (1) $Both Statement I and Statement II are true.$ (2) $Both Statement I and Statement II are false.$ (3) $Statement I true, but statement II is false.$ (4) $Statement I is false but statement II is true.$ 179. $Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y) compound (X) gives white precipitate with silver nitrate solution. The average bond order between Cl and O atoms in (Y) is :$ 180. $If the formula of Borax is N a_{2} B_{4} O_{x} (O H)_{y} . z H_{2} O, then x + y + z =______$