NEET Chemistry The p-block Elements-II / p-ब्लॉक तत्व-II Question Bank

done Mock Test - The p-Block Elements (Groups 15, 16, 17 and 18) Total Questions - 25

• question_answer1)
  Arrange the group 15 hydrides in the increasing order of H-M-H bond angle.
  A)
  \[Sb{{H}_{3}}<As{{H}_{3}}<P{{H}_{3}}<N{{H}_{3}}\] done clear
  B)
  \[N{{H}_{3}}<P{{H}_{3}}<As{{H}_{3}}<Sb{{H}_{3}}\] done clear
  C)
  \[N{{H}_{3}}<Sb{{H}_{3}}<As{{H}_{3}}<P{{H}_{3}}\] done clear
  D)
  \[N{{H}_{3}}<P{{H}_{3}}<Sb{{H}_{3}}<As{{H}_{3}}\] done clear
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• question_answer2)
  Which is incorrect among the following options?
  A)
  Basicity \[N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}>Sb{{H}_{3}}\] done clear
  B)
  Oxidation state of nitrogen \[{{N}_{2}}O<NO<{{N}_{2}}{{O}_{3}}<{{N}_{2}}{{O}_{5}}\] done clear
  C)
  Reducing property of \[{{H}_{3}}P{{O}_{4}}>{{H}_{3}}P{{O}_{3}}>{{H}_{3}}P{{O}_{2}}\] done clear
  D)
  Boiling point of \[Sb{{H}_{3}}>As{{H}_{3}}>N{{H}_{3}}>P{{H}_{3}}\] done clear
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• question_answer3)
  \[N{{H}_{4}}N{{O}_{3}}\xrightarrow{\Delta }A+{{H}_{2}}O,\] \[N{{H}_{3}}+{{O}_{2}}\xrightarrow{Catalyst}B+{{H}_{2}}O\] \[Pb{{(N{{O}_{3}})}_{2}}\xrightarrow{\Delta }C+PbO+{{O}_{2}}\] Among A, B, and C paramagnetic substance(s) is/are
  A)
  B and C done clear
  B)
  Only B done clear
  C)
  A and C done clear
  D)
  Only A done clear
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• question_answer4)
  A metal X on heating in nitrogen gas gives Y, Y on treatment with \[{{H}_{2}}O\] gives a colourless gas which when passed through chloroplatinic acid produces yellow precipitate. 'Y' is
  A)
  \[Mg{{(N{{O}_{3}})}_{2}}\]     done clear
  B)
  \[M{{g}_{3}}{{N}_{2}}\] done clear
  C)
  \[N{{H}_{3}}\] done clear
  D)
  \[MgO\] done clear
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• question_answer5)
  The true statement of the acids of phosphorus \[{{H}_{3}}P{{O}_{2}}\],\[{{H}_{3}}P{{O}_{3}}\] and \[{{H}_{3}}P{{O}_{4}}\] is
  A)
  The order of their reducing strength is  \[{{H}_{3}}P{{O}_{2}}>{{H}_{3}}P{{O}_{3}}>{{H}_{3}}P{{O}_{4}}\] done clear
  B)
  the hybridisation of phosphorus is \[s{{p}^{3}}\] in all these. done clear
  C)
  all have one P = O done clear
  D)
  all of these done clear
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• question_answer6)
  Which of following represents the correct order of melting point of hydrides of group 16?
  A)
  \[{{H}_{2}}O>{{H}_{2}}S>{{H}_{2}}Se>{{H}_{2}}Te\] done clear
  B)
  \[{{H}_{2}}O>{{H}_{2}}S>{{H}_{2}}Te>{{H}_{2}}Se\] done clear
  C)
  \[{{H}_{2}}O>{{H}_{2}}Te>{{H}_{2}}Se>{{H}_{2}}S\] done clear
  D)
  \[{{H}_{2}}O>{{H}_{2}}Se>{{H}_{2}}Te>{{H}_{2}}S\] done clear
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• question_answer7)
  Which of the following statement is correct about the hydride of group 16 elements?
  A)
  Order of acidic strength is \[{{H}_{2}}O<{{H}_{2}}S<{{H}_{2}}Se<{{H}_{2}}Te\] done clear
  B)
  Order of thermal stability is \[{{H}_{2}}O>{{H}_{2}}S>{{H}_{2}}Se>{{H}_{2}}Te\] done clear
  C)
  Order of melting and boiling points is \[{{H}_{2}}O>{{H}_{2}}Te>{{H}_{2}}Se>{{H}_{2}}S\] done clear
  D)
  All of the above done clear
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• question_answer8)
  Ozone on reacting with KI in neutral medium produces
  A)
  \[KI{{O}_{3}}\] done clear
  B)
  \[KOH\] done clear
  C)
  \[KCl\]               done clear
  D)
  \[K{{O}_{2}}\] done clear
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• question_answer9)
  Hot cone. \[{{H}_{2}}S{{O}_{4}}\] acts as moderately strong oxidizing agent. It oxidises both metals and non-metals. Which of the following element is oxidised by cone. \[{{H}_{2}}S{{O}_{4}}\] in to two gaseous products?
  A)
  Cu                    done clear
  B)
  S done clear
  C)
  C                      done clear
  D)
  Zn done clear
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• question_answer10)
  In \[S{{O}_{3}}\] molecule, 3 oxygen atoms are attached to sulphur atom through double bonds. Hence, the molecules consist \[3\pi \]-bonds. The types of pi-bonds present in \[S{{O}_{3}}\] molecule are
  A)
  All \[p\pi \]-\[p\pi \] bonds done clear
  B)
  one \[p\pi \]-\[p\pi \] and two \[p\pi \]-\[p\pi \] bonds. done clear
  C)
  one \[p\pi \]-\[p\pi \] and one \[p\pi \]-\[p\pi \] bonds done clear
  D)
  two \[p\pi \]-\[p\pi \] and one \[p\pi \]-\[p\pi \] bonds done clear
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• question_answer11)
  Bleaching of a fabric cloth is done using A and excess of chlorine is removed using B. A and B are
  A)
  \[CaOC{{l}_{2}}\], \[N{{a}_{2}}S{{O}_{3}}\] done clear
  B)
  \[N{{a}_{2}}S{{O}_{3}}\],\[CaOC{{l}_{2}}\] done clear
  C)
  \[CaC{{l}_{2}}\], \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\]   done clear
  D)
  \[CaOC{{l}_{2}}\], \[N{{a}_{2}}{{S}_{2}}{{O}_{2}}\] done clear
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• question_answer12)
  Which of the following statement is incorrect?
  A)
  SRP values of halogens \[{{X}_{2}}(g){{X}^{-}}:\] \[{{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}\] done clear
  B)
  Boiling points of \[{{I}_{2}}>B{{r}_{2}}>C{{l}_{2}}>{{F}_{2}}\] done clear
  C)
  Bond dissociation enthalpy of \[C{{l}_{2}}>{{F}_{2}}>B{{r}_{2}}>{{I}_{2}}\] done clear
  D)
  Reducing power of \[{{I}^{-}}>B{{r}^{-}}>C{{l}^{-}}>{{F}^{-}}\] done clear
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• question_answer13)
    Regarding the properties of hydrogen halides, which is wrong order?
  A)
  Percentage of ionic character HF>HI>HBr>HCl done clear
  B)
  Boiling point order HF > HI > HBr > HCl done clear
  C)
  Acidic nature HI > HBr > HCl > HF done clear
  D)
  Melting point order HI > HF > HBr > HCl done clear
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• question_answer14)
  Ammonia and chlorine are made to react. If ammonia is in excess, products formed are A and B. and when chlorine is in excess the products are C and D, A, B, C and D respectively are
  A)
  \[NC{{l}_{3}}\], HCl  and \[{{N}_{2}}\], \[N{{H}_{4}}Cl\] done clear
  B)
  \[{{N}_{2}}\], \[N{{H}_{4}}Cl\] and  \[NC{{l}_{3}}\], HCl done clear
  C)
  \[{{N}_{2}}\], HCl  and \[{{N}_{2}}\], \[N{{H}_{4}}Cl\] done clear
  D)
  \[{{N}_{2}}\], \[N{{H}_{4}}Cl\] and  \[NC{{l}_{3}}\], HCl done clear
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• question_answer15)
  Which compound is prepared by the following reaction? \[\underset{(2\,:\,1\,\,\text{volume}\,\,\text{ratio})}{\mathop{Xe\,\,+\,\,\,{{F}_{2}}}}\,\xrightarrow[673K]{Ni}\] (2 :1 volume ratio)
  A)
  \[Xe{{F}_{4}}\] done clear
  B)
  \[Xe{{F}_{2}}\] done clear
  C)
  \[Xe{{F}_{6}}\]             done clear
  D)
  None of these done clear
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• question_answer16)
  The number of (\[p\pi \]-\[p\pi \]) \[\pi \]-bonds present in \[Xe{{O}_{3}}\] and \[Xe{{O}_{4}}\] respectively are
  A)
  3 and 2 done clear
  B)
  2 and 3 done clear
  C)
  4 and 2 done clear
  D)
  3 and 4 done clear
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• question_answer17)
  \[{{\left[ HXe{{O}_{4}} \right]}^{-}}=O{{H}^{-}}\to \left[ X \right]+\left[ Y \right]+{{O}_{2}}+{{H}_{2}}O\]The products [X] and [Y] in unbalanced reaction are
  A)
  \[{{\left[ Xe{{O}_{6}} \right]}^{4-}}\]and Xe done clear
  B)
  \[{{\left[ Xe{{O}_{6}} \right]}^{4-}}\]and \[Xe{{O}_{3}}\] done clear
  C)
  \[Xe{{O}_{3}}\] and Xe done clear
  D)
  \[{{H}_{2}}Xe{{O}_{4}}\]and Xe done clear
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• question_answer18)
  Which one of the following reaction of xenon compounds is not feasible?
  A)
  \[Xe{{O}_{3}}+6HF\to Xe{{F}_{6}}+{{H}_{2}}O\] done clear
  B)
  \[3Xe{{F}_{4}}+6{{H}_{2}}O\to 2Xe+Xe{{O}_{3}}+12HF+1.5{{O}_{2}}\] done clear
  C)
  \[2Xe{{F}_{2}}+2{{H}_{2}}O\to 2Xe+4HF+{{O}_{2}}\] done clear
  D)
  \[Xe{{F}_{6}}+RbF\to Rb[Xe{{F}_{7}}]\] done clear
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• question_answer19)
  The compound that attacks Pyrex glass is
  A)
  \[Xe{{F}_{2}}\] done clear
  B)
  \[Xe{{F}_{4}}\] done clear
  C)
  \[Xe{{F}_{6}}\] done clear
  D)
  \[Xe{{F}_{4}}\] done clear
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• question_answer20)
  Identify the correct sequence of increasing number of \[\pi \]-bonds in structure of following molecules. (I) \[{{H}_{2}}{{S}_{2}}{{O}_{6}}\]     (II)\[{{H}_{2}}S{{O}_{3}}\]  (III)\[{{H}_{2}}{{S}_{2}}{{O}_{5}}\]
  A)
  I, II, III  done clear
  B)
  II, III, I done clear
  C)
  II, I, III  done clear
  D)
  I, III, II done clear
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• question_answer21)
  How many moles of \[P{{H}_{3}}\] gas is produced when 1 mole of calcium phosphide reacts with excess of water?
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• question_answer22)
  The general formula for polythionic acid series is \[{{H}_{2}}{{S}_{N}}{{O}_{6}}\] where n = 1 to 6. What is the value of n for pentathionic acid?
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• question_answer23)
  Number of chemicals that produce dioxygen on heating \[KCl{{O}_{3}}\],\[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\],\[N{{H}_{4}}N{{O}_{3}}\],\[KMn{{O}_{4}}\], \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\],\[{{H}_{2}}{{O}_{2}}\],\[P{{b}_{3}}{{O}_{4}}\],\[N{{H}_{4}}N{{O}_{2}}\]
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• question_answer24)
  In the structure of \[Xe{{F}_{2}}\] .\[2Sb{{F}_{5}}\] in solid state how many types of Xe-F bond lengths are present?
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• question_answer25)
  A list of species having the formula \[X{{Z}_{4}}\] is given below. Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is
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