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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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