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CBSE Class 12-science Answered

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Asked by jain.pradeep | 26 Feb, 2020, 10:00: AM
answered-by-expert Expert Answer
Order of atomic size increases and electronegativity decreases from top to bottom in a group.
S<Se<O
 
So, acidic strength decreases in this order-
 
H2SO4 >H2SeO4 >H2TeO4
Answered by Ravi | 26 Feb, 2020, 11:52: AM

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CBSE 12-science - Chemistry
the sulphide which is insoluble in dilute nitric acid is
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CBSE 12-science - Chemistry
SF6 exist not OF6. Why?
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CBSE 12-science - Chemistry
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Asked by jain.pradeep | 26 Feb, 2020, 10:00: AM
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CBSE 12-science - Chemistry
The incorrect order of decreasing oxidation number of S in compounds is: H2 S2 O7 > Na2 S4 O6 > Na2 S2 O3 > S8 H2 S O5 > H2 S O3 > S Cl2 > H2 S S O3 > S O2 > S8 > H2 S H2 S O4 > S O2 > H2 S > H2 S2 O8
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CBSE 12-science - Chemistry
Why is SF6 not easily hydrolysed by water ?
Asked by narayanankunjunni | 14 Feb, 2019, 11:16: AM
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CBSE 12-science - Chemistry
A hydride of gr 16 element is a gas and acts as a reducing agent when reacted with SO2. It has a smell of rotten eggs and is used in qualitative analysis. It forms a black ppt with Ni2+ in basic medium. It also forms a black ppt with lead acetate solution. Identify the gas and write the equations involved.
Asked by lekhakarthikeyan | 28 Aug, 2018, 04:01: AM
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CBSE 12-science - Chemistry
  The correct order of S—S bond length in following oxyanions is : (I) S2O42–      (II) S2O52–      (III) S2O6–2
Asked by Atulcaald | 18 May, 2018, 01:13: AM
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CBSE 12-science - Chemistry
What are the allotropic forms of sulphur?
Asked by Topperlearning User | 07 Jun, 2016, 10:50: AM
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CBSE 12-science - Chemistry
Mention some  uses of sulphuric acid.
Asked by Topperlearning User | 07 Jun, 2016, 10:54: AM
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CBSE 12-science - Chemistry
Draw the structure of Sulphurous acid.
Asked by Topperlearning User | 07 Jun, 2016, 10:54: AM
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