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CBSE Class 11-science Answered

Predict if gold can be dissolved in 1M HCl solution. If hydrogen gas is passed through gold salt solution, will metallic gold be precipitated or not?
Asked by janasati | 28 Feb, 2011, 04:26: AM
answered-by-expert Expert Answer
Because hydrogen is above the gold in the electrochemical series the gold is precipitated.(assume)
Answered by | 03 Mar, 2011, 11:36: AM

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CBSE 11-science - Chemistry
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CBSE 11-science - Chemistry
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CBSE 11-science - Chemistry
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CBSE 11-science - Chemistry
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Asked by sulaikhasulu393 | 07 Jun, 2020, 10:51: PM
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CBSE 11-science - Chemistry
straight H subscript 2 straight O plus Fe plus straight X rightwards arrow RUST space find space straight x
Asked by kalvedant789 | 25 May, 2020, 08:17: PM
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CBSE 11-science - Chemistry
For the reaction, MnO4⊝+ C2O42− → MnO2+ CO2 ; The simplest mole ratio of MnO4⊝ and C2O42− in which they react is
Asked by debjit_dm | 04 May, 2020, 03:08: PM
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CBSE 11-science - Chemistry
(i) Balance the following equations by oxidation number method: (1) Cu + HNO3 → Cu (NO3)2 + NO2 + H2O) (2) K2Cr2O7 + HCl → KCl + CrCl3 + H2O + Cl2 (ii) Give reasons for the following: (1) HNO3 acts only as an oxidising agent while HNO2 can act both as a reducing agent and an oxidising agent. (2) Chlorine liberates iodine from KI solution. How will you convert the following? (Give balanced equation.) (1) Sodium acetate to methane Find the oxidation number of: (1) S in Na2S4 O6 2) S in S subscript 4 space O subscript 6 superscript 2 minus end superscript
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CBSE 11-science - Chemistry
H2O2+Fe2+=H2O +Fe3+ , give ion exchange method 
Asked by Punshibakhuraijam2015 | 22 Sep, 2019, 08:40: PM
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CBSE 11-science - Chemistry
It takes 0.15 mole of ClO- to oxidize 12.6g of chromium oxide of a specific formula to Cr2O7 ^ 2-.ClO- became Cl-.The formula of the oxide is atomic weight Cr- 52, O- 16) (a)CrO3 (b)CrO2 (c)CrO4 (d)CrO
Asked by Balbir | 30 Jun, 2019, 03:45: PM
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