NH3(g) + HCl(g) → NH4Cl(s). The entropy change in the system below is?
A. negative B. indeterminate C. positive D. zero Correct Answer: Option A – negative
In which of the following reactions has the oxidation number of nitrogen increased?
A. 2NO(g) + Br2(l) → 2NOBr(l) B. 2NO(g) + O2(g) → 2NO2(g) C. FeSO4(aq) + NO(g) → Fe(NO)SO4(s) D. 2NO(g) + Cl2(g) → 2NOCl(l) Correct Answer: Option B – FeSO4(aq) + NO(g) → Fe(NO)SO4(s)
As the concentration of an electrolyte reduces; the conductivity?
A. reduces to zero B. decreases C. increase D. is unaffected Correct Answer: Option C = increase
In the equation below; copper is?
3Cu(s) + 8HNO3(aq) → 3Cu(NO3)2(aq) + 4H2O(l) + 2NO(g) A. an electron acceptor B. a base C. an oxidizing agent D. a reducing agent Correct Answer: Option D – a reducing agentProducts
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