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Single correct option 1: the most durable metal plating on iron to protect against corrosion is (a)Ni plating (b)Cu plating (c)tin plating (d)Zn plating 2: two platinum electrodes were immersed in a soln of CuSO4 & electric current was passed through the soln. after some time it was found that the colour of CuSO4 disappeared with evolution of gas at the electrode. The colourless soln contains: (a)platinum sulphate (b)copper hydroxide (c)copper sulphate (d)sulphuric acid 3: on passing electricity on dil. H2SO4 soln the amount of the substance librated at the cathode and anode are in the ratio: (a)1:8 (b)8:1 (c)16:1 (d)1:16 4: in fused BaCl2 the electricity corresponding to charge on one mole N3- is passed. The chlorine liberated at the anode(NTP) would be: (a)22.4L (b)67.2L (c)33.6L (d)11.2L 5: which two species reacts spontaneously: (a)Cu(s) + Ag+(aq) (b)Br2(I) + Cl-(aq) (c)H2O(l) + Ca+ +(aq) (d) Au(s) + Mg2 +(aq) 6: if E0Cell for a given reaction is negative, which gives correct relationship (a)?G0>0:Keq 0:Keq>1 (c) ?G0 1 (d) ?G0 7: a zinc rod(100g) is dipped in 1L 1M soln of copper sulphate to formulate a galvanic cell. If cell gives 1 amp of current then how long it will work? (a)53.6 hrs (b)46 hrs (c)1.1 hrs (d) 24 hrs 8: if the pressure of hydrogen gas is increased from 1atm to 100 atm. Keeping the hydrogen ion conc constant at 1 M the voltage of hydrogen half cell at 250C will be (a)-0.059V (b)0.59V (c)0.0295V (d)0.118V 9:which of the following reaction is possible at anode? (a)2Cr3+ +7H2O ---?Cr2O72- +14H+ (b)F2----?2F- (c)1/2O2 +2H+ ---?H2O (d)none of these

Single correct option
1: the most durable metal plating on iron to protect against corrosion is
(a)Ni plating (b)Cu plating
(c)tin plating (d)Zn plating
2: two platinum electrodes were immersed in a soln of CuSO4 & electric current was passed through the soln. after some time it was found that the colour of CuSO4 disappeared with evolution of gas at the electrode. The colourless soln contains:
(a)platinum sulphate (b)copper hydroxide
(c)copper sulphate (d)sulphuric acid
3: on passing electricity on dil. H2SO4 soln the amount of the substance librated at the cathode and anode are in the ratio:
(a)1:8 (b)8:1 (c)16:1 (d)1:16
4: in fused BaCl2 the electricity corresponding to charge on one mole N3- is passed. The chlorine liberated at the anode(NTP) would be:
(a)22.4L (b)67.2L (c)33.6L (d)11.2L
5: which two species reacts spontaneously:
(a)Cu(s) + Ag+(aq) (b)Br2(I) + Cl-(aq) (c)H2O(l) + Ca+ +(aq) (d) Au(s) + Mg2 +(aq)
6: if E0Cell for a given reaction is negative, which gives correct relationship
(a)?G0>0:Keq<1 (b) ?G0>0:Keq>1 (c) ?G0<0:Keq>1 (d) ?G0<0:Keq<1
7: a zinc rod(100g) is dipped in 1L 1M soln of copper sulphate to formulate a galvanic cell. If cell gives 1 amp of current then how long it will work?
(a)53.6 hrs (b)46 hrs (c)1.1 hrs (d) 24 hrs
8: if the pressure of hydrogen gas is increased from 1atm to 100 atm. Keeping the hydrogen ion conc constant at 1 M the voltage of hydrogen half cell at 250C will be
(a)-0.059V (b)0.59V (c)0.0295V (d)0.118V
9:which of the following reaction is possible at anode?
(a)2Cr3+ +7H2O ---?Cr2O72- +14H+ (b)F2----?2F-
(c)1/2O2 +2H+ ---?H2O (d)none of these







Grade:12

1 Answers

Rahul Kumar
131 Points
9 years ago

Hi,

Please ask questions one by one, you will get better results in that

Regards

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