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6.

For a reaction taking place in a container in equilibrium with its surroundings, the effect of temperature on its equilibrium constant K in terms of change in entropy is described by


A) With the increase in temperature, the value of K for endothermic reaction increase because of unfavourable change in entropy of the surrounding decrease

B) With the increase in temperature, the value of K for exothermic reaction decrease because of favourable change in entropy of the surroundings decreases

C) With the increase in temperature, the value of K  for endothermic reaction increases because the entropy change of the system is negative

D) With the increase in temperature, the value of K for exothermic reaction decreases because the entropy change of the system is positive



7.

Which of the following combination will produce H2 gas?


A) Fe metal and conc. $HNO_{3}$

B) Cu metal and conc,$HNO_{3}$

C) Au metal and NaCN(aq) in the presence of air

D) Zn metal and NaOH(aq)



8.

The order of the oxidation state of the phosphorous atom in H3PO2 , H3PO4 , H3PO3  and H4P2O6 is


A) $H_{3}PO_{4}>H_{3}PO_{2}>H_{3}PO_{3}>H_{4}P_{2}O_{6}$

B) $H_{3}PO_{4}>H_{4}P_{2}O_{6}>H_{3}PO_{3}>H_{3}P_{}O_{2}$

C) $H_{3}PO_{2}>H_{3}P_{}O_{3}>H_{4}P_{2}O_{6}>H_{3}P_{}O_{4}$

D) $H_{3}PO_{3}>H_{3}P_{}O_{2}>H_{3}P_{}O_{4}>H_{4}P_{2}O_{6}$



9.

For the following cell,

       $Zn(s)\mid ZnSo_{4}(aq)\parallel CuSo_{4}(aq)\mid Cu(s)$

 when the concentration of Zn2+ is 10 times the concentration of Cu2+, the expression of ΔG  (in J mol-1) is 

 [ F is faraday constant : R is gas constant : T is temperature :E0 (cell) =1.1 V]

 


A) 2.303 RT + 1.1 F

B) 1.1 F

C) 2.303 RT-2.2 F

D) -2.2 F



10.

The order of basicity among the following compound is

1822020903_compound.JPG

1822020575_compound 1.JPG


A) II>I>IV>III

B) I>IV>III>I

C) IV>I>II>I

D) IV>I>II>III



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