1
IIT-JEE 2010 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0.75
The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and and alkyne
A
BrCH2CH2CH2CH2CH3 and CH2CH2C $$\equiv$$ CH
B
BrCH2CH2CH3 and CH3CH2CH2C $$\equiv$$ CH
C
BrCH2CH2CH2CH2CH3 and CH3C $$\equiv$$ CH
D
BrCH2CH2CH2CH3 and CH3CH2C $$\equiv$$ CH
2
IIT-JEE 2010 Paper 1 Offline
MCQ (Single Correct Answer)
+1
-0.25
The bond energy (in kcal mol-1) of a C-C single bond is approximately
A
1
B
10
C
100
D
1000
3
IIT-JEE 2010 Paper 1 Offline
MCQ (Single Correct Answer)
+4
-1
The concentration of potassium ions inside a biological cell is at least twenty times higher than the outside. The resulting potential difference across the cell is important in several processes such as transmission of nerve impulses and maintaining the ion balance. A simple model for such a concentration cell involving a metal M is :
M(s) | M+ (aq ; 0.05 molar) || M+ (aq ; 1 molar) | M(s)
For the above electrolytic cell the magnitude of the cell potential | Ecell | = 70 mV.

For the above cell :
A
Ecell < 0 ; $$\Delta G > 0$$
B
Ecell > 0 ; $$\Delta G < 0$$
C
Ecell < 0 ; $$\Delta G^o > 0$$
D
Ecell > 0 ; $$\Delta G^o > 0$$
4
IIT-JEE 2010 Paper 1 Offline
MCQ (Single Correct Answer)
+4
-1
The concentration of potassium ions inside a biological cell is at least twenty times higher than the outside. The resulting potential difference across the cell is important in several processes such as transmission of nerve impulses and maintaining the ion balance. A simple model for such a concentration cell involving a metal M is :
M(s) | M+ (aq ; 0.05 molar) || M+ (aq ; 1 molar) | M(s)
For the above electrolytic cell the magnitude of the cell potential | Ecell | = 70 mV.

If the 0.05 molar solution of M+ is replaced by a 0.0025 molar M+ solution, then the magnitude of the cell potential would be :
A
35 mV
B
70 mV
C
140 mV
D
700 mV
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