1 ) The reaction is spontaneous , if the cell potential is ( + ve ) , by this reaction will proceed in . . . . . . . . . . . . . . . ,
A ) Forward direction , B
) Reverse direction ,
C ) Stop , D
) None of these ,
Correct
Answer : - A ) Forward direction ,
2
) A + B = product , r
= k[A][B] . If B is taken in excess , then this
reaction will be . . . . . . . . . . . . . . . ,
A ) 1st order reaction , B ) 2nd
order reaction ,
C ) 3rd order reaction , D ) None of these
,
Correct
Answer : - A ) 1st order reaction ,
Because ,
r = k[A][B]° ( when B is taken
in excess and as B is taken constant ) .
3
) In normal excited state , the electron can reside for . . . . . . . . . . . . . . . ( 10-3
sec ) .
4
) The minimum energy in ( ev ) required
to strip off ten times ionized sodium atom , ( I.e z = 11 ) of its last electron is ?
A ) 0 ev , B ) -13.6
× 11² ( ev ),
C ) (-13.6 × 11²)/22 ( ev ),
D ) None of these ,
Correct
Answer : -
Solution
: -
Formula
: -
E
= (-13.6 z² ) / n² ,
E
= (-13.6 × 11²) / 1² ,
E
= -13.6 × 11² ( ev ), Answer .
5
) Mechanical work for gasous system is also known as . . . . . . . . . . . . . . . . . ( Pressure
- volume work ) .
Because they undergoes expansion ,
contractions with change of pressure .
6
) which one have same no. of protons , electrons , neutrons ?
A ) N2 and CO2 . B ) N2 and CO .
C ) N3 and CO . D ) None of these
,
Correct
Answer : - B ) N2 and CO .
7
) High pH means solution is . . . . . . . . . . . . . . . ,
A ) Acidic , B ) Basic ,
C ) Neutral , D ) None of these ,
Correct
Answer : - B ) Basic ,
8
) High pOH means solution is . . . . . . . . . . . . . . . . ,
A ) Acidic , B ) Basic ,
C ) Neutral , D ) None of these ,
Correct
Answer : - A ) Acidic ,
9
) Idea of pH and pOH is given by . . . . . . . . . . . . . . . . . . ,
A ) Mosley , B
) Sorenson ,
C ) J Thomson , D ) None of these ,
Correct
Answer : - B ) Sorenson ,
10
) According to le-chartelier principle ,
as the concentration of products increase , the reaction proceeds in . . . . . . . . . . . . . . . . . ,
A ) Forward direction , B
) Backwards direction ,
C ) Stops , D
) None of these ,
Correct Answer : - B ) Backwards direction ,
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