A cell, with cell constant 0.4 cm-1, has the resistance of 40 ohm of a 0.01 M solution of an electrolyte, then the molar conductivity in ohm-1 cm2 mol-1 will be
104
103
102
1
If the standard elelctrode potential for the cell Zn | Zn2+ (aq) || Cu2+ (aq) | Cu is 1.10 V, then the maximum work done by this cell will be
-106.15 kJ
-212.30 kJ
-318.45 kJ
-424.60 kJ
2A → B + C
It would be a zero order reaction when
the rate of reaction is proportional to square of concentration of A
the rate of reaction remains same at any concentration of A
the rate remains unchanged at any concentration of B and C
the rate of reaction doubles if concentration of B is increased to double
The reaction A → B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 h. What is the time taken for conversion of 0.9 mole of A to produce 0.675 mole of B?
1 h
0.5 h
0.25 h
2 h
The structure of ionic compound with Schottky defects has
same number of cationic and anionic vacancies
anionic vacancy and interstitial anion
cationic vacancies
cationic vacancies and interstitial cation
A.
same number of cationic and anionic vacancies
It is an ionic crystal of the type AB, equal number of cations and anions are missing from their lattice sites so that the electrical neutrality is maintamed, it is called Schottky defect.
If a pentavalent impurity is mixed in the crystal-lattice of germanium then the semiconductor formed will be
p-type semiconductor
n-type semiconductor
(a) and (b) both
None of the above
A compound formed by elements X and Y crystallises in a cubic structure in which the X atoms are at the comers of a cube and the Y atoms are at the face centres. The formula of the compound is
XY3
X3Y
XY
XY2