For a reaction, r= k(CH3COCH3)3/2 then unit of rate of reaction and rate constant respectively is
mol L-1 s-1, mol-1/2 L1/2 s-1
mol-1 L-1 s-1, mol-1/2 L-1/2 s-1
mol L-1 s-1 mol+1/2L1/2s-1
mol L s, mol+1/2 L 1/2 s
For Zn2+| Zn, = -0.76 then EMF of the cell Zn/Zn2+(+1M)|2H+ (1M)| H2(1 atm) will be
-0.76 V
0.76 V
0.38 V
-0.38 V
If t1/2 vs is a straight line graph then determine the order of reaction.
Zero order
First order
Second order
Third order
CsCl has bcc arrangement. Its unit cell edge length is 400 pm. Its inter-ionic distance is
400 pm
800 pm
100 pm
A colloidal solution is kept in dark and is illuminated by a beam of light then brightness appears at the right angle of direction of light. This effect is called
Tyndall effect
Brownian effect
Hardy- Schulze effect
none of these
Which will not form precipitation after addition of (NH4)2CO3 in presence of NH4Cl?
Mg
Ba
Sn
Sr
A.
Mg
When (NH4)2CO3 is added to salution containing NH4Cl and NH4OH, the carbonates of Ba2+, Sr2+ and Ca2+ are precipitated:
BaCl2 + (NH4)2CO3 BaCO3+ 2NH4Cl
SrCl2 +(NH4)2CO3 SrCO3 +2NH4Cl
CaCl2 +(NH4)2CO3 CaCO3+ 2NH4Cl
Which is correct order of solubility in water?
Ba(OH)2 <Mg(OH)2
BaCO3> CaCO3
CaSO4 <MgSO4
Ca(OH)2Mg(OH)2
Assertion : Rate of reaction doubles when concentration of reactant is doubled if it is a first order reaction.
Reason : Rate constant also doubles.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.