Which of the following statement is not correct?
In zero order reaction the rate of the reaction remains constant throughout
A second order reaction would become a pseudo first order reaction when one of the reactants is taken in large excess
The value of first order rate constant expends on the units of the concentration terms used
In a first order reaction the plot of log (a - x) vs time gives a straight line
The coagulating power of an electrolyte for arsenious sulphide decreases in the order :
Na+ > Al3+ > Ba2+
PO > SO > Cl-
Cl > SO > PO
Al3+ > Ba2+ > Na+
A certain metal will liberate hydrogen from dilute acids. It will react with water to form hydrogen only when the metal is heated and the water is in the form of steam. The metal is probably:
iron
potassium
copper
mercury
The number of α and β particles emitted in the chain of reactions leading to the decay of U to Pb :
8 β particles and 6 α particles
5 α particles and O β particles
8 α and 6 β particles
10 α particles and 10 β particles
C.
8 α and 6 β particles
238 = 206 + 4m
m = 8
92 = 82 + 2m - n
2m - n = 10
n = 6
α particles emitted, m = 8
β particles emitted, n = 6
The magnetic moment µ, of transition metals is related to the number of unpaired electrons, n as:
μ =
μ = n (n + 2)2
μ = n2 (n + 2)
μ = n/ (n + 2)
Wurtz's reaction involves the reduction of alkyl halide with :
Zn/ HCl
HI
Zn/ Cu couple
Na in ether
Which one of the following compound reacts with chlorobenzene to produce DDT ?
Acetaldehyde
Nitrobenzene
m-chloroacetaldehyde
Trichloroacetaldehyde
Conversion of benzaldehyde to 3-phenylprop-2-en-1-oic acid is:
Perkin condensation
Claisen condensation
oxidative addition
Aldol condensation