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${}_4^{3-}$ > SO${}_4^{2-}$ > Cl^-

• Cl > SO${}_4^{2-}$ > PO${}_4^{3-}$

• Al³⁺ > Ba²⁺ > Na⁺

33.

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 ${}_{92}{}^{238}$U to ${}_{82}{}^{206}$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

Water is oxidized to oxygen by :

• ClO₂

• KMnO₄

• H₂O₂

• Fluorine

The magnetic moment µ, of transition metals is related to the number of unpaired electrons, n as:

• μ = $\sqrt{\mathrm{n} \left(\mathrm{n} + 2\right)}$

• 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

The compound that does not answer iodoform test is :

• ethanol

• ethanal

• methanol

• propanone

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