Pick out the correct statement?

Chemical Reaction 09/10/2020

A. In catalytic reactions, the catalyst reacts with the reactants
B. A catalyst initiates a chemical reaction
C. A catalyst lowers the activation energy of the reacting molecules
D. A catalyst cannot be recovered chemically unchanged at the end of the chemical reaction

Related Mcqs:

    The rate expression for a heterogeneous catalytic reaction is given by, – rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) ?
    A. E B. E + ΔHA C. E + ΔHA – ΔHR) D. ΔHA + ΔHR...
    If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst___________________?
    A. Porosity is very important B. Porosity is of less importance C. Internal surface area is utilised efficiently D. None of these...
    The ‘E’ curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt _____________________?
    A. At the inlet B. At the outlet C. In the reactor D. Averaged over the inlet and outlet...
    The reaction in which one of the products of reaction acts as a catalyst is called a/an ______________ reaction?
    A. Biochemical B. Photochemical C. Catalytic D. Autocatalytic...
    Helium-mercury method can be used to determine the _____________ of the catalyst particle?
    A. Pore volume B. Solid density C. Porosity D. All A., B., & C....

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