Catalysis | MCQs

Explanation

Amylase is an enzyme that catalyzes the hydrolysis of starch into sugars.

All amylases are glycoside hydrolases.

It is used in breadmaking.

Additional information:

Protease: 

is an enzyme that catalyzes proteolysis.

Lipase:

Is an enzyme that catalyzes the hydrolysis of fats.

Peptidase:

is an enzyme that breaks down peptides into amino acids.

Explanation

Nascent hydrogen refers to atomic hydrogen (H), which is highly reactive and short-lived.

It is usually produced in situ during chemical reactions.

It is more reactive than molecular hydrogen (H₂).

Explanation

Explanation

Thermite is a redox reaction that happens on its own.

It doesn't need a catalyst.

Haber's process, Contact process, and Ostwald's process need a catalyst.

Explanation

In a reversible reaction, a catalyst reduces the time to reach equilibrium by increasing the rate of both forward and reverse reactions. 

Explanation

Raney nickel is prepared by treating a nickel-aluminum (Ni-Al) alloy with concentrated NaOH.

This process removes aluminum, leaving behind porous nickel, which acts as an excellent hydrogenation catalyst.

Explanation

A biocatalyst is a protein that speeds up a biochemical reaction in a living organism, and the term "enzyme" specifically refers to a protein with this function. 

Explanation

Chemical reactions that take place inside living things are called biochemical reactions. 

An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process.

Explanation

Most catalytic elements or their compounds belong to the d-block. 

d-block elements (transition metals):

These elements are known for their ability to participate in a wide variety of chemical reactions due to the availability of their d-orbitals. This allows them to act as catalysts by facilitating the formation of intermediate compounds and lowering the activation energy of reactions. 

Explanation

The induced fit model of enzyme activity suggests that an enzyme can catalyze related reactions.

The enzyme's active site can undergo conformational changes to accommodate and catalyze similar substrates.

It enhancing the enzyme's versatility.