Question

Which of the following statements is/are wrong?

• A. Zeolites are hydrated aluminosilicates which can be used as shape-selective catalysts
• B. Enzymes show maximum activity when pH is either very low or very high
• C. Enzymes shows increasing activity at room temperature $({20}^{o}C-{25}^{o}C)$.
• D. Chemically, all enzymes are globular proteins

Answer 1

Answer: (A), (B)

The correct options are
A Zeolites are hydrated aluminosilicates which can be used as shape-selective catalysts
B Enzymes show maximum activity when pH is either very low or very high

(A) Zeolites are hydrated aluminosilicates. They are used as shape-selective catalysts. Zeolites are not used as such but are first heated in a vacuum so that the water of hydration is lost.

Hence, option A is correct.

(B) Enzymes show maximum activity at pH $7.4$ which is close to physiological pH.
Hence, option B is correct.

(C) Enzymes show maximum activity at $37$ ${}^{o}C$.
Hence, option C is incorrect.

(D) Chemically, all enzymes are globular proteins.
Hence, option D is incorrect.