Catalyst and Catalysis
CHXII05:SURFACE CHEMISTRY

320706 Platinised asbestos helps in the formation of \(\mathrm{SO}_{3}\) from \(\mathrm{SO}_{2}\) and \(\mathrm{O}_{2}\). But, if even a small amount of \(\mathrm{As}_{2} \mathrm{O}_{3}\) is present the platinised asbestos does not help in the formation of \(\mathrm{SO}_{3} . \mathrm{As}_{2} \mathrm{O}_{3}\) acts here as a/an

1 Poison
2 Negative catalyst
3 Positive catalyst
4 Auto catalyst
CHXII05:SURFACE CHEMISTRY

320707 Decomposition of urea into \(\mathrm{NH}_{3}\) and \(\mathrm{CO}_{2}\) is followed by the action of enzyme

1 Urease
2 Pepsin
3 Invertase
4 All of these
CHXII05:SURFACE CHEMISTRY

320708 Enzymes are made up of

1 Edible proteins
2 Proteins with specific structure
3 Nitrogen containing carbohydrate
4 Carbohydrates
CHXII05:SURFACE CHEMISTRY

320709 The characteristics of an enzyme are given below.
I. Enzymes are highly efficient.
II. Enzymes are highly specific in nature.
III. At optimum \(\mathrm{pH}\), they are less active.
IV. Enzyme activity is increased by the activator and co-enzymes.
Which of the above statements are correct?

1 I, II and III
2 I, II and IV
3 II, III and IV
4 II and III
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHXII05:SURFACE CHEMISTRY

320706 Platinised asbestos helps in the formation of \(\mathrm{SO}_{3}\) from \(\mathrm{SO}_{2}\) and \(\mathrm{O}_{2}\). But, if even a small amount of \(\mathrm{As}_{2} \mathrm{O}_{3}\) is present the platinised asbestos does not help in the formation of \(\mathrm{SO}_{3} . \mathrm{As}_{2} \mathrm{O}_{3}\) acts here as a/an

1 Poison
2 Negative catalyst
3 Positive catalyst
4 Auto catalyst
CHXII05:SURFACE CHEMISTRY

320707 Decomposition of urea into \(\mathrm{NH}_{3}\) and \(\mathrm{CO}_{2}\) is followed by the action of enzyme

1 Urease
2 Pepsin
3 Invertase
4 All of these
CHXII05:SURFACE CHEMISTRY

320708 Enzymes are made up of

1 Edible proteins
2 Proteins with specific structure
3 Nitrogen containing carbohydrate
4 Carbohydrates
CHXII05:SURFACE CHEMISTRY

320709 The characteristics of an enzyme are given below.
I. Enzymes are highly efficient.
II. Enzymes are highly specific in nature.
III. At optimum \(\mathrm{pH}\), they are less active.
IV. Enzyme activity is increased by the activator and co-enzymes.
Which of the above statements are correct?

1 I, II and III
2 I, II and IV
3 II, III and IV
4 II and III
CHXII05:SURFACE CHEMISTRY

320706 Platinised asbestos helps in the formation of \(\mathrm{SO}_{3}\) from \(\mathrm{SO}_{2}\) and \(\mathrm{O}_{2}\). But, if even a small amount of \(\mathrm{As}_{2} \mathrm{O}_{3}\) is present the platinised asbestos does not help in the formation of \(\mathrm{SO}_{3} . \mathrm{As}_{2} \mathrm{O}_{3}\) acts here as a/an

1 Poison
2 Negative catalyst
3 Positive catalyst
4 Auto catalyst
CHXII05:SURFACE CHEMISTRY

320707 Decomposition of urea into \(\mathrm{NH}_{3}\) and \(\mathrm{CO}_{2}\) is followed by the action of enzyme

1 Urease
2 Pepsin
3 Invertase
4 All of these
CHXII05:SURFACE CHEMISTRY

320708 Enzymes are made up of

1 Edible proteins
2 Proteins with specific structure
3 Nitrogen containing carbohydrate
4 Carbohydrates
CHXII05:SURFACE CHEMISTRY

320709 The characteristics of an enzyme are given below.
I. Enzymes are highly efficient.
II. Enzymes are highly specific in nature.
III. At optimum \(\mathrm{pH}\), they are less active.
IV. Enzyme activity is increased by the activator and co-enzymes.
Which of the above statements are correct?

1 I, II and III
2 I, II and IV
3 II, III and IV
4 II and III
CHXII05:SURFACE CHEMISTRY

320706 Platinised asbestos helps in the formation of \(\mathrm{SO}_{3}\) from \(\mathrm{SO}_{2}\) and \(\mathrm{O}_{2}\). But, if even a small amount of \(\mathrm{As}_{2} \mathrm{O}_{3}\) is present the platinised asbestos does not help in the formation of \(\mathrm{SO}_{3} . \mathrm{As}_{2} \mathrm{O}_{3}\) acts here as a/an

1 Poison
2 Negative catalyst
3 Positive catalyst
4 Auto catalyst
CHXII05:SURFACE CHEMISTRY

320707 Decomposition of urea into \(\mathrm{NH}_{3}\) and \(\mathrm{CO}_{2}\) is followed by the action of enzyme

1 Urease
2 Pepsin
3 Invertase
4 All of these
CHXII05:SURFACE CHEMISTRY

320708 Enzymes are made up of

1 Edible proteins
2 Proteins with specific structure
3 Nitrogen containing carbohydrate
4 Carbohydrates
CHXII05:SURFACE CHEMISTRY

320709 The characteristics of an enzyme are given below.
I. Enzymes are highly efficient.
II. Enzymes are highly specific in nature.
III. At optimum \(\mathrm{pH}\), they are less active.
IV. Enzyme activity is increased by the activator and co-enzymes.
Which of the above statements are correct?

1 I, II and III
2 I, II and IV
3 II, III and IV
4 II and III