19.7 Lewis Acids and Baseso

Lewis acids are

a. Mental cations

b. Trigonal planar species

c. pentahalides of phosphorus

d. All of the above

d. All of the above

Which of the following act as a lewis acid?

a. All cations which are able to accept elections

b. Molecules With an incomplete octet

c. A molecule in which a central atom has vacant d-orbitals available

d. All of the above

d. All of the above

Lewis acids are

a. Mental cations

b. Trigonal planar species

c. pentahalides of phosphorus

d. All of the above

d. All of the above

Which of the following act as a lewis acid?

a. All cations which are able to accept elections

b. Molecules With an incomplete octet

c. A molecule in which a central atom has vacant d-orbitals available

d. All of the above

d. All of the above

in lewis acids-base reaction, the BLANK bond is formed.

covalent

Which species among the following is a lewis acid and not a brosted acid?

a. BF3

b. O2-

c. HCI

d. None of the above

a. BF3

Which of the following will act as a lewis acid?

a. Ag+

b. ROH

c. CN-

d. Both A & B

a. Ag+

In the reaction between boron trifluoride and anomia, which of the following functions as an acid, according to lewis definition?

a. Boron trifluoride

b. Ammonia

c. Nitrofen

d. None of the above

a. Boron trifluoride

Aluminum chloride acts as a strong lewis acid since:

a. AICI3 is an covalent compound

b. AICI3 is an Ionic compound.

c. AICI3 is easily hydrolyzed

d. AICI3 Is an electron deficient compound

d. AICI3 Is an electron deficient compound

Which equilibrium can be descried as an acid-base reaction using the lewis acid base definition and not using the bronsted and Lowry concept?

a. None of the above

b. NH3 +CH3COOH<=> CH3COO-+NH+4

c.4NH3+Cu2+<=>[CU(NH3)4]2+

d. NH3+H2O-->NH4+ + OH

c.4NH3+Cu2+<=>[CU(NH3)4]2+

Which of the following is not a lewis acid

a. BF3

b. SIF4

c. FeCI3

d. C2H4

d. C2H4

Which of the following statements is NOT correct?

a. A substance which can accept a pair of electrons is a base

b. A substance which can donate a pair of electrons is base

c. A substance which accept a proton in a aqueous median is a base

d. A substance which supplies OH- in an aqueous median is a base

a. A substance which can accept a pair of electrons is a base