Chemistry Test Inorganic Chemistry 3

Question 1

Which element is the most electronegative?

Accepted Answer

Fluorine

Answer

Fluorine is the most electronegative element on the Pauling scale with a value of 3.98.

Question 2

Which of the following compounds exhibits the highest lattice energy?

Accepted Answer

MgO

Answer

MgO has the highest lattice energy due to the high charge (+2/-2) and small ionic radii of Mg2+ and O2-.

Question 3

Identify the conjugate base of H2PO4-:

Accepted Answer

HPO42-

Answer

The conjugate base of H2PO4- is HPO42-, formed by losing one proton.

Question 4

Which d-block element has the electron configuration [Ar]3d5 4s1?

Accepted Answer

Chromium

Answer

Chromium has configuration [Ar]3d5 4s1 due to the extra stability of a half-filled d subshell.

Question 5

What shape does the ClF3 molecule adopt?

Accepted Answer

T-shaped

Answer

ClF3 has 3 bonding pairs and 2 lone pairs, resulting in a T-shaped molecular geometry.

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