STRAIGHTERLINE CHEMISTRY CORE MAIN REVIEW QUESTIONS AND ANSWERS SURE A.pdf

STRAIGHTERLINE CHEMISTRY CORE MAIN
REVIEW QUESTIONS AND ANSWERS SURE A+
✔✔The effective nuclear charge for an atom is less than the actual nuclear charge due
to
Select one:
a. shielding.
b. penetration.
c. paramagnetism.
d. electron-pair repulsion.
e. relativity. - ✔✔a. shielding.

✔✔Which pair of ions exhibits the greatest attractive force between them?
Select one:
a. Na+ and Cl-
b. Ca2+ and Cl-
c. Na+ and S2-
d. Al3+ and Mg2+
e. Mg2+ and O2- - ✔✔e. Mg2+ and O2-

✔✔Which of the following is a basic oxide?

Select one:

, a. P4O10
b. MgO
c. Al2O3
d. SO2
e. Cl2O7 - ✔✔b. MgO

✔✔Which of these compounds is most likely to be covalent?
Select one:
a. Rb2S
b. SrCl2
c. CS2
d. CaO
e. MgI2 - ✔✔c. CS2

✔✔In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal
charge on the central iodine atom is

Select one:
a. 2.
b. 1.
c. 0.
d. -1.
e. -2. - ✔✔a. 2.

✔✔Which molecule has the largest dipole moment?

Select one:
a. HF
b. HI
c. HBr
d. HCl
e. All of the molecules have the same dipole moment. - ✔✔a. HF

✔✔In which of the following species does the central atom violate the octet rule?

Select one:
a. CH4
b. SF4
c. PCl4+
d. CCl3+
e. NH3 - ✔✔b. SF4

✔✔Which of these ionic solids would have the largest lattice energy?
Select one:
a. NaCl