Question 1

What type of intermolecular forces are due to the attraction between dipoles of N-H bonds?

Accepted Answer

hydrogen bond

Question 2

How many $$sp^3$$, $$sp^2$$, and $$sp$$ hybrid orbitals are in the molecule below, respectively?

$$\mathrm{H_3C-CH=CH-CH_3$}$$

Accepted Answer

6, 4, 2

Question 3

Which of the following boils at the highest temperature?

Accepted Answer

$$\mathrm{C_5H_{12}}$$

Question 4

Rank the following in terms of First Ionization Energy from smallest to largest: Ne, Ar, Kr, Cs.

Accepted Answer

Cs \u003c Kr \u003c Ar \u003c Ne

Question 5

Element X occurs naturally to the extent of 20.0% $$^{12}X$$ and 80.0% $$^{13}X. $$The atomic mass of X is nearest:

Accepted Answer

12.8

Question 6

What is the valence configuration for the element in Period 3, Group 7A?

Accepted Answer

$$3s^2$$ $$3p^5$$

Question 7

The maximum number of electrons that can occupy an orbital labeled $$f_{xyz} is$$:

Accepted Answer

2

Question 8

When alpha particles were shot at a metal foil target to probe the structure of the atom, most of the particles passed through without any deflection in path. Some particles were deflected at large angles. This indicated to Rutherford that:

Accepted Answer

The atoms of the metal were mostly empty space

Question 9

What is the oxidation number for chromium in $$\mathrm{Cr_2O_7$$^{2-}$$}$$?

Accepted Answer

+6

Question 10

What are the oxidation numbers for Br in $$\mathrm{Br_2$}$$, K in $$\mathrm{K^+}$$, and F in $$\mathrm{LiF}$$?

Accepted Answer

0, +1, -1

Question 11

An atom of Fe has two 4s electrons and six 3d electrons. How many unpaired electrons would there be in an $$\mathrm{Fe$$^{2+}$$}$$ ion?

Accepted Answer

Four

Question 12

Which of these is/are paramagnetic? $$\mathrm{Ti$$^{4+}$$}$$, $$\mathrm{Fe$$^{2+}$$}$$, $$\mathrm{Zn^0$}$$

Accepted Answer

$$\mathrm{Fe$$^{2+}$$}$$ only

Question 13

The molecule $$\mathrm{ML_4$}$$ consists of 4 single bonds and 2 lone pairs. What molecular geometry is it expected to assume?

Accepted Answer

Square planar

Question 14

What type of hybrid orbitals are used in $$\mathrm{CH_3CH_3}$$?

Accepted Answer

$$sp^3$$

Question 15

A system absorbs 500 kJ of heat and does 20 kJ of work. Determine $$\Delta E.$$

Accepted Answer

+480 kJ

Question 16

How many protons, electrons, and neutrons are in an atom of $$^{131}_{53}I$$?

Accepted Answer

p=53, n=78, e=53

Question 17

Which species is represented by the following? $$p^+ = 25$$, $$n = 27$$, $$e^- = 23$$

Accepted Answer

$$\mathrm{Mn$$^{2+}$$}$$

Question 18

The correct way to name the compound $$\mathrm{$$TiCl_4$$} is$$:

Accepted Answer

titanium (IV) chloride

Question 19

The correct formula for the compound ammonium sulfate is:

Accepted Answer

$$(\mathrm{NH_4$})_2SO_4$$

Question 20

Which of the following, when mixed, will yield a precipitate?

Accepted Answer

$$\mathrm{$$FeCl_2$$} + \mathrm{NaOH}$$

General Chemistry: Key Concepts and Practice Questions

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