FREE OAT General Chemistry Questions and Answers

Question 1

Which of the following elements has the largest atomic radius?

Accepted Answer

Potassium (K)

Answer

Lithium (Li)

Answer

Carbon (C)

Answer

Fluorine (F)

Question 2

A chemical reaction has an activation energy of 50 kJ/mol. If a catalyst is added, how does this affect the reaction rate and the activation energy?

Accepted Answer

Reaction rate increases; activation energy decreases.

Answer

Reaction rate decreases; activation energy increases.

Answer

Reaction rate increases; activation energy increases.

Answer

Reaction rate decreases; activation energy decreases.

Question 3

What is the pH of a 0.01 M solution of HCl?

Accepted Answer

2

Answer

1

Answer

7

Answer

12

Question 4

Which of the following compounds exhibits hydrogen bonding?

Accepted Answer

NH₃

Answer

CH₄

Answer

H₂S

Answer

HCl

Question 5

How many moles of gas are present in a 2.0 L container at 27 °C and 2.0 atm pressure? (R = 0.0821 L·atm/(mol·K))

Accepted Answer

0.16 moles

Answer

0.08 moles

Answer

0.25 moles

Answer

0.04 moles

Question 6

What is the oxidation state of sulfur in H₂SO₄?

Accepted Answer

+6

Answer

+2

Answer

+4

Answer

-2