Test number 4 - Ace the SAT II Chemistry

Questions 1-3 refer to the following elements:

(A) O

(B) N

(C) F

(D) Ne

(E) Na

1. Which element has the largest atomic radius?

(A) O

(B) N

(C) F

(D) Ne

(E) Na

2. Which element has the highest electronegativity?

(A) O

(B) N

(C) F

(D) Ne

(E) Na

3. Which element has the lowest ionization energy?

(A) O

(B) N

(C) F

(D) Ne

(E) Na

4. Which element can form 5 different oxides?

(A) O

(B) N

(C) F

(D) Ne

(E) Na

5. Which response includes true statements concerning the characteristics of ionic compounds?

I they have low melting points
II they are soluble in water
III their aqueous solution are very good conductors of electricity
IV Are soluble in protic solvents

(A) I and III
(B) II and III
(C) II and IV
(D) III and IV
(E) II, III, and IV

6. Which of the following is the density of oxygen at STP?

(A) 1.0 g/L
(B) 1.2 g/L
(C) 1.4 g/L
(D) 16g/L
(E) 32g/L

7. Consider the reaction (all substances are gaseous)

4NH3 + 5O2 <=> 4NO + 6H2O

What would happen if NO were added?

(A) The equilibrium will shift to the right
(B) The equilibrium will shift to the left
(C) The equilibrium will remain the same
(D) The reaction will not take place any more
(E) None of the above

8. An atom of sodium has a mass number of 23 and an atomic number of 11
How many neutrons does it have?

(A) 11
(B) 12
(C) 23
(D) 44
(E) can not be determined

9. An atom of fluorine has a mass number of 19 and an atomic number of 9
How many electrons does it have?

(A) 9
(B) 10
(C) 19
(D) 28
(E) can not be determined

10. A substance contains 55 grams of oxygen 65 grams of carbon and 30 grams of hydrogen. How many grams of oxygen will be in 200 grams substance?

(A) 27.5 g
(B) 55 g
(C) 73.33 g
(D) 110 g
(E) Not enough information.