Test Number 1.
Questions 1-3 refer to the following substances
(A)Cl2
(B)SO2
(C)CCl4
(D)HF
(E)NH4+
1. Which molecule is polar?
(A) HF
(B) SO2
(C) SO2 and CCl4
(D) SO2 and HF
(E) All of them.
2. Which molecule is an acid?
(A) NH4+
(B) HF
(C) HF and NH4+
(D) None of them
(E) All of them
3. Which molecule contains a double bond?
(A) Cl2
(B) SO2
(C) CCl4
(D) HF
(E) NH4+
4. Which molecule has a tetragonal geometry?
(A) NH4+
(B) CCl4
(C) Both CCl4 and NH4+
(D) SO2
(E) None of them
Questions 5-7 refer to the following substances
(A) CH4
(B) CH3COOH
(C) CH3CH2OH
(D) C2H2
(E) CH3OCH3
5. Which molecule(s) is/are a hydrocarbon(s)?
(A) CH4
(B) CH4 and C2H2
(C) CH3CH2OH
(D) C2H2
(E) CH3OCH3
6. Contains sp hybridised carbons.
(A) CH4
(B) CH3COOH
(C) CH3CH2OH
(D) C2H2
(E) CH3OCH3
7. If dissolved in water, has a pH < 7.
(A) CH4
(B) CH3COOH
(C) CH3CH2OH
(D) C2H2
(E) CH3OCH3
8. If x grams of S are needed to obtain 0.4 grams of SO3, how many grams of SO2 can be obtained from the same amount of S?
(A) 0.32 g
(B) 0.62 g
(C) 0.40 g
(D) 0.16 g
(E) Can not be calculated from the given data.
9. Which compound has the highest percent by mass of carbon?
(A) CH4
(B) CO2
(C) C6H6
(D) CH3OH
(E) C7H8
10. When the equation for the reaction represented below is balanced and all coefficients are reduced to lowest whole-number terms, the coefficient for Fe(s) is
…Fe(s) + …O2 => …Fe2O3 (s)
(A) 0
(B) 1
(C) 2
(D) 3
(E) 4
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15 comments:
1 D; 2 B; 3 B; 4 C;5 B;6 D;7 B;8 A;
9 C; 10 C
Anyone know why NH4+ does not count as an acid? I thought by the Bronsted theory that NH4+ was a conjugate acid.
10 should be E, no?
Who said it doesn't count as an acid?
The answer to 2 is C, both HF and NH4+.
THe first anonymous is just dumb.
1. D
2. B
3. B
4. C
5. B
6. D
7. B
8. A
9. E
10. E
What are the correct answers?
Vidur you are wrong on number 9
If you correctly calculate the percentage mass of carbon in E for problem 9, it comes out to be 91% which is less than the answer for choice C which is 92%.
9 is C
1=d;2=b;3=b;4=c;5=b;6=d;7=b;8=a;9=c; 10=e
yeeeeeeeeeee thankkkkk yoouuuuuuuuuu
DCBCBDBCCE
The correct answers are DCBCBDBACE
Victor:
"Who said it doesn't count as an acid?
The answer to 2 is C, both HF and NH4+."
And then you write, that correct answer on 2 is B, lol.
Why in 6 correct answer is D ?
In C2H2 carbons are sp2 hybridized.
How to solve number 8?
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