SAT Question of the Day

A hydrocarbon is burned in oxygen and the ratio of moles of carbon dioxides to the moles of water obtained is 2:1. Find the hydrocarbon if it has 2 main resonance structures.

(A)CH4
(B)C2H4
(C)C2H2
(D)C6H6
(E)None of the above.

SAT Question of the Day

Consider the following reaction:
a FeS2 + b O2 = c Fe2O3 + d SO2
The ratio a/b is:

(A)0.50
(B)0.36
(C)0.44
(D)0.82
(E)other answer

Test number 8- Ace the SAT II Chemistry

1.All of the following statements about sodium acetate are true except:

(A) It is an ionic compound
(B) it is soluble in water
(C) contains carbon
(D) it is also called vinegar
(E) if dissolved in water the solution has a pH > 7

2. All of the following statements about NaBH4 are true except:


(A) it is used in organic chemistry synthesis
(B) it is a reducing agent
(C) by the catalytic decomposition of its aqueous solution, H2 is released
(D) contains 16.66 % Na in molar percent
(E) is a liquid at room temperature


3. Questions 3-6 refer to the following substances


(A) B
(B) Al
(C) Na
(D) Zn
(E) C

3. It is the main constituent of fullerenes

(A) B
(B) Al
(C) Na
(D) Zn
(E) C

4.It is an alkali metal

(A) B
(B) Al
(C) Na
(D) Zn
(E) C

5.The hydroxide of which of the following elements is acidic if dissolved in water

(A) B
(B) Al
(C) Na
(D) Zn
(E) C

6.It is a transitional element:

(A) B
(B) Al
(C) Na
(D) Zn
(E) C

7.Consider the following electronic configuration 1s2 2s2 2p6 3s2 3p6 4s2
The compound formed by this element with oxygen has the formula:

(A) MO
(B) MO2
(C) M2O
(D) M2O2
(E) M2O3

8.Consider the following acid : H3PO2.Which of the following is true?

(A) it is a monoprotic acid
(B) it is a diprotic acid
(C) it is a triprotic acid
(D) does not exist
(E) it does not present acidic properties

9.The Ksp of PbSO4 is 1x 10 ^ -8. the solubility of PbSO4 is:

(A) 10^-8
(B) 10^-1
(C) 10^-2
(D) 10^-4
(E) 10^-16


10.Which of the following bonds is intermolecular ?

(A) ionic bond
(B) covalent bond
(C) metallic bpnd
(D) hydrogen bond
(E) None of them

2.3 grams of sodium are placed into a beaker containing 500 ml HCl 0.1 M;
What is the pH of the final solution?
Note: Assume the volume of the solution remains constant.

(A)pH = 7
(B)pH = 1
(C)pH = 13
(D)The pH can not be determined using given data
(E)All answers (A-D)are wrong.

SAT Question of the Day

Cu loses an electron to form Cu+; The quantum numbers of the lost electron are:

(A)n=3 ,l=2, m= -2,-1,0,1,2 , s= -,+ 1/2
(B)n=4 ,l=0, m= 0, s = -,+ 1/2
(C)n=3 ,l=2, m= -2,-1,0,1,2, s= 0,1
(D)n=4 ,l=2, m= 1, s=-,+1/2
(E)n=3 ,l=3, m= -2,-1,0,1,2, s=+,- 1/2

SAT Question of the Day

What is the formal charge of boron in BF4-?

(A)-1
(B)0
(C)+1
(D)+3
(E)-4

Test number 7- Ace the SAT II Chemistry

1. The correct formula for calcium sulfate is:

(A) CaS
(B) Ca2S
(C) CaSO3
(D) CaSO4
(E) Ca2SO4

Questions 2-5 refer to the following substances


(A) H2O

(B) SO3

(C) NaCl

(D) NaF

(E) NO2

2. Which of the following substance are responsible for the acid rains?

(A) H2O

(B) SO3

(C) NO2

(D) NaF

(E) SO3 and NO2

3. Which of the following substances is a polar solvent?

(A) H2O

(B) SO3

(C) NaCl

(D) NaF

(E) NO2

4. Which of the following substances has the highest melting point?

(A) H2O

(B) SO3

(C) NaCl

(D) NaF

(E) NO2

5. Which of the following substance has a trigonal planar geometry?

(A) H2O

(B) SO3

(C) NaCl

(D) NaF

(E) NO2

6. Which of the following molecules contain only sp3 hybridized carbons?

(A) CH4
(B) CH3CH2CH3
(C) C5H12
(D) CH4 and CH3CH2CH3
(E) All of them

7. Which of the following gases has a higher density than oxygen (measured at the same conditions)?

(A) N2
(B) F2
(C) CH4
(D) H2
(E) H2O(vapors)

8. The correct geometry for NH3 is
(A) trigonal planar
(B) tetrahedral
(C) bent
(D) linear
(E) None of the above.

9. Which of the following statements about carbon monoxide is NOT true?

(A) is less dense than CO2
(B) is a polar substance
(C) is a covalent substance
(D) it contains 2 sigma bonds
(E) all of them are true

10. The values for the atomic radii are increasing correctly in case:

(A) Li>Na>K>Cs
(B) Cs>K>Na>Li
(C) Cs>Na>K>Li
(D) Li>K>Na>Cs
(E) Li = Na = K= Cs

SAT Question of the Day

What is the oxidation state of Fe in Fe3O4?
(A)4/3
(B)8/3
(C)2
(D)3
(E)2 and 3

SAT Question of the Day

Which is the correct order of decreasing acidity for the aqueous solution of the following acids:

(A)HI > HBr > HCl >HF
(B)HF > HCl > HBr >HI
(C)HF > HI > HBr >HCl
(D)HCl> HBr > HI>HF
(E)HI =HCl =HBr =HF

Test number 6 - Ace the SAT II Chemistry

1.The technique utilized to determine the unknown concentration of a known base is called:

(A) Distillation
(B) Chromatograph
(C) Fractional crystallization
(D) Filtration
(E) Titration

2. Carbon dioxide is a polar molecule BECAUSE it has polar covalent bonds

(A) First sentence is true but the second one is false
(B) First sentence is false but the second one is true
(C) Both sentences are false
(D) Both sentences are true and there is no correlation between them
(E) Both sentences are true and there is a correlation between them

3. Which of the following would have the highest pH?
(A) HCl
(B) CH3COOH
(C) KOH
(D) SO2
(E) we need to know their concentrations in order to give a correct result

4. What is the molarity of a hydrochloric acid solution, HCl(aq), if 18.25g of HCl is dissolved in enough water to make 1.0 L of solution?

(A) 0.1825 M
(B) 0.25 M
(C) 0.05 M
(D) 0.5 M
(E) 18.25 M


5.What is the oxidation number of sulphur in Na2SO4 ?

(A) -4
(B) 2
(C) 4
(D) 6
(E) -6

6. In a galvanic cell the cathode is charged

(A) positive
(B) negative
(C) neutrum
(D) it depends on the type of galvanic cell
(E) it depends on the reaction inside the galvanic cell

7.How many isomers does pentane C5H12 have?

(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

8. Which of the following element is the most electronegative?

(A) Cl
(B) N
(C) H
(D) Na
(E) O

9.Which of the following compound is called ethane?

(A) CH4
(B) C2H2
(C) C2H4
(D) C2H6
(E) C6H6

10.If the pH of a solution increase the concentration of the H+ ions in the solution

(A) increases
(B) decreases
(C) remains constant
(D) depends on the solution
(E) depends on the initial concentration of the solution.

SAT Question of the Day

If you burn Na in air, the following reactions take place:
Na + O2 => A
A + O2 => B
Note: A and B are two different substances and the chemical equations are NOT balanced.

What it is the mass percentage of oxygen in substance "A"?

(A) 25.8 %
(B) 41 %
(C) 74.2 %
(D) 59 %
(E) None of the above.

SAT Question of the Day

How many isomers could hypothetically exist with the molecular formula C3H5Cl?

(A) 1
(B) 3
(C) 4
(D) 5
(E) 6