SAT Question of the Day

Oxygen triplet state is used in organic chemistry to promote radicals chain reaction:
R. + O2 = R-O-O.
What is the bond order in the Oxygen triplet state?
(A)0
(B)1
(C)2
(D)3
(E)4

SAT Question of the Day

What are the oxidation numbers for In and Pb in the following compounds: InCl2 and Pb2O3?
(A) In = 2, Pb = 3
(B) In = 1, Pb = 3
(C) In = 2, Pb = 4
(D) In = 2, Pb = 2
(E) None of the above;

SAT Question of the Day

An element M forms a chloride which contains 34,66 % M.
Which of the following is true?
(A)The element is Aluminum
(B)The molecular formula of the compound is MCl
(C)if the chloride is reacted with NaOH a green precipitate is formed.
(D)the metal has amphoteric properties
(E)the metal M can also form another chloride MCl2.

Note: You are not allowed to use a calculator during the SAT exam. Try not to use one.Good luck.

SAT Question of the Day

A student has a sample of an unknown substance. In order to identify the cations presented he performs the following experiments:
When the sample is reacted with NaOH, a precipitate forms which is soluble in excess(of NaOH).
When the sample is reacted with NH3, a precipitate forms which is insoluble in excess.
When the sample is reacted with Cl- , a precipitate forms.
Which cation is present in the solution?
(A)Fe2+
(B)Fe3+
(C)Cu2+
(D)Al3+
(E)Pb2+

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

SAT Question of the Day

Which of the following orbitals is more stable energetically?

(A)sp
(B)sp2
(C)sp3
(D)All of them have the same energy
(E)Can not be deduced

Test number 5 - Ace the SAT II Chemistry

Questions 1-4 refer to the following characteristics

(A) Nonpolar covalent substance
(B) Noble gas
(C) Metallic substance
(D) Ionic substance
(E) Polar covalent substance

1. Lithium is a

(A) Nonpolar covalent substance
(B) Noble gas
(C) Metallic substance
(D) Ionic substance
(E) Polar covalent substance

2. F2 is a

(A) Nonpolar covalent substance
(B) Noble gas
(C) Metallic substance
(D) Ionic substance
(E) Polar covalent substance

3. If dissolved in water, it is a good electricity conductor:

(A) Nonpolar covalent substance
(B) Noble gas
(C) Metallic substance
(D) Ionic substance
(E) Polar covalent substance

4. A solution that is at equilibrium and contains the maximum amount of solute for a given amount of solvent at constant temperature and pressure is called:

(A) Saturated
(B) Suspension
(C) Supersaturated
(D) Miscible
(E) Colloid

5. The ground state electron configuration of the chromium atom (Z = 24) is characterized by which of the following?

I the presence of unpaired electrons
II fully occupied d-orbitals
III 4s orbital is fully occupied

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


6. H2S has a density of 1,52 g/L at STP. Which of the following gave a density at STP less than that of H2S?

(A) O2
(B) H2Se
(C) Cl2
(D) CO2
(E) All of them

7. Draw the structural formula for the BF3. How many unshared pairs of electrons are in the outer shell of the central Boron atom?

(A) 7
(B) 5
(C) 3
(D) 1
(E) 0


8. Which of the following solution, if dissolved in water, has a pH < 7?

(A) MgO
(B) NH3
(C) CO2
(D) Ba(OH)2
(E) PbO2

9. Of the following elements, which is most likely to form a negative ion with a charge of -2?

(A) F
(B) N
(C) S
(D) Mg
(E) Be

10. The hybridization associated with the central atom of a molecule in which all the bond angles are 180 o is


(A) sp
(B) sp2
(C) sp3
(D) sp3d
(E) sp3d2

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.

SAT Question of the Day

Which of the following molecule has the second largest dipole moment?


(A)NH3
(B)NF3
(C)BF3
(D)NH4+
(E)HF

Test Number 3-Ace the SAT II Chemistry

1. From their electron configurations, one can predict that the geometric configuration for which of the following molecules is correct?

(A) HF bent (v shaped)
(B) H2O tetrahedral
(C) BF3 trigonal planar
(D) NF3 trigonal planar
(E) More than an answer is correct

2. Which of the following statements about carbon dioxide is true?

(A) It is less dense than air at STP
(B) If dissolved in water, the pH of the solution is > 7.
(C) It has a linear geometry
(D) At room temperature it decomposes into Carbon and Oxygen
(E) All statements are wrong.





3. How many grams of H2O are formed in the complete combustion of 5.8 grams of butane, C4H10?

(A) 0.9 g
(B) 1.8 g
(C) 18 g
(D) 9 g
(E) 4.5 g



4. Which of the following species can act as a Bronsted-Lowry acid?

(A) NH4+
(B) (CO3)2-
(C) NH3
(D) NaH
(E) Ba(OH)2

Questions 5-8 refer to the following substances:


(A) SO3
(B) HCl
(C FeCl3
(D) AgCl
(E) MgO

5. Which of the following is known to produce acid rain?

(A) SO3
(B) HCl
(C) FeCl3
(D) AgCl
(E) MgO

6. Which of the following is a salt that forms acidic aqueous solutions

(A) SO3
(B) HCl
(C) FeCl3
(D) AgCl
(E) MgO


7. Which of the following is a basic oxide?

(A) SO3
(B) HCl
(C) FeCl3
(D) AgCl
(E) MgO

8. Which of the following is insoluble in water at 25 C?

(A) SO3
(B) HCl
(C) FeCl3
(D) AgCl
(E) MgO

9. The increasing order of the ionic/atomic radius is correctly shown in:

(A) K + > Ar > Cl-
(B) Cl- > K+ > Ar
(C) K+ > Cl- > Ar
(D) Cl- > Ar > K+
(E) Ar > Cl- > K+

10. Which of the following is an alkali earth metal?

(A) Li
(B) Na
(C) Mg
(D) Al
(E) Pb

Test Number 2-Ace the SAT II Chemistry

1.What is the empirical formula of a compound that contains 0.04 mole of sodium, 0.04 mole of sulfur, and 0.06 mole of oxygen?

(A) Na2SO4
(B) Na2SO3
(C) NaSO3
(D) Na2S2O4
(E) Na2S2O3

2.How many milliliters of 0.300 M sodium hydroxide must be added to a 150 mL solution of 0.100 M hydrochloric acid to obtain a solution with a pH of 7.00?
(A) 25 ml
(B) 50 ml
(C) 75 ml
(D) 100 ml
(E) 150 ml

3.Which of the following has the highest first ionization energy?

(A) Na
(B) F
(C) Ne
(D) H2
(E) O2

4. The hybridization on the carbon in ethane, C2H6, is

(A)sp3
(B)sp2
(C)sp
(D)sp3d
(E)sp3d2

5.Which of the following gases is the most dense when all are measured under the same conditions?


(A) H2
(B) O2
(C) Cl2
(D) CO2
(E) NO2

Questions 6-9 refer to the following empirical formulas

(A) AB
(B) AB2
(C) AB3
(D) A2B
(E) A2B3

Which of the above represents the formula for the most common compound of A and B, where A and B represent given pairs of elements or polyatomic ions as indicated below?

6. A = Al and B = F

(A) AB
(B) AB2
(C) AB3
(D) A2B
(E) A2B3

7.A = Na and B = O2

(A) AB
(B) AB2
(C) AB3
(D) A2B
(E) A2B3

8. A = C and B = O
(A) AB
(B) AB2
(C) AB3
(D) A2B
(E) A2B3


9. A = NH4+ and B = (SO4)2-

(A) AB
(B) AB2
(C) AB3
(D) A2B
(E) A2B3

10. Which of the following compounds is a semimetal ?
(A) Na
(B) Be
(C) Cl
(D) As
(E) N

Question and Answer

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Test Number 1-Ace the SAT II Chemistry

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