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+