Chemistry Questions

Q:

What is the general formula for a straight-chain alkane?

A) C2nH2n+3. B) CnH2n+2
C) CnH2n D) CnH3n+2.
 
Answer & Explanation Answer: B) CnH2n+2

Explanation:
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1 2004
Q:

In a concentrated solution there is

A) no solute B) a large amount of solvent
C) no solvent D) a large amount of solute
 
Answer & Explanation Answer: D) a large amount of solute

Explanation:

In a concentrated solution there is a large amount of solute.

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1 2001
Q:

Vinegar is __________ .

A) diluted acetic acid B) glacial acetic acid
C) glacial formic acid D) diluted formic acid
 
Answer & Explanation Answer: A) diluted acetic acid

Explanation:
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1 1987
Q:

Magnesium (Mg) + Oxygen (O2) = ?

A) Mg2O B) MgO4
C) O2Mg D) MgO
 
Answer & Explanation Answer: D) MgO

Explanation:
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4 1987
Q:

Metals that are liquid at room temperature?

A) Caesium B) Gallium
C) Rubidium D) Mercury
 
Answer & Explanation Answer: D) Mercury

Explanation:

Mercury is the only metal that is in liqid form at room temperature. Caesium, Gallim and Rubidium are also metals that are in liquid form but at slightly high temperature than the room temperature.

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1 1983
Q:

The chemical makeup of a rock is

A) Nutrients B) Minerals
C) Metals D) Water
 
Answer & Explanation Answer: B) Minerals

Explanation:

The chemical composition of a rock is mainly minerals.

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1 1976
Q:

Arrange the following compounds in order of increasing acidity?

A) o-cresol < phenol < o-nitrophtenol B) phenol < o-nitrophtenol < o-cresol
C) o-nitrophtenol < o-cresol < phenol D) None of the above
 
Answer & Explanation Answer: A) o-cresol < phenol < o-nitrophtenol

Explanation:
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0 1965
Q:

The atomic mass of an element depends upon the

A) number of electrons B) number of protons
C) number of neutrons D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The atomic mass of an element depends upon the number of protons, electrons and neutrons in the atoms which make the elements.

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1 1960