Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
Which of the following apparatus is NOT used in volumetric analysis?
Pipette
Burette
Desiccator
conical flask
Correct answer is C
- The most common apparatus used in volumetric determinations are the pipette,buret, measuring cylinder, volumetric and conical (titration) flask.
- A common use for desiccators is to protect chemicals which are hygroscopic or which react with water from humidity.
T is constant, P varies directly with V
P is constant, V varies inversely with T
V is constant, P varies directly with T
T is constant, V varies inversely with P
Correct answer is D
Boyle's law states that the pressure (p) of a given quantity of gas varies inversely with its volume (v) at constant temperature; i.e., in equation form, pv = k, a constant. ...
Which of the following substances can be classified as heavy chemicals?
CaOCl2
H2SO4
AgNO3
CaO
Correct answer is B
- heavy chemicals are produced and handled in large lots and are often in a crude state.
- Some examples of bulk chemicals are ammonia, sulfuric acid, and sodium hydroxide
- Fine chemicals are single, pure and complex chemicals that are only produced in small amounts
ethane and ethene
ethene and ethane
ethyne and ethene
ethane and ethyne
Correct answer is B
No explanation has been provided for this answer.
which of the following organic compounds has the lowest boiling point?
C6H14
C5H12
C4H10
( CH3 )3
Correct answer is D
- The boiling points of alkanes increase with increasing number of carbons. This is because the intermolecular attractive forces, although individually weak, become cumulatively more significant as the number of atoms and electrons in the molecule increases.
- However; branched alkanes normally exhibit lower boiling points than unbranched alkanes of the same carbon content. This occurs because of the greater van der Waals forces that exist between molecules of the unbranched alkanes