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.
A substance is said to be hygroscopic if it absorbs
water from the atmosphere to form a solution
heat from the surrounding
carbon (IV) oxide from the atmosphere
moisture from the atmosphere without dissolving
Correct answer is D
No explanation has been provided for this answer.
Which of following acids forms normal salts only?
Tetraoxosulphate (VI) acid
Trioxosulphate (IV) acid
Acetic acid
Tetraoxophosphate (V) acid
Correct answer is C
So we can determine that the basicity of Acetic acid is 1 because it releases one hydrogen ion in an aqueous solution.
Due to this they act as very weak acids. When weak acid reacts with strong base, they tend to form normal salt.
A major factor considered in selecting a suitable method for preparing a simple salt is its
crystalline form
melting point
reactivity with dilute acids
solubility in water
Correct answer is D
No explanation has been provided for this answer.
The gas given off when NH4 Cl is heated with an alkali is
H2
Cl2
N2
NH3
Correct answer is D
No explanation has been provided for this answer.
123g
139g
155g
182g
Correct answer is D
S + O\(_2\) → SO\(_2\).
According to the equation 32g of O\(_2\) produced 64g of SO\(_2\)
therefore 91g of O2 will produce yg of SO2
y = \(\frac{91 * 64}{32}\)
y = 182g of SO\(_2\)