The number of replaceable hydrogen atoms in one acid indicates its
basicity
acidity
alkalinity
reactivity
PH value
Correct answer is A
No explanation has been provided for this answer.
The components of universal indicator solution can best be separated by
chromatography
filtration
evaporation
crystallization
fractional distillation
Correct answer is A
No explanation has been provided for this answer.
The alloy used for metal work and plumbing contains
lead and tin
iron and carbon
copper and tin
aluminium and copper
lead and antimony
Correct answer is A
No explanation has been provided for this answer.
Zinc displaces copper from an aqueous solution of copper (ll) salt because
copper is a transition element
copper is a moderately reactive metal
Zinc and copper have reducing prperties
zinc is more reactive than copper
zinc reacts with both acids and alkalis
Correct answer is D
No explanation has been provided for this answer.
When ammonium chloride is dissolved in water in a test tube, the tube feels colder showing that
the solution is unsaturated
sublimation has ocurred
ammonia gas is evolved
the process is endothermic
condensation has occurred
Correct answer is D
No explanation has been provided for this answer.