MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
Choose an option to check your answer.
Correct Answer: C. Number of donor atoms directly bonded to the central metal
Explanation:
Coordination number counts metal-ligand attachment sites.
A bidentate ligand contributes two donor atoms.
Choose an option to check your answer.
Correct Answer: D. A charged species containing a central metal bonded to ligands
Explanation:
Complex ions have coordinate bonds between metal and ligands.
Their charge includes metal and ligand charges.
Choose an option to check your answer.
Correct Answer: A. +2
Explanation:
Six CN- ligands contribute -6 total.
Fe must be +2 to give overall charge -4.
Choose an option to check your answer.
Correct Answer: C. A naturally occurring material from which a valuable substance can be extracted economically
Explanation:
An ore contains a useful mineral in sufficient concentration.
Economic and technological factors determine whether extraction is worthwhile.
Choose an option to check your answer.
Correct Answer: C. A cell specialized for transmitting nerve signals
Explanation:
Neurons receive, process, and transmit information.
They communicate through synapses.
Choose an option to check your answer.
Correct Answer: C. They have filled valence shells
Explanation:
Filled valence shells are especially stable.
Noble gases therefore have little tendency to gain or lose electrons.
Choose an option to check your answer.
Correct Answer: D. Receive signals toward the neuron cell body
Explanation:
Dendrites provide a large receptive surface.
They receive input from other cells.
Choose an option to check your answer.
Correct Answer: D. Fluorine
Explanation:
Fluorine has very high electronegativity and a weak F-F bond.
It is the strongest elemental oxidizing halogen.
Choose an option to check your answer.
Correct Answer: A. Receive signals toward the neuron cell body
Explanation:
Dendrites provide a large receptive surface.
They receive input from other cells.
Choose an option to check your answer.
Correct Answer: A. Existence of an element in different structural forms
Explanation:
Allotropes differ in atomic arrangement and properties.
Diamond and graphite are carbon allotropes.
Choose an option to check your answer.
Correct Answer: B. Receive signals toward the neuron cell body
Explanation:
Dendrites provide a large receptive surface.
They receive input from other cells.
Choose an option to check your answer.
Correct Answer: B. Graphite
Explanation:
Graphite has delocalized electrons within its layers.
These electrons allow electrical conduction.
