93 practice MCQs on common inorganic compounds, metals and their extraction, coordination compounds, fertilizers and chemical industries. Every question has the correct answer and an explanation.
Start free — 20 questionsInorganic Chemistry and Chemical Industries is part of the MDCAT Chemistry syllabus. This page collects Inorganic Chemistry and Chemical Industries MCQs in the style of past MDCAT papers — below are 12 of them with answers and explanations, and the full set of 93 questions is in the HighYield MDCAT QBank.
This chapter covers: common inorganic compounds, metals and their extraction, coordination compounds, fertilizers and chemical industries.
Correct answer: A. 1:35.5
In H2 + Cl2 to 2HCl, 2 g of H2 reacts with 71 g of Cl2 (2 moles), giving a mass ratio of reactants of 1:35.5 (per mole of H2 to mole of Cl2 relative to atomic masses).
Correct answer: B. Positive reduction potential
Coinage metals (Cu, Ag, Au) are the least reactive because they have positive (high) standard reduction potentials, making them resistant to oxidation.
Correct answer: C. Air
In the Haber process, the nitrogen used is obtained from the atmosphere, which is roughly 78% nitrogen gas.
Correct answer: C. Pressure should be increased
Since the Haber process equilibrium (N2 + 3H2 ⇌ 2NH3) reduces the number of gas moles going forward, increasing the pressure shifts the equilibrium toward the product side, increasing ammonia yield.
Correct answer: A. Addition polymer
Polyvinyl chloride (PVC) is formed by the addition polymerization of vinyl chloride monomers, making it an addition polymer.
Correct answer: D. Plastic
Burning plastic waste, due to its high calorific (energy) content, is considered a useful fuel source for industrial energy or electricity generation.
Correct answer: A. C6H6
Benzene (C6H6) will have the maximum repulsion with H2O because benzene is nonpolar and does not readily interact with polar molecules like water. The benzene ring has a symmetrical, planar structure with delocalized pi-electrons, making it non-reactive and unable to form strong hydrogen bonds with water molecules.
Correct answer: B. Aluminium
The formation of an Al3+ ion involves the aluminum atom losing three valence electrons to achieve a stable electron configuration.Aluminum is in Group 3A of the periodic table, meaning it has three valence electrons.To achieve a stable electron configuration, similar to that of a noble gas (like neon), aluminum tends to lose its three valence electrons.Upon losing three electrons, aluminum forms an Al3+ ion.
Correct answer: D. Li
Sodium, potassium and rubidium are all in the same group, but sodium is larger than lithium, potassium is larger than sodium and rubidium is larger than potassium beacuse atomic sizes increase as we move down the group.
Correct answer: A. Al
The metal that is extracted from bauxite is A. Al (aluminum).
Correct answer: A. Be
Option A is correct as Beryllium is one of the 2 alkaline earth metals that does not impart colour to flame test. Cs gives violet flame, Ca gives brick red flame and K gives lilac flames to flame test.
Correct answer: B. Effective nuclear charge
The atomic radius of a sodium atom is 186 pm, while the ionic radius of a sodium ion (Na+) is 95 pm. The smaller radius of the sodium ion is due to the effective nuclear charge, which is the net positive charge experienced by the outermost electrons.When a sodium atom loses an electron to form a sodium ion, the number of electrons decreases, but the number of protons in the nucleus remains the same. This results in an increased effective nuclear charge, which pulls the remaining electrons closer to the nucleus, reducing the ionic radius.
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