Chemistry MCQs unit 10 1st-Year completely solved MCQs from past papers. 11th class Chemistry important MCQs notes with a solution in pdf. These MCQs notes of Chemistry are for FSC Part 1 and MDCAT Entry test preparation. Before you download the MCQs let me explain the subject Chemistry.
Chemistry is the branch of science that deals with elements and compounds that come from atoms, molecules, and ions, including how they are made, how they behave, and how they change when they react with other substances. Chemistry is a branch of science that falls between physics and biology in terms of its scope. It is also known as the central science because it gives a basic understanding of both basic and applied sciences.
Chemistry MCQs Unit 10-MDCAT Prep
chemistry MCQs unit 10 FSC part 1| Chemistry MCQs Unit 10 for entry test preparation| chemistry MCQs unit 10 from past papers.
(1) The oxidation number of chromium in K2, Cr2, and O7, is:
(a) 14
(b) 12
(c) 6
(d) None of these
(2) In the reaction 2Fe + Cl2 2FeCl3:
(a) Fc is reduced
(b) Fc is oxidized
(c) ch is oxidized
(d) None of these
(3) When fused PbBr2 is electrolyzed when:
(a) Bromine appears &t cathode
(b) Lead is deposited at the cathode
(c) Lead appears at the anode
(d) None of these happens
(4) During electrolysis of KNO3.,, H2 is evolved at:
(a) Anode
(b) Cathode
(c) Both a and b
(d) None
(5) During a redox reaction, an oxidizing agent:
(a) Gains electrons
(b) Is oxidized
(C) Loses electrons
d) Is hydrolyzed
11th Class Chemistry MCQs Chapter 10
(6) In an oxidation process the oxidation number of the element:
(a) Increases
(b) Decreases
(c) Docs not change
(d) None of these
(7) Oxidation number of oxygen in OF2, is:
(a) “1
(b) -1
(C) +2
(d) -2
(8) During electrolysis of H2SO4 (g) O2 is evolved at:
(a) Cathode
(b) Anode
(c) Both a and b,
(d) None of these
(9) Which element acts as the reducing agent in the reaction?
Zn + H2SO4—— ZnSO4, + H2
(a) Zn
(b) H
(C) S
(d) O
(10) Electric current passes through both molten and solution forms of NaCl because of
(a) Ionic bonding
(b) Na+” and Cl ions
(c) Ions of water
(d) Hydration of ions
(11) In lead accumulator the electrolyte H2SO4, solution is:
(a) 30%
(b) 60% H2SO4
(C) 80%
(d) 90%
(12) Id alkaline battery, the electrolyte contains:
(a) MnO2
(b) KOH
(c) NaCl
(d) NaNO,
1st-Year Chemistry MCQs With Answer Keys:
(13) Strong reducing agents have:
(a) Greater positive value of standard reduction potential.
(b) Greater negative value of standard reduction potential.
(C) Lesser positive value of standard reduction potential.
(d) None of these
(14) Strong oxidizing agents have:
(a) Greater positive value of standard reduction potential.
(b) Greater positive value of standard reduction potential
(C) • Greater negative value of standard reduction potential.
(d) None of these
(15) Metals that are above SHE in electrochemical series:
(a) Can liberate H2 from acid
(b) Cannot liberate H2 from acid
(C) Cannot always liberate H2 from acid
(d) None of these
(16) Corrosion reactions are
(a) Spontaneous redox reaction.
(b) Non-spontaneous acid-base reactions.
(c) Spontaneous acid-base reactions
(d) None of these