Q. What is the primary oxidation state of lead in lead(II) oxide (PbO)? (2019)
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Solution
In lead(II) oxide, lead has an oxidation state of +2.
Correct Answer:
A
— +2
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Q. What is the primary oxidation state of nitrogen in ammonia (NH3)? (2021)
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Solution
In ammonia, nitrogen has an oxidation state of -3.
Correct Answer:
A
— -3
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Q. What is the primary oxidation state of nitrogen in nitric acid (HNO3)? (2023)
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Solution
In nitric acid, nitrogen has an oxidation state of +5.
Correct Answer:
C
— +5
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Q. What is the primary oxidation state of vanadium in V2O5? (2023)
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Solution
In V2O5, vanadium has an oxidation state of +5.
Correct Answer:
C
— +5
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Q. What is the primary product of the electrolysis of water? (2023)
A.
Hydrogen
B.
Oxygen
C.
Hydrogen Peroxide
D.
Ozone
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Solution
The primary products of the electrolysis of water are hydrogen and oxygen gases.
Correct Answer:
A
— Hydrogen
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Q. What is the primary product of the reaction between hydrogen and chlorine? (2019)
A.
Hydrochloric acid
B.
Hydrogen chloride
C.
Chlorine gas
D.
Water
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Solution
The primary product of the reaction between hydrogen and chlorine is hydrogen chloride (HCl).
Correct Answer:
B
— Hydrogen chloride
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Q. What is the primary product of the thermal decomposition of calcium carbonate? (2019)
A.
Calcium oxide
B.
Calcium hydroxide
C.
Calcium bicarbonate
D.
Calcium chloride
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Solution
The thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2).
Correct Answer:
A
— Calcium oxide
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Q. What is the primary product when aluminum reacts with hydrochloric acid? (2020)
A.
AlCl3
B.
H2
C.
Al(OH)3
D.
Al2Cl6
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Solution
When aluminum reacts with hydrochloric acid, hydrogen gas (H2) is produced along with aluminum chloride (AlCl3).
Correct Answer:
B
— H2
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Q. What is the primary product when calcium reacts with oxygen? (2022)
A.
Calcium oxide
B.
Calcium hydroxide
C.
Calcium carbonate
D.
Calcium peroxide
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Solution
Calcium reacts with oxygen to form calcium oxide (CaO).
Correct Answer:
A
— Calcium oxide
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Q. What is the primary product when lithium reacts with nitrogen? (2022)
A.
Lithium nitride
B.
Lithium oxide
C.
Lithium hydroxide
D.
Lithium carbonate
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Solution
Lithium reacts with nitrogen to form lithium nitride (Li3N).
Correct Answer:
A
— Lithium nitride
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Q. What is the primary product when potassium permanganate (KMnO4) is reduced in acidic medium? (2019)
A.
MnO2
B.
Mn2+
C.
MnO4-
D.
KMnO4
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Solution
In acidic medium, potassium permanganate (KMnO4) is reduced to Mn2+.
Correct Answer:
B
— Mn2+
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Q. What is the primary reason for the increase in ionization energy across a period in p-block elements? (2023)
A.
Increase in atomic size
B.
Increase in nuclear charge
C.
Decrease in shielding effect
D.
Increase in electron affinity
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Solution
The increase in nuclear charge across a period leads to higher ionization energy.
Correct Answer:
B
— Increase in nuclear charge
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Q. What is the primary source of sulfur dioxide in the atmosphere? (2020)
A.
Volcanic eruptions
B.
Automobile emissions
C.
Industrial processes
D.
Natural gas combustion
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Solution
Industrial processes, especially those involving the burning of fossil fuels, are the primary source of sulfur dioxide emissions.
Correct Answer:
C
— Industrial processes
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Q. What is the primary type of bonding in metallic solids? (2020)
A.
Ionic bonding
B.
Covalent bonding
C.
Metallic bonding
D.
Hydrogen bonding
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Solution
Metallic solids are primarily held together by metallic bonding, which involves a 'sea of electrons' that are free to move.
Correct Answer:
C
— Metallic bonding
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Q. What is the primary use of boron in the industry? (2023)
A.
Fertilizers
B.
Glass production
C.
Detergents
D.
Pharmaceuticals
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Solution
Boron is primarily used in the production of glass and ceramics.
Correct Answer:
B
— Glass production
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Q. What is the primary use of calcium carbonate? (2019)
A.
As a fertilizer
B.
In the production of glass
C.
As a building material
D.
In antacids
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Solution
Calcium carbonate is commonly used in antacids to neutralize stomach acid.
Correct Answer:
D
— In antacids
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Q. What is the primary use of glycerol in the food industry? (2023)
A.
Sweetener
B.
Preservative
C.
Thickening agent
D.
Flavor enhancer
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Solution
Glycerol is commonly used as a sweetener in food products due to its sweet taste and ability to retain moisture.
Correct Answer:
A
— Sweetener
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Q. What is the primary use of lithium in batteries? (2023)
A.
As a conductor
B.
As a cathode material
C.
As an anode material
D.
As an electrolyte
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Solution
Lithium is primarily used as an anode material in lithium-ion batteries due to its high electrochemical potential.
Correct Answer:
C
— As an anode material
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Q. What is the primary use of magnesium in industries? (2021)
A.
Construction
B.
Aerospace
C.
Electronics
D.
Pharmaceuticals
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Solution
Magnesium is primarily used in the aerospace industry due to its lightweight and strength.
Correct Answer:
B
— Aerospace
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Q. What is the primary use of magnesium in industry? (2023)
A.
Construction
B.
Aerospace
C.
Electronics
D.
Pharmaceuticals
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Solution
Magnesium is primarily used in construction and aerospace industries due to its lightweight and strength.
Correct Answer:
B
— Aerospace
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Q. What is the primary use of sodium bicarbonate (NaHCO3)? (2020)
A.
Baking
B.
Cleaning
C.
Medicine
D.
All of the above
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Solution
Sodium bicarbonate is used in baking, cleaning, and medicine, making it versatile.
Correct Answer:
D
— All of the above
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Q. What is the primary use of sulfuric acid (H2SO4) in industry? (2019)
A.
Fertilizer production
B.
Battery acid
C.
Cleaning agent
D.
Food preservative
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Solution
Sulfuric acid is primarily used in the production of fertilizers.
Correct Answer:
A
— Fertilizer production
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Q. What is the primary use of sulfuric acid in the industry? (2023)
A.
Fertilizer production
B.
Battery acid
C.
Detergent manufacturing
D.
Food preservation
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Solution
Sulfuric acid is primarily used as battery acid in lead-acid batteries.
Correct Answer:
B
— Battery acid
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Q. What is the primary use of titanium dioxide (TiO2)? (2023)
A.
Pigment
B.
Catalyst
C.
Semiconductor
D.
Reagent
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Solution
Titanium dioxide (TiO2) is primarily used as a white pigment in paints and coatings.
Correct Answer:
A
— Pigment
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Q. What is the principal quantum number of the outermost electron in a chlorine atom? (2022)
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Solution
Chlorine has an atomic number of 17, and its outermost electrons are in the 3rd shell, so n=3.
Correct Answer:
C
— 3
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Q. What is the principal quantum number of the outermost electron in an atom of potassium? (2022)
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Solution
Potassium has an atomic number of 19, and its outermost electron is in the n=4 shell.
Correct Answer:
C
— 3
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Q. What is the principal quantum number of the outermost electrons in an atom of chlorine? (2022)
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Solution
Chlorine has an atomic number of 17, and its outermost electrons are in the n=3 shell.
Correct Answer:
C
— 3
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Q. What is the process called when a gas turns into a liquid? (2022)
A.
Sublimation
B.
Condensation
C.
Evaporation
D.
Freezing
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Solution
Condensation is the process where a gas turns into a liquid.
Correct Answer:
B
— Condensation
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Q. What is the product of the oxidation of an aldehyde? (2023)
A.
Alcohol
B.
Carboxylic acid
C.
Ketone
D.
Alkane
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Solution
The oxidation of an aldehyde results in the formation of a carboxylic acid.
Correct Answer:
B
— Carboxylic acid
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Q. What is the product of the reaction between 1-bromobutane and sodium ethoxide in ethanol? (2020)
A.
Butane
B.
Ethyl butanoate
C.
Butyl ethyl ether
D.
1-Butanol
Show solution
Solution
The reaction of 1-bromobutane with sodium ethoxide leads to the formation of butyl ethyl ether through an SN2 mechanism.
Correct Answer:
C
— Butyl ethyl ether
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Showing 241 to 270 of 626 (21 Pages)
Chemistry (NEET) MCQ & Objective Questions
Chemistry is a crucial subject for students preparing for NEET and other competitive exams in India. Mastering Chemistry (NEET) is essential not only for scoring well but also for building a strong foundation in scientific concepts. Practicing MCQs and objective questions can significantly enhance your exam preparation, allowing you to tackle important questions with confidence.
What You Will Practise Here
Fundamental concepts of Physical Chemistry
Organic Chemistry reactions and mechanisms
Inorganic Chemistry periodic table trends
Stoichiometry and chemical calculations
Equilibrium and thermodynamics principles
Important definitions and key formulas
Diagrams related to chemical structures and reactions
Exam Relevance
Chemistry is a significant part of the syllabus for CBSE, State Boards, NEET, and JEE. In these exams, questions often focus on conceptual understanding and application of theories. You can expect a mix of direct questions, application-based problems, and conceptual MCQs that test your knowledge of key topics. Familiarity with common question patterns will help you navigate the exam more effectively.
Common Mistakes Students Make
Overlooking the importance of units in calculations
Confusing similar concepts in Organic Chemistry
Neglecting to balance chemical equations correctly
Misinterpreting questions that involve multiple steps
Failing to memorize essential definitions and formulas
FAQs
Question: What are the best ways to prepare for Chemistry (NEET) MCQs?Answer: Regular practice of MCQs, understanding core concepts, and revising key formulas are effective strategies.
Question: How can I improve my speed in solving Chemistry (NEET) objective questions?Answer: Time yourself while practicing and focus on familiarizing yourself with common question types.
Start solving practice MCQs today to test your understanding and boost your confidence in Chemistry (NEET). Remember, consistent practice is the key to success!