Q. What happens to the equilibrium position when a catalyst is added to a reaction at equilibrium? (2023)
A.
Shifts to the right
B.
Shifts to the left
C.
No change
D.
Increases Kc
Show solution
Solution
A catalyst speeds up both the forward and reverse reactions equally, thus it does not change the position of equilibrium or the value of Kc.
Correct Answer:
C
— No change
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Q. What is the balanced equation for the redox reaction between Cr2O7^2- and Fe^2+ in acidic medium? (2020)
A.
Cr2O7^2- + 6Fe^2+ → 2Cr^3+ + 3Fe^3+
B.
Cr2O7^2- + 3Fe^2+ → 2Cr^3+ + 3Fe^3+
C.
Cr2O7^2- + 4Fe^2+ → 2Cr^3+ + 4Fe^3+
D.
Cr2O7^2- + 2Fe^2+ → 2Cr^3+ + Fe^3+
Show solution
Solution
The balanced equation in acidic medium is Cr2O7^2- + 6Fe^2+ → 2Cr^3+ + 3Fe^3+.
Correct Answer:
A
— Cr2O7^2- + 6Fe^2+ → 2Cr^3+ + 3Fe^3+
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Q. What is the basic structural unit of lipids? (2020)
A.
Amino acids
B.
Nucleotides
C.
Fatty acids
D.
Monosaccharides
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Solution
Fatty acids are the basic structural units of lipids.
Correct Answer:
C
— Fatty acids
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Q. What is the boiling point elevation for a solution with 0.5 moles of a non-volatile solute in 1 kg of water? (Kb for water = 0.512 °C kg/mol) (2022)
A.
0.256 °C
B.
0.512 °C
C.
1.024 °C
D.
0.128 °C
Show solution
Solution
Boiling point elevation (ΔTb) = Kb * m = 0.512 °C kg/mol * 0.5 mol/kg = 0.256 °C.
Correct Answer:
A
— 0.256 °C
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Q. What is the boiling point trend among amines? (2020)
A.
Amines have lower boiling points than alkanes
B.
Amines have higher boiling points than alcohols
C.
Boiling points increase with molecular weight
D.
All of the above
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Solution
All of the above statements are true regarding the boiling point trends of amines.
Correct Answer:
D
— All of the above
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Q. What is the bond angle in the water molecule (H2O)? (2023)
A.
90 degrees
B.
104.5 degrees
C.
120 degrees
D.
180 degrees
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Solution
The bond angle in a water molecule is approximately 104.5 degrees due to the bent shape caused by lone pairs on oxygen.
Correct Answer:
B
— 104.5 degrees
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Q. What is the bond angle in water (H2O) due to the presence of hydrogen? (2023)
A.
90 degrees
B.
104.5 degrees
C.
120 degrees
D.
180 degrees
Show solution
Solution
The bond angle in water is approximately 104.5 degrees due to the bent shape of the molecule.
Correct Answer:
B
— 104.5 degrees
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Q. What is the bond angle in water (H2O) due to the presence of lone pairs on oxygen? (2019)
A.
104.5°
B.
109.5°
C.
120°
D.
90°
Show solution
Solution
The bond angle in water is approximately 104.5° due to the repulsion between the lone pairs on the oxygen atom.
Correct Answer:
A
— 104.5°
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Q. What is the change in internal energy (ΔU) for an ideal gas during an isothermal process? (2021)
A.
ΔU = 0
B.
ΔU = nRT
C.
ΔU = -nRT
D.
ΔU = PV
Show solution
Solution
In an isothermal process for an ideal gas, the temperature remains constant, which means the internal energy does not change. Therefore, ΔU = 0.
Correct Answer:
A
— ΔU = 0
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Q. What is the change in internal energy (ΔU) for an ideal gas undergoing an isothermal process? (2021)
A.
ΔU = 0
B.
ΔU = Q
C.
ΔU = W
D.
ΔU = Q + W
Show solution
Solution
In an isothermal process for an ideal gas, the temperature remains constant, which means the internal energy does not change. Therefore, ΔU = 0.
Correct Answer:
A
— ΔU = 0
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Q. What is the change in internal energy (ΔU) for an isothermal process for an ideal gas? (2021)
A.
ΔU = 0
B.
ΔU = nRT
C.
ΔU = -nRT
D.
ΔU = PV
Show solution
Solution
In an isothermal process for an ideal gas, the temperature remains constant, which means the internal energy does not change. Therefore, ΔU = 0.
Correct Answer:
A
— ΔU = 0
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Q. What is the change in internal energy (ΔU) for an isothermal process of an ideal gas? (2021)
A.
ΔU = 0
B.
ΔU = nRT
C.
ΔU = -nRT
D.
ΔU = PV
Show solution
Solution
In an isothermal process for an ideal gas, the temperature remains constant, which means the internal energy does not change. Therefore, ΔU = 0.
Correct Answer:
A
— ΔU = 0
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Q. What is the change in oxidation state of carbon in the reaction C6H12O6 → 2C2H5OH? (2023)
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Solution
In the conversion of glucose to ethanol, the oxidation state of carbon decreases, indicating a reduction of -1.
Correct Answer:
C
— -1
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Q. What is the change in oxidation state of manganese in the reaction MnO4- + 8H+ + 5e- → Mn2+ + 4H2O? (2023)
A.
+7 to +2
B.
+2 to +7
C.
0 to +2
D.
+4 to +2
Show solution
Solution
Manganese changes from +7 in MnO4- to +2 in Mn2+, indicating a reduction.
Correct Answer:
A
— +7 to +2
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Q. What is the chemical formula for the compound formed between strontium and chlorine? (2019)
A.
SrCl
B.
SrCl2
C.
Sr2Cl
D.
Sr2Cl3
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Solution
Strontium forms a compound with chlorine as SrCl2, where strontium has a +2 charge and chlorine has a -1 charge.
Correct Answer:
B
— SrCl2
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Q. What is the color of potassium permanganate (KMnO4)? (2021)
A.
Colorless
B.
Green
C.
Purple
D.
Yellow
Show solution
Solution
Potassium permanganate (KMnO4) is known for its deep purple color.
Correct Answer:
C
— Purple
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Q. What is the color of the complex ion [Cu(NH3)4]2+? (2021)
A.
Blue
B.
Green
C.
Yellow
D.
Red
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Solution
[Cu(NH3)4]2+ is known to exhibit a blue color due to d-d transitions.
Correct Answer:
A
— Blue
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Q. What is the color of the flame produced by burning strontium salts? (2023)
A.
Red
B.
Green
C.
Blue
D.
Yellow
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Solution
Strontium salts produce a red flame when burned.
Correct Answer:
A
— Red
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Q. What is the color of the flame produced by lithium salts? (2019)
A.
Red
B.
Green
C.
Blue
D.
Yellow
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Solution
Lithium salts produce a red flame when burned.
Correct Answer:
A
— Red
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Q. What is the color of the solution of potassium dichromate (K2Cr2O7)? (2023)
A.
Yellow
B.
Green
C.
Blue
D.
Red
Show solution
Solution
Potassium dichromate (K2Cr2O7) gives a yellow solution.
Correct Answer:
A
— Yellow
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Q. What is the common oxidation state of alkaline earth metals? (2019)
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Solution
Alkaline earth metals typically exhibit a common oxidation state of +2.
Correct Answer:
B
— +2
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Q. What is the common oxidation state of aluminum in its compounds? (2020)
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Solution
Aluminum commonly exhibits an oxidation state of +3 in its compounds.
Correct Answer:
C
— +3
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Q. What is the common oxidation state of chromium in CrO3? (2023)
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Solution
In CrO3, chromium (Cr) has an oxidation state of +6.
Correct Answer:
C
— +6
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Q. What is the common oxidation state of iron in Fe2O3? (2019)
Show solution
Solution
In Fe2O3, iron has a common oxidation state of +3.
Correct Answer:
C
— +3
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Q. What is the common oxidation state of iron in FeCl3? (2023)
Show solution
Solution
In FeCl3, iron (Fe) has an oxidation state of +3.
Correct Answer:
B
— +3
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Q. What is the common oxidation state of sulfur in sulfuric acid (H2SO4)? (2022)
Show solution
Solution
In sulfuric acid, sulfur has an oxidation state of +6.
Correct Answer:
C
— +6
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Q. What is the coordination number of atoms in a face-centered cubic (FCC) lattice? (2021)
Show solution
Solution
In a face-centered cubic (FCC) lattice, each atom is surrounded by 6 other atoms, giving it a coordination number of 6.
Correct Answer:
B
— 6
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Q. What is the coordination number of atoms in a face-centered cubic (FCC) structure? (2021)
Show solution
Solution
In a face-centered cubic (FCC) structure, each atom is in contact with 12 other atoms, giving it a coordination number of 12.
Correct Answer:
D
— 12
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Q. What is the coordination number of the central metal ion in the complex ion [Co(NH3)6]3+? (2021)
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Solution
In the complex [Co(NH3)6]3+, there are six ammonia (NH3) ligands coordinated to the cobalt ion, giving it a coordination number of 6.
Correct Answer:
C
— 6
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Q. What is the effect of a catalyst on a chemical reaction? (2019)
A.
Increases activation energy
B.
Decreases activation energy
C.
Changes the equilibrium constant
D.
Has no effect on the reaction rate
Show solution
Solution
A catalyst lowers the activation energy of a reaction, thereby increasing the reaction rate.
Correct Answer:
B
— Decreases activation energy
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Showing 121 to 150 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!