Q. What is the effect of adding a non-volatile solute to a solvent on its boiling point? (2019)
A.
Increases boiling point
B.
Decreases boiling point
C.
No effect
D.
Depends on the solute
Show solution
Solution
Adding a non-volatile solute increases the boiling point due to boiling point elevation.
Correct Answer:
A
— Increases boiling point
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Q. What is the effect of adding a non-volatile solute to a solvent on its vapor pressure? (2023)
A.
Increases vapor pressure
B.
Decreases vapor pressure
C.
No effect
D.
Depends on the solute
Show solution
Solution
Adding a non-volatile solute decreases the vapor pressure of the solvent due to the solute particles occupying space at the surface.
Correct Answer:
B
— Decreases vapor pressure
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Q. What is the effect of heavy metals in the environment? (2023)
A.
Nutrient enrichment
B.
Toxicity to organisms
C.
Soil improvement
D.
Water purification
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Solution
Heavy metals can be toxic to organisms, leading to bioaccumulation and harmful effects on ecosystems.
Correct Answer:
B
— Toxicity to organisms
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Q. What is the effect of increasing pressure on the equilibrium of the reaction: 2N2(g) + 3H2(g) ⇌ 2NH3(g)? (2021)
A.
Shift to the left
B.
Shift to the right
C.
No effect
D.
Increase in temperature
Show solution
Solution
Increasing pressure shifts the equilibrium towards the side with fewer moles of gas. In this case, it shifts to the right, producing more NH3.
Correct Answer:
B
— Shift to the right
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Q. What is the effect of increasing temperature on the conductivity of an electrolyte solution? (2019)
A.
Increases conductivity
B.
Decreases conductivity
C.
No effect
D.
Depends on the electrolyte
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Solution
Increasing temperature generally increases the conductivity of an electrolyte solution due to increased ion mobility.
Correct Answer:
A
— Increases conductivity
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Q. What is the effect of increasing temperature on the kinetic energy of particles in a solid? (2023)
A.
Decreases kinetic energy
B.
Increases kinetic energy
C.
No effect
D.
Causes phase change
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Solution
Increasing temperature increases the kinetic energy of particles, leading to potential phase change.
Correct Answer:
B
— Increases kinetic energy
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Q. What is the effect of increasing the concentration of reactants on the rate of reaction? (2023)
A.
Increases the rate
B.
Decreases the rate
C.
No effect
D.
Depends on the reaction
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Solution
Increasing the concentration of reactants generally increases the rate of reaction due to more frequent collisions.
Correct Answer:
A
— Increases the rate
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Q. What is the effect of increasing the size of the halogen atom on the bond strength of haloalkanes? (2021)
A.
Increases bond strength
B.
Decreases bond strength
C.
No effect
D.
Increases reactivity
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Solution
As the size of the halogen atom increases, the bond length increases, leading to a decrease in bond strength.
Correct Answer:
B
— Decreases bond strength
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Q. What is the effect of increasing the size of the halogen in haloalkanes on the reactivity? (2023)
A.
Increases reactivity
B.
Decreases reactivity
C.
No effect
D.
Reactivity depends on the solvent
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Solution
Increasing the size of the halogen decreases the bond strength, thus increasing the reactivity of haloalkanes in nucleophilic substitution.
Correct Answer:
A
— Increases reactivity
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Q. What is the effect of increasing the temperature on the equilibrium constant Kc for an endothermic reaction? (2023)
A.
Kc decreases
B.
Kc increases
C.
Kc remains constant
D.
Kc becomes zero
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Solution
For an endothermic reaction, increasing the temperature shifts the equilibrium to the right, thus increasing the value of Kc.
Correct Answer:
B
— Kc increases
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Q. What is the effect of temperature on the solubility of most solid solutes in liquids? (2022)
A.
Increases with temperature
B.
Decreases with temperature
C.
No effect
D.
Varies with the solute
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Solution
For most solid solutes, solubility in liquids increases with temperature due to increased kinetic energy of the molecules.
Correct Answer:
A
— Increases with temperature
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Q. What is the formula for calculating the density of a crystalline solid? (2020)
A.
Density = mass/volume
B.
Density = volume/mass
C.
Density = mass × volume
D.
Density = mass + volume
Show solution
Solution
The density of a crystalline solid is calculated using the formula Density = mass/volume.
Correct Answer:
A
— Density = mass/volume
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Q. What is the formula for calculating the number of atoms in a face-centered cubic unit cell? (2022)
A.
N = 4
B.
N = 2
C.
N = 1
D.
N = 8
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Solution
In a face-centered cubic unit cell, there are 4 atoms (1/8 from each of the 8 corners and 1/2 from each of the 6 faces).
Correct Answer:
A
— N = 4
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Q. What is the formula for calculating the number of moles from mass and molar mass? (2023)
A.
moles = mass × molar mass
B.
moles = mass / molar mass
C.
moles = molar mass / mass
D.
moles = mass + molar mass
Show solution
Solution
The correct formula is moles = mass / molar mass.
Correct Answer:
B
— moles = mass / molar mass
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Q. What is the formula for calculating the number of moles from mass? (2023)
A.
moles = mass / molar mass
B.
moles = mass × molar mass
C.
moles = mass + molar mass
D.
moles = mass - molar mass
Show solution
Solution
The formula for calculating the number of moles is moles = mass / molar mass.
Correct Answer:
A
— moles = mass / molar mass
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Q. What is the formula for calculating the number of moles of solute in a solution? (2023)
A.
Molarity x Volume
B.
Molarity / Volume
C.
Volume / Molarity
D.
Moles x Volume
Show solution
Solution
Number of moles = Molarity x Volume (in liters).
Correct Answer:
A
— Molarity x Volume
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Q. What is the freezing point depression of a solution containing 1 mole of NaCl in 1 kg of water? (2022)
A.
1.86 °C
B.
3.72 °C
C.
2.52 °C
D.
0.93 °C
Show solution
Solution
Freezing point depression = i * Kf * m = 2 * 1.86 * 1 = 3.72 °C (i = 2 for NaCl).
Correct Answer:
A
— 1.86 °C
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Q. What is the freezing point depression of a solution containing 1 mole of solute in 1 kg of water? (Kf for water = 1.86 °C kg/mol) (2020)
A.
1.86 °C
B.
3.72 °C
C.
0.93 °C
D.
2.78 °C
Show solution
Solution
Freezing point depression = Kf * m = 1.86 °C kg/mol * 1 mol/kg = 1.86 °C.
Correct Answer:
A
— 1.86 °C
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Q. What is the freezing point depression of a solution containing 3 moles of KCl in 1 kg of water? (Kf for water = 1.86 °C kg/mol) (2022)
A.
5.58 °C
B.
3.72 °C
C.
1.86 °C
D.
7.44 °C
Show solution
Solution
Freezing point depression = i * Kf * m = 3 * 1.86 * 3 = 5.58 °C (i = 2 for KCl).
Correct Answer:
A
— 5.58 °C
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Q. What is the general electronic configuration of alkali metals? (2022)
A.
ns^1
B.
ns^2
C.
ns^2np^1
D.
ns^2np^2
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Solution
The general electronic configuration of alkali metals is ns^1, where n is the principal quantum number.
Correct Answer:
A
— ns^1
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Q. What is the general formula for aldehydes? (2023)
A.
C_nH_(2n)
B.
C_nH_(2n+1)CHO
C.
C_nH_(2n+2)
D.
C_nH_(2n-1)CHO
Show solution
Solution
The general formula for aldehydes is C_nH_(2n+1)CHO, where n is the number of carbon atoms.
Correct Answer:
B
— C_nH_(2n+1)CHO
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Q. What is the hybridization of the nitrogen atom in amines? (2020)
A.
sp
B.
sp2
C.
sp3
D.
sp3d
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Solution
The nitrogen atom in amines is sp3 hybridized, as it forms three sigma bonds and has one lone pair.
Correct Answer:
C
— sp3
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Q. What is the IUPAC name for CH3-CH2-CH2-CHO? (2020)
A.
Butanal
B.
Propanal
C.
Pentanal
D.
Hexanal
Show solution
Solution
The IUPAC name for CH3-CH2-CH2-CHO is Butanal, as it has a four-carbon chain with an aldehyde functional group.
Correct Answer:
A
— Butanal
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Q. What is the IUPAC name for CH3-CH2-CH2-COOH? (2020)
A.
Butanoic acid
B.
Propanoic acid
C.
Pentanoic acid
D.
Hexanoic acid
Show solution
Solution
The IUPAC name for CH3-CH2-CH2-COOH is Butanoic acid, as it has four carbon atoms.
Correct Answer:
A
— Butanoic acid
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Q. What is the IUPAC name for CH3CH2COOH? (2021)
A.
Propanoic acid
B.
Butanoic acid
C.
Acetic acid
D.
Formic acid
Show solution
Solution
CH3CH2COOH is propanoic acid, which has a three-carbon chain with a carboxylic acid functional group.
Correct Answer:
A
— Propanoic acid
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Q. What is the IUPAC name of the carboxylic acid with the formula C3H6O2? (2023)
A.
Propanoic acid
B.
Butanoic acid
C.
Acetic acid
D.
Formic acid
Show solution
Solution
The IUPAC name of C3H6O2 is Propanoic acid, which has a three-carbon chain.
Correct Answer:
A
— Propanoic acid
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Q. What is the main characteristic of a molecular solid? (2021)
A.
High melting point
B.
Low melting point
C.
Good electrical conductivity
D.
High density
Show solution
Solution
Molecular solids generally have low melting points due to weak intermolecular forces.
Correct Answer:
B
— Low melting point
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Q. What is the main characteristic of amorphous solids? (2023)
A.
Long-range order
B.
Short-range order
C.
Definite melting point
D.
Anisotropic
Show solution
Solution
Amorphous solids lack long-range order, which distinguishes them from crystalline solids.
Correct Answer:
B
— Short-range order
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Q. What is the main component of the gas known as 'syngas'? (2023)
A.
Carbon dioxide
B.
Hydrogen
C.
Methane
D.
Nitrogen
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Solution
Syngas primarily consists of hydrogen and carbon monoxide, used in various chemical processes.
Correct Answer:
B
— Hydrogen
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Q. What is the main environmental concern associated with plastic waste? (2022)
A.
Air pollution
B.
Soil degradation
C.
Water contamination
D.
All of the above
Show solution
Solution
Plastic waste poses multiple environmental concerns, including air pollution from incineration, soil degradation, and water contamination.
Correct Answer:
D
— All of the above
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Showing 151 to 180 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!