Q. What is the molecular formula of ethyne? (2022)
A.
C2H2
B.
C2H4
C.
C2H6
D.
C3H4
Show solution
Solution
Ethyne, also known as acetylene, has the molecular formula C2H2.
Correct Answer:
A
— C2H2
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Q. What is the molecular formula of the simplest alkyne? (2022)
A.
C2H2
B.
C2H4
C.
C3H4
D.
C3H6
Show solution
Solution
The simplest alkyne is ethyne (acetylene) with the molecular formula C2H2.
Correct Answer:
A
— C2H2
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Q. What is the osmotic pressure of a 0.5 M NaCl solution at 25°C? (R = 0.0821 L·atm/(K·mol)) (2023)
A.
12.3 atm
B.
6.15 atm
C.
3.07 atm
D.
1.54 atm
Show solution
Solution
Osmotic pressure (π) = iCRT = 2 * 0.5 * 0.0821 * 298 = 24.5 atm. Therefore, π = 6.15 atm.
Correct Answer:
B
— 6.15 atm
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Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 L of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
2.03 atm
B.
1.96 atm
C.
0.82 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 mol)(0.0821 L·atm/(K·mol))(298 K) = 2.03 atm.
Correct Answer:
A
— 2.03 atm
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Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L atm/K mol) (2020)
A.
2.06 atm
B.
0.82 atm
C.
1.01 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 mol)(0.0821 L atm/K mol)(298 K) = 2.06 atm.
Correct Answer:
A
— 2.06 atm
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Q. What is the osmotic pressure of a solution containing 0.1 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
2.5 atm
B.
0.82 atm
C.
1.0 atm
D.
0.25 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.1 moles * 0.0821 * 298) / 1 = 2.5 atm.
Correct Answer:
A
— 2.5 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (2021)
A.
12.3 atm
B.
24.6 atm
C.
6.1 atm
D.
3.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles)(0.0821 L·atm/(K·mol))(298 K) = 12.3 atm.
Correct Answer:
B
— 24.6 atm
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Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2021)
A.
12.3 atm
B.
10.2 atm
C.
8.2 atm
D.
6.1 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (0.5 moles * 0.0821 L·atm/(K·mol) * 298 K) / 1 L = 12.3 atm.
Correct Answer:
B
— 10.2 atm
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Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (2021)
A.
0.0821 atm
B.
1.0 atm
C.
2.0 atm
D.
4.0 atm
Show solution
Solution
Osmotic pressure (π) = iCRT = 1 * 2 * 0.0821 * 298 = 4.0 atm (i = 1 for glucose).
Correct Answer:
C
— 2.0 atm
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Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
A.
0.82 atm
B.
1.64 atm
C.
2.46 atm
D.
4.92 atm
Show solution
Solution
Osmotic pressure (π) = nRT/V = (2 moles * 0.0821 L·atm/(K·mol) * 298 K) / 1 L = 4.92 atm.
Correct Answer:
B
— 1.64 atm
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Q. What is the oxidation state of nitrogen in NH4Cl? (2023)
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Solution
In NH4Cl, the oxidation state of nitrogen is -3, as it is bonded to four hydrogens.
Correct Answer:
A
— -3
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Q. What is the packing efficiency of a body-centered cubic (BCC) structure? (2020)
A.
52%
B.
68%
C.
74%
D.
100%
Show solution
Solution
The packing efficiency of a body-centered cubic (BCC) structure is approximately 68%.
Correct Answer:
B
— 68%
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Q. What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-3 M? (2019)
Show solution
Solution
pH = -log[H+] = -log(1 x 10^-3) = 3.
Correct Answer:
B
— 3
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Q. What is the primary active ingredient in aspirin? (2019)
A.
Acetylsalicylic acid
B.
Salicylic acid
C.
Acetic acid
D.
Benzoic acid
Show solution
Solution
Aspirin is chemically known as acetylsalicylic acid, which is used for pain relief and anti-inflammatory purposes.
Correct Answer:
A
— Acetylsalicylic acid
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Q. What is the primary benefit of probiotics? (2023)
A.
Increase weight
B.
Improve gut health
C.
Enhance vision
D.
Boost hair growth
Show solution
Solution
Probiotics are beneficial bacteria that improve gut health and aid in digestion.
Correct Answer:
B
— Improve gut health
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Q. What is the primary characteristic of a redox reaction? (2023)
A.
Transfer of protons
B.
Transfer of electrons
C.
Change in temperature
D.
Change in pressure
Show solution
Solution
The primary characteristic of a redox reaction is the transfer of electrons between species.
Correct Answer:
B
— Transfer of electrons
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Q. What is the primary characteristic of alkaline earth metals? (2020)
A.
They are highly reactive
B.
They have a +2 oxidation state
C.
They are gases at room temperature
D.
They form covalent bonds
Show solution
Solution
Alkaline earth metals typically have a +2 oxidation state due to the loss of two electrons.
Correct Answer:
B
— They have a +2 oxidation state
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Q. What is the primary characteristic of amorphous solids? (2023)
A.
Long-range order
B.
Short-range order
C.
Definite melting point
D.
High thermal conductivity
Show solution
Solution
Amorphous solids have short-range order but lack long-range order, unlike crystalline solids.
Correct Answer:
B
— Short-range order
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Q. What is the primary difference between physisorption and chemisorption? (2023)
A.
Physisorption is stronger than chemisorption
B.
Chemisorption involves chemical bonds, while physisorption involves van der Waals forces
C.
Physisorption is irreversible, while chemisorption is reversible
D.
Chemisorption occurs at lower temperatures than physisorption
Show solution
Solution
The primary difference is that chemisorption involves the formation of chemical bonds, while physisorption involves weaker van der Waals forces.
Correct Answer:
B
— Chemisorption involves chemical bonds, while physisorption involves van der Waals forces
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Q. What is the primary factor affecting the rate of a chemical reaction? (2022)
A.
Concentration
B.
Temperature
C.
Catalyst
D.
All of the above
Show solution
Solution
All of the above factors affect the rate of a chemical reaction.
Correct Answer:
D
— All of the above
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Q. What is the primary force holding the atoms together in covalent network solids? (2022)
A.
Ionic bonds
B.
Covalent bonds
C.
Metallic bonds
D.
Van der Waals forces
Show solution
Solution
Covalent network solids are held together by covalent bonds, forming a continuous network throughout the solid.
Correct Answer:
B
— Covalent bonds
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Q. What is the primary force holding together the atoms in a metallic solid? (2020)
A.
Ionic bonds
B.
Covalent bonds
C.
Metallic bonds
D.
Van der Waals forces
Show solution
Solution
Metallic solids are held together by metallic bonds, which involve a 'sea' of delocalized electrons around positively charged metal ions.
Correct Answer:
C
— Metallic bonds
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Q. What is the primary force holding together the atoms in metallic solids? (2020)
A.
Ionic bonds
B.
Covalent bonds
C.
Metallic bonds
D.
Van der Waals forces
Show solution
Solution
Metallic solids are held together by metallic bonds, which involve a 'sea of electrons' that are free to move.
Correct Answer:
C
— Metallic bonds
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Q. What is the primary function of antibiotics? (2020)
A.
Pain relief
B.
Bacterial infection treatment
C.
Viral infection treatment
D.
Fungal infection treatment
Show solution
Solution
Antibiotics are primarily used to treat bacterial infections by inhibiting the growth of bacteria.
Correct Answer:
B
— Bacterial infection treatment
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Q. What is the primary function of antioxidants in food? (2022)
A.
Enhance flavor
B.
Preserve color
C.
Prevent oxidation
D.
Increase sweetness
Show solution
Solution
Antioxidants prevent oxidation, which can lead to spoilage and degradation of food quality.
Correct Answer:
C
— Prevent oxidation
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Q. What is the primary function of antioxidants in the body? (2020)
A.
Increase energy
B.
Prevent oxidation
C.
Enhance digestion
D.
Boost immunity
Show solution
Solution
Antioxidants prevent oxidation by neutralizing free radicals, thus protecting cells from damage.
Correct Answer:
B
— Prevent oxidation
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Q. What is the primary function of antioxidants in the human body? (2020)
A.
Increase energy
B.
Prevent oxidation
C.
Enhance digestion
D.
Boost immunity
Show solution
Solution
Antioxidants prevent oxidation, which can lead to cellular damage and contribute to various diseases.
Correct Answer:
B
— Prevent oxidation
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Q. What is the primary function of cholesterol in the body? (2023)
A.
Energy storage
B.
Hormone production
C.
Protein synthesis
D.
Carbohydrate metabolism
Show solution
Solution
Cholesterol is essential for the production of hormones, including steroid hormones and vitamin D.
Correct Answer:
B
— Hormone production
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Q. What is the primary oxidation state of carbon in carbon dioxide (CO2)? (2020)
Show solution
Solution
In carbon dioxide, carbon has an oxidation state of +4.
Correct Answer:
B
— +4
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Q. What is the primary oxidation state of iron in FeCl3? (2023)
Show solution
Solution
In FeCl3, iron (Fe) has a primary oxidation state of +3.
Correct Answer:
B
— +3
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Showing 211 to 240 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!
