Chemistry (MHT-CET)

Alcohols & Phenols Aldehydes & Ketones Amines Atomic Structure Biomolecules Carboxylic Acids Chemical Bonding Chemical Equilibrium Chemical Kinetics Coordination Compounds d & f-block Elements Electrochemistry Haloalkanes Hydrocarbons Ionic Equilibrium Mole Concept Organic Chemistry Basics p-Block Elements Periodic Table Polymers Redox Reactions Solutions States of Matter Surface Chemistry Thermodynamics

Q. What is the number of moles in 500 mL of a 2 M NaCl solution? (2023)

A. 1
B. 0.5
C. 2
D. 0.25

Solution

Moles = Molarity x Volume (L) = 2 moles/L x 0.5 L = 1 mole.

Correct Answer: A — 1

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Q. What is the oxidation state of chlorine in NaClO3? (2022) 2022

A. +1
B. +3
C. +5
D. +7

Solution

In NaClO3, the oxidation state of chlorine is +5. Sodium is +1 and each oxygen is -2, leading to the equation: +1 + x + 3(-2) = 0, solving gives x = +5.

Correct Answer: C — +5

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Q. What is the oxidation state of chromium in K2Cr2O7? (2021) 2021

A. +3
B. +6
C. +2
D. +5

Solution

In K2Cr2O7, the total charge from potassium (K) is +2, and oxygen (O) contributes -14. Let the oxidation state of Cr be x. The equation is 2x - 14 + 2 = 0, solving gives x = +6.

Correct Answer: B — +6

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Q. What is the oxidation state of nitrogen in NH4+? (2020) 2020

A. -3
B. 0
C. +1
D. +3

Solution

In NH4+, nitrogen has an oxidation state of -3. Each hydrogen is +1, leading to the equation: x + 4(+1) = +1, solving gives x = -3.

Correct Answer: A — -3

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Q. What is the oxidation state of phosphorus in phosphoric acid (H3PO4)? (2020) 2020

A. +3
B. +5
C. 0
D. -3

Solution

In H3PO4, phosphorus has an oxidation state of +5.

Correct Answer: B — +5

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Q. What is the oxidation state of sulfur in H2SO4? (2021) 2021

A. +6
B. +4
C. +2
D. 0

Solution

In H2SO4, the oxidation state of sulfur is +6. Each hydrogen is +1 and each oxygen is -2, leading to the equation: 2(+1) + x + 4(-2) = 0, solving gives x = +6.

Correct Answer: A — +6

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Q. What is the oxidation state of sulfur in H2SO4? (2023) 2023

A. +2
B. +4
C. +6
D. 0

Solution

In H2SO4, the oxidation state of sulfur is +6.

Correct Answer: C — +6

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Q. What is the percentage by mass of a solution containing 15 grams of solute in 85 grams of solvent? (2021)

A. 15%
B. 17.65%
C. 20%
D. 25%

Solution

Percentage by mass = (mass of solute / total mass) × 100 = (15 g / (15 g + 85 g)) × 100 = 17.65%.

Correct Answer: B — 17.65%

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Q. What is the percentage concentration of a solution containing 15 g of solute in 150 g of solution? (2023)

A. 10%
B. 15%
C. 20%
D. 25%

Solution

Percentage concentration = (mass of solute / mass of solution) × 100 = (15 g / 150 g) × 100 = 10%

Correct Answer: B — 15%

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Q. What is the percentage concentration of a solution containing 20 g of solute in 200 g of solution? (2021)

A. 10%
B. 20%
C. 5%
D. 15%

Solution

Percentage concentration = (mass of solute / mass of solution) × 100 = (20 g / 200 g) × 100 = 10%.

Correct Answer: A — 10%

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Q. What is the period number of Argon? (2020)

A. 2
B. 3
C. 4
D. 5

Solution

Argon is located in Period 3 of the periodic table.

Correct Answer: C — 4

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Q. What is the period number of Lithium in the periodic table? (2022)

A. 1
B. 2
C. 3
D. 4

Solution

Lithium is located in period 2 of the periodic table.

Correct Answer: B — 2

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Q. What is the period number of Lithium? (2016) 2016

A. 1
B. 2
C. 3
D. 4

Solution

Lithium is located in period 2 of the periodic table.

Correct Answer: B — 2

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Q. What is the period number of Sodium in the periodic table? (2017)

A. 1
B. 2
C. 3
D. 4

Solution

Sodium is in period 3 of the periodic table.

Correct Answer: C — 3

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Q. What is the pH of a 0.001 M acetic acid solution (Ka = 1.8 x 10^-5)?

A. 2.87
B. 3.87
C. 4.87
D. 5.87

Solution

Using the formula for weak acids, pH = 0.5(pKa - logC) = 0.5(4.74 - log(0.001)) = 3.87.

Correct Answer: B — 3.87

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Q. What is the pH of a 0.001 M solution of hydrochloric acid?

A. 3
B. 4
C. 5
D. 6

Solution

pH = -log(0.001) = 3.

Correct Answer: A — 3

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Q. What is the pH of a 0.01 M HCl solution? (2021) 2021

A. 1
B. 2
C. 3
D. 4

Solution

For a strong acid like HCl, pH = -log[H+] = -log(0.01) = 2.

Correct Answer: A — 1

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Q. What is the pH of a 0.01 M solution of Na2CO3?

A. 10
B. 11
C. 12
D. 9

Solution

Na2CO3 is a basic salt, pH is approximately 11.5.

Correct Answer: C — 12

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Q. What is the pH of a 0.01 M solution of NaOH?

A. 12
B. 13
C. 14
D. 11

Solution

pOH = -log(0.01) = 2; pH = 14 - pOH = 14 - 2 = 12.

Correct Answer: B — 13

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Q. What is the pH of a 0.01 M solution of phosphoric acid (H3PO4)?

A. 1.0
B. 2.0
C. 3.0
D. 4.0

Solution

H3PO4 is a triprotic acid; for a dilute solution, the first dissociation dominates, giving pH ≈ 2.

Correct Answer: B — 2.0

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Q. What is the pH of a 0.05 M acetic acid solution (Ka = 1.8 x 10^-5)? (2023)

A. 2.9
B. 3.1
C. 4.0
D. 4.7

Solution

Using the formula for weak acids, pH = 0.5(pKa - log[C]) where pKa = -log(1.8 x 10^-5) ≈ 4.74. pH = 0.5(4.74 - log(0.05)) ≈ 4.7.

Correct Answer: D — 4.7

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Q. What is the pH of a 0.05 M solution of NaCl?

A. 7
B. 6
C. 8
D. 5

Solution

NaCl is a neutral salt, so the pH remains 7.

Correct Answer: A — 7

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Q. What is the pH of a 0.1 M solution of ammonium chloride (NH4Cl)? (2019) 2019

A. 5.10
B. 4.75
C. 6.00
D. 7.00

Solution

NH4Cl is a salt of a weak base and strong acid, pH < 7. Calculate using hydrolysis: pH ≈ 4.75.

Correct Answer: B — 4.75

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Q. What is the pH of a 0.1 M solution of K2CO3?

A. 9.0
B. 10.0
C. 11.0
D. 12.0

Solution

K2CO3 is a salt of a weak acid (H2CO3) and strong base (KOH), resulting in a basic solution with pH around 10.

Correct Answer: B — 10.0

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Q. What is the pH of a 0.1 M solution of K2SO4? (2023)

A. 7
B. 6
C. 8
D. 5

Solution

K2SO4 is a neutral salt formed from a strong acid (H2SO4) and a strong base (KOH). Therefore, the pH of the solution is 7.

Correct Answer: A — 7

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Q. What is the pH of a 0.1 M solution of NH4Cl?

A. 5
B. 6
C. 7
D. 8

Solution

NH4Cl is an acidic salt, pH is approximately 5.1.

Correct Answer: B — 6

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Q. What is the pH of a 0.1 M solution of sodium acetate (Ka for acetic acid = 1.8 x 10^-5)?

A. 4.75
B. 5.25
C. 9.25
D. 10.25

Solution

Using the formula for salt of weak acid, pH = 14 + 0.5(pKa + logC) = 14 + 0.5(4.74 + log(0.1)) = 9.25.

Correct Answer: C — 9.25

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Q. What is the pH of a 0.1 M solution of sodium bicarbonate (NaHCO3)? (2022) 2022

A. 8.00
B. 9.00
C. 7.00
D. 6.00

Solution

NaHCO3 is a weak base, pH ≈ 8.00 due to its bicarbonate ion acting as a weak base.

Correct Answer: A — 8.00

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Q. What is the pH of a 0.1 M solution of sulfuric acid (H2SO4)?

A. 1
B. 2
C. 3
D. 4

Solution

H2SO4 is a strong acid; it dissociates completely, so [H+] = 0.1 M; pH = -log(0.1) = 1.

Correct Answer: B — 2

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Q. What is the pH of a buffer solution made from 0.1 M acetic acid and 0.1 M sodium acetate? (2023)

A. 4.74
B. 5.00
C. 5.74
D. 6.00

Solution

Using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]) = 4.74 + log(1) = 4.74.

Correct Answer: A — 4.74

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Chemistry (MHT-CET) MCQ & Objective Questions

Chemistry is a crucial subject for students preparing for the MHT-CET exam, as it forms a significant part of the syllabus. Mastering Chemistry through practice questions and MCQs not only enhances your understanding but also boosts your confidence for the exam. Engaging with objective questions helps identify important concepts and improves your problem-solving skills, making it easier to score better in your exams.

What You Will Practise Here

Basic concepts of Chemistry: Atoms, Molecules, and Stoichiometry
Periodic Table: Trends and properties of elements
Chemical Bonding: Types of bonds and molecular geometry
Thermodynamics: Laws and applications in chemical reactions
Equilibrium: Concepts of chemical and ionic equilibrium
Organic Chemistry: Functional groups and reaction mechanisms
Environmental Chemistry: Impact of chemicals on the environment

Exam Relevance

Chemistry is a vital component in various examinations such as CBSE, State Boards, NEET, and JEE. In these exams, questions often focus on conceptual understanding and application of theories. Common patterns include multiple-choice questions that test your knowledge of definitions, formulas, and the ability to solve numerical problems. Familiarity with these patterns through practice can significantly enhance your performance.

Common Mistakes Students Make

Misunderstanding the periodic trends and their implications
Confusing different types of chemical bonds and their properties
Overlooking the significance of units in thermodynamic calculations
Neglecting to balance chemical equations correctly
Struggling with organic reaction mechanisms due to lack of practice

FAQs

Question: What are the best ways to prepare for Chemistry (MHT-CET) MCQs?
Answer: Regular practice of MCQs, understanding key concepts, and revising important formulas are essential for effective preparation.

Question: How can I improve my speed in solving Chemistry objective questions?
Answer: Time yourself while practicing and focus on solving questions efficiently to improve your speed.

Don't wait any longer! Start solving practice MCQs today to test your understanding and solidify your knowledge in Chemistry. Your success in the MHT-CET exam is just a few practice questions away!

Chemistry (MHT-CET)

Chemistry (MHT-CET) MCQ & Objective Questions

What You Will Practise Here

Exam Relevance

Common Mistakes Students Make

FAQs

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