NEET Chemistry MCQ: NCERT Empirical & Molecular Formula | NEET.Guide Questions

A hydrocarbon contains 85.7% carbon. Its molecular mass is 42. The molecular formula of the compound is:

A

C2H4

B

C3H6

C

C4H8

D

C2H6

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Empirical Formula, Molecular Formula, Percentage Composition

Related Questions

A compound contains 40% carbon, 6.67% hydrogen, and 53.33% oxygen. Its empirical formula is:

A

CH2O

B

C2H4O2

C

CHO

D

C2H4O

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Empirical Formula, Percentage Composition

If the empirical formula of a compound is CH and its molecular weight is 78, what is its molecular formula?

A

C $_2$ H $_2$

B

C $_4$ H $_4$

C

C $_6$ H $_6$

D

C $_8$ H $_8$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Empirical Formula, Molecular Formula, Molecular Weight

The simplest formula of a compound containing of element X and of element Y is

A

XY

B

${X_2}Y$

C

$X{Y_3}$

D

${X_2}{Y_3}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :mole concept, empirical formula, stoichiometry

What is the empirical formula of a compound containing 80% carbon and 20% hydrogen?

A

CH

B

CH $_2$

C

CH $_3$

D

CH $_4$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Empirical Formula, Percentage Composition

If a compound consists of 92.3% carbon and 7.7% hydrogen by weight, what is its empirical formula? (Atomic weights: C = 12, H = 1)

A

C2H2

B

CH

C

CH2

D

C2H4

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

PYQ YEAR: 2021

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :Stoichiometry, Empirical Formula

Empirical formula of glucose is

A

${C_6}{H_{12}}{O_6}$

B

${C_3}{H_6}{O_3}$

C

${C_2}{H_4}{O_2}$

D

$C{H_2}O$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Empirical Formula, Chemical Formula, Simplifying Ratios

An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of C is 12, H is 1]

A

CH4

B

C2H6

C

C3H10

D

C2H4

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :empirical formula, mass percentage, mole concept

Which of the following represents an empirical formula?

A

C $_6$ H $_{12}$ O $_6$

B

C $_2$ H $_4$ O $_2$

C

N $_2$ O $_4$

D

CH $_2$ O

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Empirical Formula

An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular formula of compound is

A

C₃H₅O₂

B

C₆H₁₀O₄

C

C₅H₈O₃

D

C₄H₆O₄

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :3 mins

🔄Ncert Concepts :percentage composition, empirical formula, molecular formula, vapour density

The empirical formula of naphthalene is:

A

${\rm{C}}{{\rm{H}}_2}$

B

${{\rm{C}}_5}{{\rm{H}}_4}$

C

${{\rm{C}}_2}{\rm{H}}$

D

${{\rm{C}}_n}{{\rm{H}}_{2n}}$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Some Basic Concepts in Chemistry

🎯Topic:Emprirical Formula & Molecular Formula

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :empirical formula, molecular formula, ratio of atoms

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