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Basic Chemistry and Atomic Structure MCQs

Practice important Basic Chemistry and Atomic Structure MCQs with answers, explanations, theory links, and exam-focused preparation.

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Basic Chemistry and Atomic Structure

Basic Chemistry and Atomic Structure MCQs With Answers

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CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 6 and mass number 9. Number of neutrons is:
A. 2
B. 3
C. 5
D. 4
Correct Answer: B
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 5 and mass number 7. Number of neutrons is:
A. 2
B. 3
C. 1
D. 4
Correct Answer: A
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 4 and mass number 10. Number of neutrons is:
A. 5
B. 7
C. 6
D. 8
Correct Answer: C
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 3 and mass number 8. Number of neutrons is:
A. 4
B. 6
C. 5
D. 7
Correct Answer: C
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 2 and mass number 6. Number of neutrons is:
A. 4
B. 5
C. 3
D. 6
Correct Answer: A
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which compound is best identified by the following formula: H2O2?
A. Calcium carbonate
B. Nitric acid
C. Ammonia
D. Hydrogen peroxide
Correct Answer: D
The compound matching 'H2O2' is Hydrogen peroxide.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which formula is correctly associated with Hydrogen peroxide?
A. H2O2
B. CH4
C. H2SO4
D. C6H12O6
Correct Answer: A
Hydrogen peroxide is associated with H2O2.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which compound is best identified by the following formula: C2H5OH?
A. Ammonia
B. Ethanol
C. Sulfuric acid
D. Nitric acid
Correct Answer: B
The compound matching 'C2H5OH' is Ethanol.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which formula is correctly associated with Ethanol?
A. H2O
B. NaHCO3
C. C2H5OH
D. H2O2
Correct Answer: C
Ethanol is associated with C2H5OH.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which compound is best identified by the following formula: C6H12O6?
A. Calcium carbonate
B. Glucose
C. Carbon dioxide
D. Sulfuric acid
Correct Answer: B
The compound matching 'C6H12O6' is Glucose.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which formula is correctly associated with Glucose?
A. NH3
B. CH4
C. NaCl
D. C6H12O6
Correct Answer: D
Glucose is associated with C6H12O6.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which compound is best identified by the following formula: NaHCO3?
A. Glucose
B. Sodium bicarbonate
C. Carbon dioxide
D. Ethanol
Correct Answer: B
The compound matching 'NaHCO3' is Sodium bicarbonate.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which formula is correctly associated with Sodium bicarbonate?
A. CaCO3
B. H2O2
C. NaHCO3
D. CO2
Correct Answer: C
Sodium bicarbonate is associated with NaHCO3.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which compound is best identified by the following formula: CaCO3?
A. Calcium carbonate
B. Hydrogen peroxide
C. Glucose
D. Sodium chloride
Correct Answer: A
The compound matching 'CaCO3' is Calcium carbonate.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which formula is correctly associated with Calcium carbonate?
A. CaCO3
B. NaHCO3
C. CH4
D. C2H5OH
Correct Answer: A
Calcium carbonate is associated with CaCO3.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which compound is best identified by the following formula: NaCl?
A. Methane
B. Sodium chloride
C. Carbon monoxide
D. Sodium bicarbonate
Correct Answer: B
The compound matching 'NaCl' is Sodium chloride.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which formula is correctly associated with Sodium chloride?
A. C2H5OH
B. NaCl
C. CO
D. HNO3
Correct Answer: B
Sodium chloride is associated with NaCl.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which compound is best identified by the following formula: HNO3?
A. Calcium carbonate
B. Nitric acid
C. Sodium chloride
D. Ammonia
Correct Answer: B
The compound matching 'HNO3' is Nitric acid.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which formula is correctly associated with Nitric acid?
A. CaCO3
B. NaCl
C. HNO3
D. C6H12O6
Correct Answer: C
Nitric acid is associated with HNO3.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
Which compound is best identified by the following formula: HCl?
A. Methane
B. Glucose
C. Hydrochloric acid
D. Ethanol
Correct Answer: C
The compound matching 'HCl' is Hydrochloric acid.
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