Q. If a force of 10 N is applied to an object of mass 2 kg, what is its acceleration?
A.
2 m/s²
B.
5 m/s²
C.
10 m/s²
D.
20 m/s²
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Solution
Using F = ma, acceleration a = F/m = 10 N / 2 kg = 5 m/s².
Correct Answer:
B
— 5 m/s²
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Q. If a force of 10 N is applied to an object with a mass of 2 kg, what is its acceleration?
A.
2 m/s²
B.
5 m/s²
C.
10 m/s²
D.
20 m/s²
Show solution
Solution
Using F = ma, acceleration a = F/m = 10 N / 2 kg = 5 m/s².
Correct Answer:
B
— 5 m/s²
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Q. If a person walks at a speed of 5 km/h, how long will it take to walk 10 km? (2023)
A.
1 hour
B.
2 hours
C.
3 hours
D.
4 hours
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Solution
Time = Distance/Speed = 10 km/5 km/h = 2 hours
Correct Answer:
B
— 2 hours
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Q. If a train travels at a speed of 80 km/h, how far will it travel in 2.5 hours? (2023)
A.
150 km
B.
200 km
C.
250 km
D.
300 km
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Solution
Distance = Speed × Time = 80 km/h × 2.5 h = 200 km
Correct Answer:
C
— 250 km
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Q. If a vehicle travels 120 km in 2 hours, what is its average speed? (2023)
A.
50 km/h
B.
60 km/h
C.
70 km/h
D.
80 km/h
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Solution
Average Speed = Total Distance/Total Time = 120 km/2 h = 60 km/h
Correct Answer:
B
— 60 km/h
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Q. If an object is thrown upwards with a speed of 20 m/s, how high will it go before coming to rest? (g = 10 m/s²) (2023)
A.
20 m
B.
40 m
C.
80 m
D.
100 m
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Solution
Height = (Initial Speed)²/(2 × g) = (20 m/s)²/(2 × 10 m/s²) = 20 m
Correct Answer:
B
— 40 m
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Q. If the pH of a solution is 3, what is the concentration of hydrogen ions [H+] in moles per liter?
A.
0.001 M
B.
0.01 M
C.
0.1 M
D.
1 M
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Solution
The concentration of hydrogen ions [H+] is 10^(-pH) = 10^(-3) = 0.001 M.
Correct Answer:
C
— 0.1 M
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Q. If two forces of 5 N and 3 N act in the same direction, what is the resultant force?
A.
2 N
B.
5 N
C.
8 N
D.
10 N
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Solution
Resultant force = 5 N + 3 N = 8 N.
Correct Answer:
C
— 8 N
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Q. What is the basic structural and functional unit of the human body? (2020)
A.
Cell
B.
Tissue
C.
Organ
D.
System
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Solution
The basic structural and functional unit of the human body is the cell.
Correct Answer:
A
— Cell
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Q. What is the basic unit of force in the International System of Units (SI)? (2021)
A.
Newton
B.
Joule
C.
Pascal
D.
Watt
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Solution
The basic unit of force in the SI system is the Newton (N).
Correct Answer:
A
— Newton
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Q. What is the basic unit of life in the human body?
A.
Tissue
B.
Organ
C.
Cell
D.
System
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Solution
The basic unit of life in the human body is the cell.
Correct Answer:
C
— Cell
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Q. What is the boiling point of water at sea level? (2023)
A.
0°C
B.
50°C
C.
100°C
D.
150°C
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Solution
The boiling point of water at sea level is 100°C.
Correct Answer:
C
— 100°C
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Q. What is the chemical formula for sodium bicarbonate?
A.
NaCl
B.
NaOH
C.
NaHCO3
D.
Na2CO3
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Solution
The chemical formula for sodium bicarbonate is NaHCO3.
Correct Answer:
C
— NaHCO3
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Q. What is the chemical formula for sodium hydroxide? (2019)
A.
NaCl
B.
NaOH
C.
Na2SO4
D.
NaHCO3
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Solution
The chemical formula for sodium hydroxide is NaOH.
Correct Answer:
B
— NaOH
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Q. What is the chemical formula for water?
A.
H2O
B.
CO2
C.
O2
D.
H2O2
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Solution
The chemical formula for water is H2O.
Correct Answer:
A
— H2O
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Q. What is the chemical symbol for water? (2019)
A.
H2O
B.
O2
C.
CO2
D.
NaCl
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Solution
The chemical symbol for water is H2O, which indicates it is composed of two hydrogen atoms and one oxygen atom.
Correct Answer:
A
— H2O
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Q. What is the effect of acids on litmus paper? (2021)
A.
Turns blue to red
B.
Turns red to blue
C.
No effect
D.
Turns yellow
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Solution
Acids turn blue litmus paper red.
Correct Answer:
A
— Turns blue to red
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Q. What is the effect of adding an acid to a solution?
A.
Increases pH
B.
Decreases pH
C.
No effect
D.
Increases temperature
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Solution
Adding an acid decreases the pH of a solution.
Correct Answer:
B
— Decreases pH
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Q. What is the effect of adding an acid to water?
A.
pH increases
B.
pH decreases
C.
pH remains the same
D.
pH becomes neutral
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Solution
Adding an acid to water decreases the pH.
Correct Answer:
B
— pH decreases
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Q. What is the effect of increasing the voltage in a circuit? (2020)
A.
Increases current
B.
Decreases resistance
C.
Increases resistance
D.
Decreases current
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Solution
Increasing the voltage in a circuit increases the current, according to Ohm's Law.
Correct Answer:
A
— Increases current
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Q. What is the function of platelets in the blood?
A.
To transport oxygen
B.
To fight infections
C.
To help with blood clotting
D.
To carry nutrients
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Solution
Platelets are essential for blood clotting, helping to prevent excessive bleeding.
Correct Answer:
C
— To help with blood clotting
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Q. What is the function of the kidneys? (2020)
A.
Produce hormones
B.
Filter blood
C.
Digest food
D.
Regulate temperature
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Solution
The kidneys filter blood to remove waste and excess substances.
Correct Answer:
B
— Filter blood
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Q. What is the function of the respiratory system?
A.
To circulate blood
B.
To break down food
C.
To exchange gases
D.
To produce hormones
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Solution
The respiratory system is responsible for the exchange of gases, primarily oxygen and carbon dioxide, in the body.
Correct Answer:
C
— To exchange gases
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Q. What is the largest organ in the human body? (2020)
A.
Heart
B.
Liver
C.
Skin
D.
Lungs
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Solution
The largest organ in the human body is the skin.
Correct Answer:
C
— Skin
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Q. What is the main function of red blood cells in the human body?
A.
To fight infections
B.
To transport oxygen
C.
To digest food
D.
To regulate body temperature
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Solution
Red blood cells are primarily responsible for transporting oxygen from the lungs to the rest of the body.
Correct Answer:
B
— To transport oxygen
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Q. What is the main gas produced by plants during photosynthesis?
A.
Oxygen
B.
Carbon Dioxide
C.
Nitrogen
D.
Hydrogen
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Solution
Oxygen is the main gas produced by plants during photosynthesis.
Correct Answer:
A
— Oxygen
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Q. What is the main gas responsible for global warming? (2023)
A.
Oxygen
B.
Nitrogen
C.
Carbon Dioxide
D.
Helium
Show solution
Solution
Carbon Dioxide (CO2) is the main greenhouse gas responsible for global warming.
Correct Answer:
C
— Carbon Dioxide
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Q. What is the molarity of a solution if 2 moles of solute are dissolved in 4 liters of solution?
A.
0.5 M
B.
1 M
C.
2 M
D.
4 M
Show solution
Solution
Molarity (M) = moles of solute / liters of solution = 2 moles / 4 L = 0.5 M.
Correct Answer:
B
— 1 M
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Q. What is the most abundant element in the universe?
A.
Oxygen
B.
Hydrogen
C.
Carbon
D.
Helium
Show solution
Solution
Hydrogen is the most abundant element in the universe.
Correct Answer:
B
— Hydrogen
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Q. What is the pH level of pure water? (2020)
Show solution
Solution
The pH level of pure water is 7, which is considered neutral.
Correct Answer:
B
— 7
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Showing 31 to 60 of 101 (4 Pages)
Science Basics MCQ & Objective Questions
Understanding the fundamentals of Science is crucial for students preparing for school and competitive exams. Mastering Science Basics not only enhances your conceptual clarity but also boosts your confidence in tackling various exam formats. Practicing MCQs and objective questions helps you identify important questions and strengthens your exam preparation strategy.
What You Will Practise Here
Basic concepts of Physics, Chemistry, and Biology
Key formulas and their applications
Important definitions and terminologies
Diagrams and their significance in scientific understanding
Fundamental theories and laws in Science
Problem-solving techniques for objective questions
Common experiments and their outcomes
Exam Relevance
Science Basics is a vital topic in various examinations, including CBSE, State Boards, NEET, and JEE. Questions often focus on conceptual understanding and application of theories. Common patterns include multiple-choice questions that test your ability to apply knowledge in practical scenarios, making it essential to be well-versed with important Science Basics questions for exams.
Common Mistakes Students Make
Misinterpreting scientific terms and definitions
Overlooking the importance of units in calculations
Confusing similar concepts, such as energy types or chemical reactions
Neglecting to practice diagram-based questions
FAQs
Question: What are some effective ways to prepare for Science Basics MCQs?Answer: Regular practice of objective questions, reviewing key concepts, and understanding the application of theories are effective strategies.
Question: How can I improve my accuracy in answering Science Basics questions?Answer: Focus on understanding concepts rather than rote memorization, and practice with timed quizzes to enhance your speed and accuracy.
Start solving practice MCQs today to test your understanding and solidify your knowledge in Science Basics. Remember, consistent practice is the key to success in your exams!
