Q. What is the pH range of acidic solutions? (2023)
A.
0-7
B.
7-14
C.
14-20
D.
None of the above
Show solution
Solution
Acidic solutions have a pH range of 0 to 7.
Correct Answer:
A
— 0-7
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Q. What is the pH value of a neutral solution? (2020)
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Solution
A neutral solution has a pH value of 7, which is neither acidic nor basic.
Correct Answer:
B
— 7
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Q. What is the primary gas found in the Earth's atmosphere? (2023)
A.
Oxygen
B.
Carbon Dioxide
C.
Nitrogen
D.
Hydrogen
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Solution
Nitrogen makes up about 78% of the Earth's atmosphere, making it the primary gas.
Correct Answer:
C
— Nitrogen
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Q. What is the primary role of the digestive system?
A.
To circulate blood
B.
To break down food and absorb nutrients
C.
To protect against diseases
D.
To regulate body temperature
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Solution
The digestive system breaks down food into smaller components for nutrient absorption.
Correct Answer:
B
— To break down food and absorb nutrients
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Q. What is the primary role of the respiratory system?
A.
To circulate blood
B.
To exchange gases
C.
To digest food
D.
To produce hormones
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Solution
The respiratory system's primary role is to facilitate the exchange of oxygen and carbon dioxide.
Correct Answer:
B
— To exchange gases
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Q. What is the process by which plants make their food? (2023)
A.
Photosynthesis
B.
Respiration
C.
Transpiration
D.
Digestion
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Solution
Photosynthesis is the process by which plants convert sunlight into chemical energy, producing food.
Correct Answer:
A
— Photosynthesis
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Q. What is the relationship between current, voltage, and resistance called? (2021)
A.
Ohm's Law
B.
Kirchhoff's Law
C.
Faraday's Law
D.
Ampere's Law
Show solution
Solution
The relationship between current, voltage, and resistance is called Ohm's Law.
Correct Answer:
A
— Ohm's Law
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Q. What is the result of mixing equal volumes of 0.5 M HCl and 0.5 M NaOH?
A.
pH < 7
B.
pH = 7
C.
pH > 7
D.
No reaction
Show solution
Solution
The equal volumes of HCl and NaOH will neutralize each other, resulting in a pH of 7.
Correct Answer:
B
— pH = 7
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Q. What is the result of mixing hydrochloric acid (HCl) with sodium hydroxide (NaOH)?
A.
Salt and water
B.
Hydrogen gas
C.
Oxygen gas
D.
No reaction
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Solution
Mixing HCl with NaOH results in the formation of salt (NaCl) and water.
Correct Answer:
A
— Salt and water
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Q. What is the role of platelets in the body?
A.
To transport oxygen
B.
To fight infections
C.
To help with blood clotting
D.
To provide energy
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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 role of the heart in the circulatory system?
A.
To filter blood
B.
To produce hormones
C.
To pump blood
D.
To absorb nutrients
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Solution
The heart's primary role is to pump blood throughout the body, supplying oxygen and nutrients.
Correct Answer:
C
— To pump blood
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Q. What is the role of the immune system? (2022)
A.
Digest food
B.
Transport nutrients
C.
Fight diseases
D.
Regulate hormones
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Solution
The immune system's role is to fight diseases and protect the body from infections.
Correct Answer:
C
— Fight diseases
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Q. What is the speed of light in a vacuum (in km/s)?
A.
300,000
B.
150,000
C.
450,000
D.
600,000
Show solution
Solution
The speed of light in a vacuum is approximately 300,000 km/s.
Correct Answer:
A
— 300,000
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Q. What is the term for a substance that increases the concentration of hydrogen ions in a solution?
A.
Base
B.
Acid
C.
Salt
D.
Neutral
Show solution
Solution
An acid increases the concentration of hydrogen ions in a solution.
Correct Answer:
B
— Acid
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Q. What is the total resistance in a circuit with a 4 ohm and a 6 ohm resistor in series?
A.
2 ohms
B.
4 ohms
C.
6 ohms
D.
10 ohms
Show solution
Solution
Total resistance in series = R1 + R2 = 4 ohm + 6 ohm = 10 ohm.
Correct Answer:
D
— 10 ohms
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Q. What is the total resistance in a series circuit with resistors of 4Ω, 6Ω, and 10Ω?
A.
10Ω
B.
16Ω
C.
20Ω
D.
24Ω
Show solution
Solution
Total resistance in series = R1 + R2 + R3 = 4Ω + 6Ω + 10Ω = 20Ω.
Correct Answer:
B
— 16Ω
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Q. What is the unit of force? (2020)
A.
Newton
B.
Joule
C.
Pascal
D.
Watt
Show solution
Solution
The unit of force is Newton (N).
Correct Answer:
A
— Newton
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Q. What part of the brain controls balance and coordination?
A.
Cerebrum
B.
Cerebellum
C.
Brainstem
D.
Thalamus
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Solution
The cerebellum controls balance and coordination.
Correct Answer:
B
— Cerebellum
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Q. What type of energy is stored in a compressed spring? (2023)
A.
Kinetic energy
B.
Potential energy
C.
Thermal energy
D.
Chemical energy
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Solution
The energy stored in a compressed spring is potential energy.
Correct Answer:
B
— Potential energy
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Q. Which disease is caused by a deficiency of insulin? (2023)
A.
Diabetes
B.
Hypertension
C.
Asthma
D.
Cancer
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Solution
Diabetes is caused by a deficiency of insulin.
Correct Answer:
A
— Diabetes
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Q. Which gas is produced when an acid reacts with a metal? (2022)
A.
Oxygen
B.
Hydrogen
C.
Carbon dioxide
D.
Nitrogen
Show solution
Solution
Hydrogen gas is produced when an acid reacts with a metal.
Correct Answer:
B
— Hydrogen
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Q. Which law states that an object in motion stays in motion unless acted upon by an external force? (2023)
A.
Newton's First Law
B.
Newton's Second Law
C.
Newton's Third Law
D.
Law of Conservation of Energy
Show solution
Solution
Newton's First Law states that an object in motion stays in motion unless acted upon by an external force.
Correct Answer:
A
— Newton's First Law
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Q. Which of the following is a base? (2020)
A.
HCl
B.
NaOH
C.
H2SO4
D.
CH3COOH
Show solution
Solution
Sodium hydroxide (NaOH) is a common example of a base.
Correct Answer:
B
— NaOH
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Q. Which of the following is a characteristic of a solid? (2022)
A.
Definite shape
B.
Definite volume
C.
Incompressible
D.
All of the above
Show solution
Solution
Solids have a definite shape, definite volume, and are generally incompressible.
Correct Answer:
D
— All of the above
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Q. Which of the following is a conductor of electricity? (2021)
A.
Rubber
B.
Wood
C.
Copper
D.
Glass
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Solution
Copper is a good conductor of electricity, while rubber, wood, and glass are insulators.
Correct Answer:
C
— Copper
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Q. Which of the following is a non-renewable source of energy? (2020)
A.
Solar
B.
Wind
C.
Coal
D.
Hydro
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Solution
Coal is considered a non-renewable source of energy as it takes millions of years to form.
Correct Answer:
C
— Coal
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Q. Which of the following is a weak base?
A.
Sodium hydroxide
B.
Potassium hydroxide
C.
Ammonia
D.
Calcium hydroxide
Show solution
Solution
Ammonia is considered a weak base compared to the others listed.
Correct Answer:
C
— Ammonia
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Q. Which of the following substances is a base?
A.
Sodium chloride
B.
Ammonia
C.
Hydrochloric acid
D.
Sugar
Show solution
Solution
Ammonia is a base, while the others are not.
Correct Answer:
B
— Ammonia
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Q. Which of the following substances is a weak base?
A.
Sodium hydroxide
B.
Ammonia
C.
Potassium hydroxide
D.
Calcium hydroxide
Show solution
Solution
Ammonia is considered a weak base compared to the others, which are strong bases.
Correct Answer:
B
— Ammonia
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Q. Which organ in the human body is primarily responsible for detoxification? (2023)
A.
Heart
B.
Liver
C.
Kidney
D.
Lungs
Show solution
Solution
The liver is primarily responsible for detoxifying harmful substances in the body.
Correct Answer:
B
— Liver
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Showing 61 to 90 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!
