Railway RRB / NTPC - MCQ Practice Questions

What is the SI unit of electrical resistance?

At what temperature does water boil at standard atmospheric pressure?

Which gas is essential for respiration in humans?

What is the chemical formula of table salt?

Which organ in the human body is responsible for filtering blood and producing urine?

What is the acceleration due to gravity on Earth's surface?

Which of the following is a scalar quantity?

What is the process by which plants make their own food using sunlight?

Which metal is liquid at room temperature?

What is the speed of light in vacuum?

Which of the following vitamins helps in calcium absorption?

What is the process by which solids directly convert to gases without becoming liquids?

Which blood group is considered a universal donor?

What is the chemical formula for sulfuric acid?

In the context of Newton's Laws of Motion, which law states that action and reaction are equal and opposite?

Which of the following is an example of a heterogeneous mixture?

What is the Doppler effect primarily related to?

Which type of lens is used to correct myopia (short-sightedness)?

Which of the following statements about entropy is correct?

Which gas is primarily responsible for the greenhouse effect?