Everyday Science MCQS SET 1 for NTS,CSS,FPSC and all Competative Exams
Which is the outermost planet in the solar system?
A. Mercury
B. Pluto
C. Neptune
D. Uranus
Explanation: The outermost planet in the solar system was Neptune. It is excluded by scientists due to its very far distance.
Severe deficiency of Vitamin D results in __________.
A. scurvy
B. rickets
C. night blindness
D. None of these
Explanation: Severe deficiency of Vitamin D results in rickets.
Deficiency of Vitamin-A results in __________?
A. Night blindness
B. rickets
C. scurvy
D. hair fall
Explanation: Deficiency of Vitamin-A can lead to night blindness, which is characterized by difficulty seeing in low-light conditions or at night. Vitamin-A plays a crucial role in maintaining healthy vision and its deficiency can impair the functioning of the retina, leading to impaired night vision.
The SI unit of charge is __________?
A. Ampere
B. Coulomb
C. Ohm
D. Volt
Explanation: The SI unit of charge is the Coulomb. It is named after the French physicist Charles-Augustin de Coulomb, who made significant contributions to the field of electromagnetism. The Coulomb is defined as the amount of electric charge that flows through a conductor in one second when the current is one Ampere. It is the fundamental unit of electric charge in the International System of Units (SI).
Long-sight defect could be corrected by using __________ lens?
A. concave
B. Convex
C. diverging
D. none of these
Explanation: Long-sight defect, also known as hyperopia or farsightedness, can be corrected by using a convex lens. A convex lens is thicker in the middle and thinner at the edges. When placed in front of the eye, it helps to focus the light rays onto the retina, allowing for clearer vision of nearby objects. The convex lens helps to compensate for the shorter focal length of the eye in individuals with hyperopia, enabling them to see nearby objects more clearly.
The lifespan of Red Blood Cells is __________ days?
A. 60
B. 120
C. 180
D. 240
Explanation: The lifespan of red blood cells is approximately 120 days. Red blood cells, also known as erythrocytes, play a crucial role in transporting oxygen throughout the body. They have a limited lifespan and are constantly being produced and replaced by the bone marrow. After around 120 days, old red blood cells are removed from circulation by the spleen and liver, and new ones take their place to maintain a healthy balance.
For a fixed mass of gass at constant temperature, if we decrease volume, the pressure will _________?
A. also decrease
B. increase
C. remains constant
D. none of these
Explanation: For a fixed mass of gas at constant temperature, if we decrease the volume, the pressure will increase. This relationship is described by Boyle’s Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature. As the volume decreases, the gas molecules become more confined, resulting in more frequent collisions with the walls of the container, leading to an increase in pressure.
The density of water is __________?
A. 1 g/cm3
B. 1.5 g/cm3
C. 2 g/cm3
D. none of these
Explanation: The density of water is 1 g/cm3.
Radioactivity was discovered by __________?
A. Kelvin
B. Thomson
C. Rutherford
D. Bacquerel
Explanation: Radioactivity was discovered by Henri Becquerel in 1896. While conducting experiments with uranium salts, he observed that photographic plates placed near the materials became exposed without any external source of energy. This accidental discovery laid the foundation for the field of nuclear physics and led to further breakthroughs by scientists such as Marie Curie and Ernest Rutherford.
A device that converts chemical energy into electrical energy is called __________?
A. motor
B. generator
C. moving-coil meter
D. battery
Explanation: A device which converts chemical energy into electrical energy is called a battery. It consists of one or more electrochemical cells that store and release electrical energy through chemical reactions. Batteries are commonly used to power various devices and provide portable sources of electricity