101 Everyday Science MCQ'S
All Questions for: 101 Everyday Science MCQ'S
Question 1: Total charge on electron is?
- A
- B
- C
Explanation: - The elementary charge on a single electron is -1.6
Question 2: Vitamin ___ cannot be stored in Human Body.
- A D
- B None of these
- C A
Explanation: vitamin C Citrus fruits, is water soluble vitamin so it cannot be stored in human body . . green leafy vegetables and tomatoes are good source of
Question 3: The maximum number of electrons K orbit possesses?
- A 8
- B 4
- C 6
Explanation: , also known as the first electron shell. It can hold a maximum of 8 electrons. It can hold a maximum of The M orbit, also known as the 18 electrons. second electron shell. The K orbit third electron shell. It can hold a maximum of
Question 4: The earth has ______ types of movements at the same time.
- A 5
- B 3
- C 4
Explanation: The Earth moves in two primary motions: Rotation (spinning on its axis) and Revolution (orbiting around the Sun). Rotation causes day and night, while revolution leads to seasons.
Question 5: Atomic number of hydrogen is:
- A 2
- B 3
- C 4
Explanation: The correct answer to the question is: 4
Question 6: Which uranium atoms undergo fission readily?
- A U
- B U
- C None of these
Explanation: Uranium-235 (U
Question 7: Which is the longest and the strongest bone in human body?
- A Tibia
- B Femur
- C Stapes
Explanation: smallest bone is the stirrup Stapes The **** . (stapes) The lowest part of the backbone called the The longest bone is the Femur (one of the 3 small bones inside the ear). strongest bone
Question 8: The Mars has____ moons.
- A 4
- B 3
- C 5
Explanation: Mercury : 0 Venus : 0 Earth : 1 Mars : 2 Jupiter : 95 Saturn : 146 Uranus : 27
Question 9: The first stable product of dark reaction is ______ carbon molecule?
- A 4
- B 5
- C 6
Explanation: The first stable product of the dark reaction (Calvin cycle) is 3-phosphoglycerate (3-PGA), a 3-carbon compound. This occurs after CO? fixation by RuBisCO.
Question 10: An element has seven electrons in its valence shell, it's valency is _____?
- A None of these
- B 8
Explanation: An element with 7 valence electrons needs 1 more electron to complete its octet. Therefore, its valency is 1 , as it tends to gain 1 electron during bonding.
Question 11: The dimensions of kinetic energy are?
- A
- B ML
- C ML?
Explanation: KE = M
Question 12: Oxygen has 6 electrons in its valence shell so its valency is ______?
- A 18
- B 8
- C None of these
Explanation: Valency is the number of electrons an atom gains, loses, or shares to complete its octet. 2 Oxygen has 6 valence electrons and needs more to complete its octet,
Question 13: Iodine dissolves in water in the presence of KI due to formation of which of the following species?
- A I?
- B I?
- C I?
Explanation: This complex ion is the reason why iodine's solubility Iodine (I?) is not very soluble in water on its own due to its non-polar nature. However, when added to an aqueous solution of potassium iodide (KI), The iodide ions (I?) react with the iodine molecules to form a triiodide ion (I??), which is more soluble in water. significantly increases in the presence of KI.
Question 14: Time period of seconds pendulum is ______ second.
- A 0.5
- B 0.1
- C 1
Explanation: A seconds pendulum is defined as a pendulum with a time period of 2 seconds
Question 15: Which of the following contains four significant figures?
- A 0.035
- B 0.0010
- C None of these
Explanation: Rule 1 : Non-zero digits are always significant. In the number 1.035 , the digits 1, 3, and 5 are all non-zero and therefore significant. Rule 2 : Zeros between non-zero digits are significant. The four
Question 16: Night blindness is caused due to the deficiency of vitamin ______?
- A D
- B B
- C C
Explanation: One of the early signs of vitamin A deficiency is A deficiency of while Osteomalacia Rickets is caused by to to during an injury. Vitamin D deficiency of
Question 17: The ratio of ????/???? for a diatomic gas is equal to ______?
- A 1.67
- B 1.6
- C 1.5
Explanation: It is used in thermodynamic processes.
Question 18: Which of the following is a fat soluble vitamin?
- A C
- B B
- C None of these
Explanation: They are present in foods that A, D, E, and K are fat-soluble vitamins. liver and fat tissue Fat-soluble vitamins The body stores these vitamins in the are absorbed by the body along with dietary fats. Megadoses when they are not in use. contain fats. of fat-soluble vitamins can be toxic.
Question 19: A vitamin that affects vision in dim light is ______?
- A D
- B None of these
- C C
Explanation: Vitamin A is essential for the formation of rhodopsin, a pigment in the retina that helps with vision in dim light . Deficiency of Vitamin A can lead to night blindness.