Science MCQs : This section focuses on the "Science". These Multiple Choice Questions (MCQs) should be practiced to improve the Science skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
A. Temperature of the solution decreases
B. Temperature of the solution increases
C. Temperature of the solution remains the same
D. Salt formation takes place
Question 2
Tomato is a natural source of which acid?
A. Acetic acid
B. Citric acid
C. Tartaric acid
D. Oxalic acid
Question 3
At what temperature is gypsum heated to form Plaster of Paris?
A. 90°C
B. 100°C
C. 110°C
D. 120°C
Question 4
Myopia and hypermetropia can be corrected by
A. Concave and plano-convex lens
B. Concave and convex lens
C. Convex and concave lens
D. Plano-concave lens for both defects
Question 5
The image formed on the retina of the human eye is
A. virtual and inverted
B. real and inverted
C. real and erect
D. virtual and erect
Question 6
The most abundant metal in the earth’s crust is
A. Iron
B. Aluminium
C. Calcium
D. Sodium
Question 7
Amalgam is an alloy of
A. Copper and Tin
B. Mercury
C. Lead and Tin
D. Copper and Zinc
Question 8
Dead organisms are transformed into petroleum and natural gas in
A. presence of air
B. absence of air
C. presence of sunlight
D. none of the above
Question 9
Wind is caused due to
A. uneven heating of earth’s surface
B. rotation of earth
C. local conditions
D. All of these
Question 10
The study of fish culture is called
A. ophiology
B. herpetology
C. ichthyology
D. pisciculture
Question 11
A system which gets a continuous flow of energy is called
A. micropropagated system
B. closed system
C. open system
D. steady state
Question 12
Taxonomic studies depends on
A. Ecological information of organisms
B. Structure of cell and development process of organisms
C. External and internal structure of organisms
D. All of the above
Question 13
Plasmolysis occurs due to
A. Absorption
B. Endosmosis
C. Osmosis
D. Exosmosis
Question 14
The longest cell in human body is
A. red blood cells
B. white blood cells
C. columnar epithelial cells
D. nerve cells
Question 15
Hyoid is a
A. cavity
B. cartilage
C. bone
D. fluid
Question 16
Combustion reactions are always
A. Exothermic
B. Endothermic
C. Sometimes exothermic
D. Both (A) and (B)
Question 17
Sodium carbonate is a basic salt because it is a salt of
A. strong acid and strong base
B. weak acid and weak base
C. strong acid and weak base
D. weak acid and strong base
Question 18
Farmers neutralize the effect of acidity of the soil by adding
A. slaked lime
B. gypsum
C. caustic soda
D. baking soda
Question 19
One of the constituents of baking powder is sodium hydrogen carbonate, the other constituent is
A. hydrochloric acid
B. tartaric acid
C. acetic acid
D. sulphuric acid
Question 20
What is gastric acid present in the stomach composed of?
A. Hydrochloric acid
B. Sulphuric acid
C. Nitric acid
D. Lactic acid
Question 21
The blue color of the clear sky is due to
A. Diffraction of light
B. Dispersion of light
C. Reflection of light
D. Refraction of light
Question 22
The Ozone Layer restricts from
A. Infrared Rays
B. Radio waves
C. Ultraviolet Radiation
D. X-Rays and Gamma Rays
Question 23
When a gas is turned into a liquid, the process is called
A. Condensation
B. Evaporation
C. Deposition
D. Sublimation
Question 24
What is the scientific name for washing soda?
A. Sodium carbonate
B. Sodium bicarbonate
C. Calcium carbonate
D. Calcium bicarbonate
Question 25
The first synthetic fiber made by man was ____ ?
A. Rayon
B. Terrycot
C. Polyester
D. Nylon
Question 26
The layer of air around the earth is known as
A. Troposphere
B. Ionosphere
C. Atmosphere
D. Ozone layer
Question 27
What is the first step in the refining of petroleum?
A. Distillation
B. Cooling
C. Drilling
D. Cracking
Question 28
Entomology is the science that studies
A. Insects
B. Behavior of Human being's
C. Scientific Names
D. Formation of Rocks
Question 29
Soil erosion can be prevented by
A. Removal of vegetation
B. Overgrazing
C. Afforestation
D. Increasing bird population
Question 30
Fuse Wire is Made of?
A. An alloy of Tin and Lead
B. Nickel
C. Copper
D. An alloy of Nickel and Lead
Question 31
The first stage in the formation of coal is
A. Lignite
B. Bituminous
C. Anthracite
D. Peat
Question 32
Environmental Science is the study of
A. Geography
B. Physics
C. Biology
D. All of the above
Question 33
Hypnology is the study of
A. Blood
B. Nerves
C. Sleep
D. Disease
Question 34
The gas usually filled in the electric bulb is
A. Hydrogen
B. Oxygen
C. Nitrogen
D. Carbon dioxide
Question 35
The radioactive element most commonly detected in humans is
A. potassium-40
B. cobalt-60
C. iodine-131
D. plutonium-238