DAPZOI
Home Ask MCQ Quiz Topics Login


Science MCQ Questions & Answers

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

Plasmolysis occurs due to

A. Absorption
B. Endosmosis
C. Osmosis
D. Exosmosis

View Answer

Question 2

Amalgam is an alloy of

A. Copper and Tin
B. Mercury
C. Lead and Tin
D. Copper and Zinc

View Answer

Question 3

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

View Answer

Question 4

What is the scientific name for washing soda?

A. Sodium carbonate
B. Sodium bicarbonate
C. Calcium carbonate
D. Calcium bicarbonate

View Answer

Question 5

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

View Answer

Question 6

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

View Answer

Question 7

The gas usually filled in the electric bulb is

A. Hydrogen
B. Oxygen
C. Nitrogen
D. Carbon dioxide

View Answer

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

View Answer

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

View Answer

Question 10

The Ozone Layer restricts from

A. Infrared Rays
B. Radio waves
C. Ultraviolet Radiation
D. X-Rays and Gamma Rays

View Answer

Question 11

The layer of air around the earth is known as

A. Troposphere
B. Ionosphere
C. Atmosphere
D. Ozone layer

View Answer

Question 12

Entomology is the science that studies

A. Insects
B. Behavior of Human being's
C. Scientific Names
D. Formation of Rocks

View Answer

Question 13

The first synthetic fiber made by man was ____ ?

A. Rayon
B. Terrycot
C. Polyester
D. Nylon

View Answer

Question 14

The radioactive element most commonly detected in humans is

A. potassium-40
B. cobalt-60
C. iodine-131
D. plutonium-238

View Answer

Question 15

The first stage in the formation of coal is

A. Lignite
B. Bituminous
C. Anthracite
D. Peat

View Answer

Question 16

Hyoid is a

A. cavity
B. cartilage
C. bone
D. fluid

View Answer

Question 17

What is gastric acid present in the stomach composed of?

A. Hydrochloric acid
B. Sulphuric acid
C. Nitric acid
D. Lactic acid

View Answer

Question 18

Farmers neutralize the effect of acidity of the soil by adding

A. slaked lime
B. gypsum
C. caustic soda
D. baking soda

View Answer

Question 19

The longest cell in human body is

A. red blood cells
B. white blood cells
C. columnar epithelial cells
D. nerve cells

View Answer

Question 20

At what temperature is gypsum heated to form Plaster of Paris?

A. 90°C
B. 100°C
C. 110°C
D. 120°C

View Answer

Question 21

The study of fish culture is called

A. ophiology
B. herpetology
C. ichthyology
D. pisciculture

View Answer

Question 22

Combustion reactions are always

A. Exothermic
B. Endothermic
C. Sometimes exothermic
D. Both (A) and (B)

View Answer

Question 23

What is the first step in the refining of petroleum?

A. Distillation
B. Cooling
C. Drilling
D. Cracking

View Answer

Question 24

Fuse Wire is Made of?

A. An alloy of Tin and Lead
B. Nickel
C. Copper
D. An alloy of Nickel and Lead

View Answer

Question 25

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

View Answer

Question 26

Soil erosion can be prevented by

A. Removal of vegetation
B. Overgrazing
C. Afforestation
D. Increasing bird population

View Answer

Question 27

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

View Answer

Question 28

When a gas is turned into a liquid, the process is called

A. Condensation
B. Evaporation
C. Deposition
D. Sublimation

View Answer

Question 29

Environmental Science is the study of

A. Geography
B. Physics
C. Biology
D. All of the above

View Answer

Question 30

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

View Answer

Question 31

Tomato is a natural source of which acid?

A. Acetic acid
B. Citric acid
C. Tartaric acid
D. Oxalic acid

View Answer

Question 32

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

View Answer

Question 33

The most abundant metal in the earth’s crust is

A. Iron
B. Aluminium
C. Calcium
D. Sodium

View Answer

Question 34

Hypnology is the study of

A. Blood
B. Nerves
C. Sleep
D. Disease

View Answer

Question 35

A system which gets a continuous flow of energy is called

A. micropropagated system
B. closed system
C. open system
D. steady state

View Answer