Science GK Quiz for SSC Exams
The atomic number of carbon is 6, the atomic weight is 12. How many protons are there in the nucleus of carbon?
(A) 6
(B) 12
(C) 18
(D) 0
Correct Answer : A
Explanation :
Carbon-12: with 6 protons and 6 neutrons and an atomic mass of 12.
The mobility of conduction band electrons is greater than that of holes because
(A) they are light
(B) they collide less often
(C) they have negative charge
(D) they require less energy to move
Correct Answer : B
Explanation :
In a semiconductor the mobility of electrons (referring to 'conduction electrons' or 'free-electrons') is greater than that of a holes (indirectly referring to 'valence electrons') because of different band structure and scattering mechanisms of these two carrier types
The producers formed by the combustion of magnesium are -
(A) is acidic
(B) is indifferent
(C) alkaline
(D) all
Correct Answer : C
Explanation :
Therefore, the correct option is (C) Magnesium ribbon on burning in air produces: 'Magnesium oxide, heat and light'.
Which of these metals is found in liquid state?
(A) Iron
(B) Mercury
(C) Silver
(D) Others
Correct Answer : B
Explanation :
Mercury is the only metal that is liquid at normal temperatures.
The element absorbed in both cation and anion forms is:
(A) Sulfur
(B) Nitrogen
(C) Calcium
(D) Phosphorus
Correct Answer : B
Explanation :
Nitrogen is absorbed in both cationic (NH4+) and anionic (NO3-) form. Sulphur, phosphorus and boron are absorbed only in anionic forms.
Which of the following plants is not a collection organ of a stem?
(A) Sugarcane
(B) Ginger
(C) Potato
(D) Sweet potato
Correct Answer : D
Explanation :
Bryophytes. Bryophytes have no roots, leaves or stems. Moss and liverworts belong to this group. They are flowerless plants that grow in clumps.
In which branch do you study flowering plants?
(A) Cryptogames
(B) Phanerogames
(C) Bryophytes
(D) Pteridophytes
Correct Answer : B
Explanation :
Plant & flower science: Botany is the branch of biology that deals with plants. It involves the study of the structure and properties of plant life, including flowers and trees. Also included are plant classification and the study of the interactions of plants with their physical environment.
The monkey is placed in which of the following union?
(A) Mamlas
(B) Reptilia
(C) Insecta
(D) pieces
Correct Answer : A
Explanation :
A primate is any mammal of the group that includes lemurs, lorises, tarsiers, monkeys, apes, and humans. The order Primates, with its 300 or more species, is the third most diverse order of mammals, after rodents and bats.
What is the endosperm of the embryo helpful in?
(A) Respiration
(B) Protection
(C) Digestion
(D) Emissions
Correct Answer : D
Explanation :
An endosperm provides food and nourishment to the developing plant embryo in angiosperms.
Which of the following is a disease caused by bacteria?
(A) Titanus
(B) Malaria
(C) Poliomyelitis
(D) Filaria
Correct Answer : A
Explanation :
All of these diseases are caused by bacteria i.e. Pneumonia, Cholera, Tuberculosis. Cancer is caused by uncontrolled cell division. Pneumonia is caused by a bacterium Streptococcus pneumoniae. Cholera is caused by a bacterium Vibrio cholerae.
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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