General Science - Online Test
Q1. Is light a particle or a wave?
Answer : Option A
Explaination / Solution:
Light is an electro magnetic wave, it has dual nature and behave as both particle and wave
Q2. Hydrogen has the simplest atomic structure among all the elements around us in Nature. Its electronic configuration is
Answer : Option C
Explaination / Solution:
As Hydrogen has 1 electron which fills in orbital of s subshell of First Shell.
Q3. Best method to increase crop yield is
Answer : Option D
Explaination / Solution:
Crop production can be increased by adopting a number of methods like using seeds of improved varieties, using modern method of agriculture, using fertilizers and pesticides. An improved seed variety is most important for better yield.
Q4. which of the following statements about earth's magnetism is correct
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. Electrochemistry is the study of production of electricity from
Answer : Option B
Explaination / Solution:
Electrochemistry is branch of chemistry that deals with production of electricity from a chemical reaction or carrying out a non spontaneous reaction using electricity.
Q6. Which of the following statements regarding utility is not true?
Answer : Option D
Explaination / Solution:
Utility is a subjective concept and varies from person to person, at different times and at different places. There cannot be a standardised measure for utility. Therefore, the point that utility always measurable is not true.
Q7. Speciation maintains biodiversity
Answer : Option C
Explaination / Solution:
Speciation, the formation of new and distinct species in the course of evolution. Speciation involves the splitting of a single evolutionary lineage into two or more genetically independent lineages.
Speciation maintains biodiversity both at species level and community level. New species develop from older species due to variation having more adaptive in changed habitat.
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Q8. Basic materials used in the present solid state electronic devices like diode, transistor, ICs, etc are
Answer : Option A
Explaination / Solution:
Semiconductors are materials that have electrical conductivity between conductors such as most metals and nonconductors or insulators like ceramics. Semiconductor material is used in the manufacturing of electrical components and used in electronic devices such as transistors and diodes.
Semiconductors are the basic materials used in the present solid state electronic devices like diode, transistor, ICs etc
Q9. According to Kepler’s Law of orbits:
Answer : Option A
Explaination / Solution:
The orbit of a planet around the Sun (or of a satellite around a planet) is not a perfect circle. It is an ellipse—a “flattened” circle. The Sun (or the centre of the planet) occupies one focus of the ellipse. A focus is one of the two internal points that help determine the shape of an ellipse. The distance from one focus to any point on the ellipse and then back to the second focus is always the same.
Q10. Octet of electrons, represents a particularly stable electronic arrangement.. Atoms achieve the stable octet when they are linked by chemical bonds. This rule is associated with one of the following theories
Answer : Option B
Explaination / Solution:
Lewis developed electronic theory of valence or theory of chemical bonding to explain the formation of chemical bond between the two atoms.
According to the electronic theory of valence, every atom tries to attain octet configuration (presence of eight electrons) in its valence shell by losing or gaining or by sharing of electrons. This is known as the "Octet Rule".
The electrostatic forces of attraction that holds the two oppositely charged ions together are known as "electrovalent bond".
