General Science - Online Test
Q1. Matter can be classified at the macroscopic or bulk level as
Answer : Option C
Explaination / Solution:
At macroscopic level matter is classified as mixture or pure substances
.A mixture contains two or more components (in any ratio ) present in it , for example -- sugar solutions in water , tea , air , alloys like brass ,bronze etc.
Pure substances (viz. copper , silver , gold , water , glucose etc . ) have fixed composition .
The constituents of pure substances can not be separated by simple physical methods.
Q2. According to Kepler’s Law of areas,
Answer : Option A
Explaination / Solution:
Kepler law of areas describes the speed of a planet travelling in an elliptical orbit around the sun. A planet’s orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun’s gravitational pull, and the slower it moves in its orbit. So, statement of Kepler's law of area is "The line joining the sun to the planet sweeps out equal areas in equal interval of time". i.e. areal velocity is constant.
Q3. In the case of metals the valence and conduction bands have
Answer : Option C
Explaination / Solution:
The materials can be classified by the energy gap between their valence band and the conduction band. The valence band is the band consisting of the valence electron, and the conduction band remains empty. Conduction takes place when an electron jumps from valence band to conduction band and the gap between these two bands is forbidden energy gap. Wider the gap between the valence and conduction bands, higher the energy it requires for shifting an electron from valence band to the conduction band.
- In the case of conductors, this energy gap is absent or in other words conduction band, and valence band overlaps each other. Thus, electron requires minimum energy to jump from valence band. The typical examples of conductors are Silver, Copper, and Aluminium.
- In insulators, this gap is vast. Therefore, it requires a significant amount of energy to shift an electron from valence to conduction band. Thus, insulators are poor conductors of electricity. Mica and Ceramic are the well-known examples of insulation material.
- Semiconductors, on the other hand, have an energy gap which is in between that of conductors and insulators. This gap is typically more or less 1 eV, and thus, one electron requires energy more than conductors but less than insulators for shifting valence band to conduction band.
Q4. While a seller under perfect competition equates price and MC to maximize profits a monopolist should equate?
Answer : Option D
Explaination / Solution:
No Explaination.
Q5. Choose the odd one out based on coelom: Annelids, Molluscs, Platyhelminthes, Arthopods
Answer : Option B
Explaination / Solution:
Animals possessing coelom are called coelomates such as annelids, molluscs, arthropods, echinoderms, hemichordates and chordates.In Platyhelmites coelom is absent.
Q6. Inertness of noble gas was observed to be due to their electronic configurations: Choose the most appropriate
Answer : Option B
Explaination / Solution:
The six noble gases (Helium Neon Argon Krypton Xenon Radon) are found in group 18 of the periodic table. These elements were considered to be inert gases until the 1960's, because their oxidation number of 0 prevents the noble gases from forming compounds readily. All noble gases have the maximum number of electrons possible in their outer shell (2 for Helium, 8 for all others), making them stable.
Q7. Money is a medium of
Answer : Option D
Explaination / Solution:
Money is universally accepted as a medium of exchange. It can be used to buy anything worldwide.
Q8. In some plants anther and stigma mature at same time this condition is called
Answer : Option D
Explaination / Solution:
Homogamy – In this case the anther and stigmas of a bisexual flower mature simultaneously. The pollen grains reach the mature stigma either by contact, wind, gravity, rain drop or even insects. Self pollination brought about by contact is called direct autogamy and remaining agencies perform indirect autogamy.
Q9. Laspeyre’s index formula uses the weights of the
Answer : Option B
Explaination / Solution:
In case of calculating the price index, assuming that for individual item price at the base period.
Q10. Seminal plasma in human males is rich in
Answer : Option C
Explaination / Solution:
Seminal plasma along with sperms forms the semen. The seminal plasma provides nourishment to sperms and rich in fructose and calcium ions.
