General Science - Online Test
Q1. Which of the following ecological pyramid is always erect and upright :
Answer : Option B
Explaination / Solution:
The pyramid of energy is always erect in both terrestrial and aquatic ecosystems. It is so because the energy accumulated by producers by photosynthesis is not stored in their body totally as some part of the energy they produce is used to perform different activities. So the energy flow decreases from producers to top level of consumer.
Q2. According to Huygens principle
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. The giant planets Jupiter and Saturn consist mostly of
Answer : Option B
Explaination / Solution:
The name ‘gas giant’ was coined in 1952 by science fiction writer James Blish to refer to all the giant planets. The giant planets (Jupiter and Saturn) are huge gas balls, which is quite different than Earth and and other three rocky inner planets. Gas giants are primarily composed of gases, such as hydrogen and helium, and a much thicker layer of metallic hydrogen, along with a molten rocky core.
Unlike rocky planets, gas giants do not have a well-defined surface, and there is no clear boundary between where the atmosphere ends and the surface begins. In other words, you wouldn’t be able to land on these planets, as their atmospheres simply become gradually denser towards the core, perhaps with liquid or liquid-like states somewhere in between.
Q4. The oxidation number of Fe in K4[Fe(CN)6] is
Answer : Option B
Explaination / Solution:
CN has charge of –1 charge.
Q5. Polyploidy is induced through
Answer : Option B
Explaination / Solution:
Polyploidy is a condition in which multiple sets of chromosome is present in same cell in place of usual two sets (diploid). Cell division involves karyokinesis followed by cytokinesis. Colchicine prevents the cytokinesis that results the more than two sets of chromosome.
Q6. Far axial magnetic field of a solenoid as well as bar magnet vary
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. standard hydrogen electrode operated under standard conditions of 1 atm H2 pressure, 25°C, and pH = 0 has a cell potential of
Answer : Option A
Explaination / Solution:
Standard electrode potential of hydrogen electrode is taken as 0V.
Q8. If all the members of a host species die then all its unique parasites also die off, representing:
Answer : Option C
Explaination / Solution:
Coextinction and cothreatened refer to the phenomena of the loss or decline of a host species resulting in the loss or endangerment of other species that depend on it, potentially leading to cascading effects across trophic levels.
Q9. The direction of the universal gravitational force between particles of masses m1 and m2 is:
Answer : Option B
Explaination / Solution:
since gravitational force is attractive in nature, so if there are two particles of m1 & m2 .
So One Force will be on m1 which will be directed towards m 2. i.e
And other force wiil be on m2 which will be directed towards m 1 i.e
Clearly, It can be seen that Because thsese forces are attracted to each other and direction of each force is opposite to other one.
Q10. doping of semiconductor is the process of
Answer : Option B
Explaination / Solution:
Doping is the process of adding impurities to intrinsic semiconductors to alter their properties. Normally Trivalent and Pentavalent elements are used to dope Silicon and Germanium. When an intrinsic semiconductor is doped with Trivalent impurity it becomes a P-Type semiconductor.
