General Science - Online Test
Q1. AIDS is caused by Human immuno deficiency virus (HIV) which is a member of group of virus called
Answer : Option B
Explaination / Solution:
Retrovirus, any of a group of viruses that belong to the family Retroviridae and that characteristically carry their genetic blueprint in the form of ribonucleic acid (RNA). Retroviruses are named for an enzyme known as reverse transcriptase, which was discovered independently in 1971 by American virologists Howard Temin and David Baltimore.
HIV virus belongs to this group as its genetic material is also RNA.
Q2. According to quantum mechanics ψ2(r) the wave function squared gives
Answer : Option D
Explaination / Solution:
Probability density of finding an electron at a point with in an atom, it is posible to predict region around the nucleus where electron can most probably be found.
ψ has no physical significance while ψ2 represnts the probability density of finding an electron.
Q3. An AC voltage source of variable angular frequency 'w' and fixed amplitude V0 is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When 'w' is increased:
Answer : Option D
Explaination / Solution:
in CR circuit, impedance
current
as increases, Z decreases. Hence the current i increases. Therefore, the bulb glows brighter.
Q4. Rapid growth of population at present time is due to-
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. The vestibular apparatus is composed of
Answer : Option B
Explaination / Solution:
The vestibular apparatus is composed of three semicircular canals and the otolith organ consisting of the saccule and utricle.
Q6. Market supply is best defined as
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. In which mode of heat transfer no medium is required?
Answer : Option D
Explaination / Solution:
Heat transfer through radiation takes place in form of electromagnetic waves.
Q8. The gas released during volcanic eruptions is :
Answer : Option C
Explaination / Solution:
CO2 is the second most abundant gas released in volcanic eruption after water vapours.
Q9. Which one of the following is an example of non – typical transition elements?
Answer : Option A
Explaination / Solution:
Zn, Cd and Hg are not considered as transition elements because they donot have incompletely filled d orbital in its ground state or stable oxidation state
Q10. Correlation refers to
Answer : Option A
Explaination / Solution:
Correlation between two variables shows how the two series are associated with each other. How one variable changes with the change in other
