General Science - Online Test
Q1. It is a process which is concerned with sale and purchase of commodities
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. Consider a system of three charges placed at points A, B and C, respectively, as shown in the figure. Take O to be the centre of the circle of radius R and angle CAB =
Answer : Option C
Explaination / Solution:
The electric field due to charges at A and B are equal and opposite, So at O the electric field is due to C only, which has a magnitude The potential energy of the system is not zero Force between B and C
Q3. An oil drop of 12 excess electrons is held stationary under a constant electric field of in Millikan’s oil drop experiment. The density of the oil is 1.26 g cm-3. Estimate the radius of the drop. (g = 9.81 m ; e = 1.60 × 10-19 C).
Answer : Option D
Explaination / Solution:
Density of oil, ρ = 1.26 gm/ = 1.26 × kg/ Acceleration due to gravity, g = 9.81 m Charge on an electron, e = 1.6 × C Radius of the oil drop = r Force (F) due to electric field E is equal to the weight of the oil drop (W) F = W Eq = mg Ene=mg Where,q = Net charge on the oil drop = ne m = Mass of the oil drop= Volume of the oil drop × Density of oil So 2.55×(12×1.6×)= 1.26X × So r = 9.82 × mm Therefore, the radius of the oil drop is 9.82 × mm.
Q4. The stage connecting meiosis I and meiosis II is
Answer : Option B
Explaination / Solution:
Interkinesis is the stage connecting meiosis I and meiosis II cell division. It is a brief period between two stages. No DNA synthesis occurs during this period. The cellundergoes preparation for next divisional stages.
Q5. Two geographical regions, separated by high mountain ranges are
Answer : Option C
Explaination / Solution:
The geographical region Palarctic and Oriental are separated by high mountain ranges. The geographical separation do not allow the gene flow as mating is not possible between member of species.
Q6. The famous botanical garden, Kew is located at
Answer : Option D
Explaination / Solution:
Kew Gardens is a botanical garden in southwest London that houses the "largest and most diverse botanical and mycological collections in the world"
Q7. Name the female condom introduced by Hindustan Latex and female health company of England in India.
Answer : Option A
Explaination / Solution:
Femidom is a female condom introduced by Hindustan latex and female health company of England in India. It is quite effective and prevents unwanted pregnancy along with sexually transmitted disease.
Q8. A parallel plate air filled capacitor shown in the Fig. (a) has a capacitance of 2 . When it is half filled with a dielectric of dielectric constant k = 3 as shown in Fig. (b), its capacitance becomes
Answer : Option D
Explaination / Solution:
The capacitance of the first capacitorThe second capacitor is considered to be made of two capacitors C1( air filled) and C2( dielectric) connected in series.
The equivalent capacitance
The equivalent capacitance
Q9. What does X replesent in the followwing diagram:
Answer : Option C
Explaination / Solution:
Figure shown above represent translation process in which protein is produced. Ribosome provide site for protein synthesis and t-RNA brings the amino acids. The ‘x’ is the polypeptide chain produced.
Q10. Assertion: Each spermatogonium is diploid and contains 46 chromosomes.
Reason: Some spermatogonia, primary spermatocytes complete the meiotic division to form four haploid cells.
Answer : Option D
Explaination / Solution:
Each spermatogonium is a diploid cell and contains 23 pairs of chromosomes. Some spermtogonia, called primary spermatocytes complete the first meiotic division to form two haploid cells. So, assertion is correct but reason is incorrect.
