General Science - Online Test
Q1. Under the influence of the coulomb field of charge +Q, a charge −q is moving around it in an elliptical orbit. Find out the correct statement(s).
Answer : Option A
Explaination / Solution:
Since the charge –q is moving in elliptical orbit so to make its motion stable the total angular momentum of the charge is constant since it experience a centripetal force from the charge +Q so it follow the motion as the motion of earth around sun.
Q2. In meiosis
Answer : Option D
Explaination / Solution:
Meiosis cell division consists of two phases. First phase is called meiosis I during which number of chromosome reduce to half the number in parent cells. In meiosis II chromosome number remain same.
Q3. In which condition gene ratio remains constant in a species?
Answer : Option A
Explaination / Solution:
Gene ratio remains constant in species having random mating. Gene flow, mutation and sexual selection are the factors that change the gene ratio of the population.
Q4. Larger animals like birds and mammals are usually stuffed and preserved in
Answer : Option D
Explaination / Solution:
Larger animals like birds and mammals are usually stuffed and preserved in museum. Hence, the correct choice is Museum.
Q5. Birth control measure should be
Answer : Option D
Explaination / Solution:
Good birth control measure should be easily available and cheaper. There should be not interference with sexual desire without any side effect.
Q6. Three capacitors, each of capacitance C = 3 mF, are connected as shown in the figure. The equivalent capacitance between points P and S is
Answer : Option A
Explaination / Solution:
If P is at positive potential, then Q is at negative potential and R is at positive potential. The system therefore reduces to 3 capacitors in parallel. C= 9μF
If P is at positive potential, then Q is at negative potential and R is at positive potential. The system therefore reduces to 3 capacitors in parallel. C= 9μF
Q7. Production of a human protein in bacteria by genetic engineering is possible because
Answer : Option C
Explaination / Solution:
Human protein can be produced in bacteria by genetic engineering because genetic code is universal i.e. same codon in different organism’s code for same amino acids.
Q8. Identify the false statement out of the following
Answer : Option C
Explaination / Solution:
Androgen hormone is produced from leydig cells. Sertoli cells provide nutrition to spermatozoa or sperm and menstrual cycle get stopped during pregnancy.
Q9. Which one represents regulative function of forests
Answer : Option B
Explaination / Solution:
The regulative function of forest is storage and release of gases. Plants in forests converts carbon dioxide gas into oxygen during photosynthesis.
Q10. Boron forms only covalent compounds and not +3 ions because
Answer : Option C
Explaination / Solution:
Due to smaller size and high nuclear charge B has very high ionization energy value so does not show +3 oxidation state.
Further according to Fajan's rule, cation with small size and high positive charge leads to covalent bond.
