General Science - Online Test
Q1. Heterozygous tall plants were crossed with dwarf plants what will be the ratio of dwarf plants in the following progeny?
Answer : Option B
Explaination / Solution:
Heterozygous tall plant (Tt) is crossed with homozygous dwarf (tt) the percentage of dwarf plants is 50 percent.
Q2. Which one is not a preparatory phase or energy spending phase of Glycoloysis
Answer : Option B
Explaination / Solution:
Formation of pyruvate is not a prerparatory phase or energy spending phase of Glycolysis. In this phase one ATP molecule is released.
Q3. Which of the following is correctly matched?
Answer : Option B
Explaination / Solution:
The T-wave represents the return of the ventricles from excited to normal state.
Q4. High value of BOD shows
Answer : Option A
Explaination / Solution:
Biological oxygen demand is the amount of oxygen required to completely decompose the organic waste present in one liter of water by bacteria. High value of BOD shows that water is highly polluted.
Q5. In the formation of hydrogen molecule, overlapping of atomic orbitals which results in the pairing of electrons. These are:
Answer : Option A
Explaination / Solution:
overlapping of atomic orbitals having electrons of opposite spin take palce in the formation of molecule.
Q6. The self-inductance of a long solenoid, the core of which consists of a magnetic material of permeability μr,turns per unit length n,length l and area A is given by
Answer : Option A
Explaination / Solution:
N = total no. of turns
if n = no. of turns per unit length then
N = nl
Q7. A photon is
Answer : Option C
Explaination / Solution:
Photon is the small packet of light energy. The photon has zero rest mass and moves with the speed of light.
Q8. If DDT content in the water of a lake is found to be 0.004 ppm then pelicans of that area will have:
Answer : Option A
Explaination / Solution:
DDT is used as pesticide in crop fields and to kill mosquito in open drains. DDT is not a biodegradable and reaches to nearby water bodies. DDT enters the food chain through aquatic organisms and get magnified at each trophic levels. Pelicans beings at higher trophic levels may contain upto 2 ppm DDT.
Q9. 
In the reaction Pent – 2 – ene. 2 – Bromopentane. Pent – 1 – ene 2 – Bromopentane on heating with alcoholic KOH, forms two compounds: Pent – 1 – ene and Pent – 2 – ene. Which one of the following statements is true
In the reaction Pent – 2 – ene. 2 – Bromopentane. Pent – 1 – ene 2 – Bromopentane on heating with alcoholic KOH, forms two compounds: Pent – 1 – ene and Pent – 2 – ene. Which one of the following statements is true
Answer : Option D
Explaination / Solution:
Pent-2-ene is major product as ore substituted alkene is formed in major quantity according to zaitsev rule.
Q10. What is the correct order of decreasing stability of the following cations.
Answer : Option B
Explaination / Solution:
II is very stable because +ve charge is dispersed by +R effect of
