General Science - Online Test
Q1. Example of misuse of environmental resource
Answer : Option B
Explaination / Solution:
No Explaination.
Q2. Enzymes called ______ add complementary nucleotides, floating inside the nucleus.
Answer : Option B
Explaination / Solution:
The DNA polymerases are enzymes that create DNA molecules by assembling nucleotides, the building blocks of DNA. These enzymes are essential to DNA replication and usually work in pairs to create two identical DNA strands from one original DNA molecule. It is found floating freely inside the nucleus.
Q3. Domestic power supply in India is
Answer : Option B
Explaination / Solution:
India use ac power supply of frequency 50 Hz and voltage 230V while America uses ac supply of frequency 60Hz and voltage 110V.
Q4. The period of a simple pendulum is doubled when
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. Hydrogenation of vegetable oil using nickel as catalyst gives edible fats. Choose the appropriate one given below.
Answer : Option A
Explaination / Solution:
Vanaspati ghee is manufactured from vegetable or seed oil by a process called 'hydrogenation'.
Vegetable Oil is a viscous liquid, and contains unsaturated fatty acids, upon hydrogenation it is are converted to saturated fatty acids to form vanaspati ghee which is solid/semi solid in nature.
For quick and easy hydrogenation, catalyst like Ni, Pt which are capable of adsorbing hydrogen are used.
Q6. The dividing and undifferentiated cells are known as
Answer : Option C
Explaination / Solution:
The differentiated mass of cells is called callus. During tissue culture, callus is formed when small part of plant is kept in nutrient medium. Callus cells divide rapidly.
Q7. A closely wound solenoid of 800 turns and area of cross section carries a current of 3.0 A.It is free to turn about the vertical direction and a uniform horizontal magnetic field of 0.25 T is applied.Magnitude of torque on the solenoid when its axis makes an angle of with the direction of applied field
Answer : Option A
Explaination / Solution:
No Explaination.
Q8. Shape of the wave front of light diverging from a point source is
Answer : Option B
Explaination / Solution:
When light diverges from a point source it moves in the form of diverging spherical wavefront.
Q9. As per research reports, due to unchecked human activities our Earth is at present heading towards
Answer : Option B
Explaination / Solution:
An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth.
Due to unchecked human activities, biologists suspect we’re living through the sixth major mass extinction. Earth has witnessed five, when more than 75% of species disappeared.
Glogal warming, greenhouse effect, deforestation, pollution of atmosphere, water and soil all contributing destruction of earth.
Q10. What is used as the complexing agent in volumetric analysis of ions like [Mg2+ and Ca2+
Answer : Option B
Explaination / Solution:
EDTA is hexadentate ligand so it forms stable chelate complex with metal ions.
