General Science - Online Test
Q1. The method of generalizing data collected from a few units out of the entire population is called _____.
Answer : Option A
Explaination / Solution:
The data is collected from a handfull of population and the conclusion is generalized to the whole population. Concluding the quality of rice by checking only few grains of it, is a daily life example of sampling method.
Q2. ________ resources are those which get exhausted with extraction
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. DNA is made of two chains that twist about one another in the shape of a
Answer : Option C
Explaination / Solution:
Double helix is the description of the structure of a DNA molecule. A DNA molecule consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating groups of sugar (deoxyribose) and phosphate groups.
Q4. In a potentiometer experiment, for measuring internal resistance of a cell, the balance point has been obtained on the fourth wire. The balance point can be shifted to fifth wire by
Answer : Option B
Explaination / Solution:
If the current due to the auxillary battery is decreased, the potential gradient will be decreases, so the balancing length increases.
Thus null point will move to fifth wire.
Q5. Frequency of the periodic motion is
Answer : Option C
Explaination / Solution:
Frequency is defined as number of oscillation completed by an oscillating body in unit time i.e. in one second during oscillatory motion.
Q6. Term ecosystem was introduced by :
Answer : Option A
Explaination / Solution:
The term "ecosystem" was first used in 1935 in a publication by British ecologist Arthur Tansley.
Tansley devised the concept to draw attention to the importance of transfers of materials between organisms and their environment.
Ecosystem is the functional unit of nature where living and non-living components interact with each other.
Q7. A ray is an imaginary
Answer : Option D
Explaination / Solution:
No Explaination.
Q8. The coordination number of Cr in [Cr(NH3)3(H2O)3]Cl3 is
Answer : Option D
Explaination / Solution:
Coordination number of the central ion is equal to no. of coordination bonds formed with surrounding ions.
Q9. The three isotopes of hydrogen in terms of chemical properties show one of the following properties
Answer : Option D
Explaination / Solution:
Isotopes difference in their rate of reaction.
Q10. Picking up plants with superior phenotype for further propagation is
Answer : Option A
Explaination / Solution:
Mass selection is a simplest , common and oldest method of crop improvement, in which large number of plants of similar superior phenotype are selected and their seeds are harvested and mixed together to constitute the new variety.
