General Science - Online Test
Q1. Estimate the average thermal energy of a helium atom at room temperature (27 C)
Answer : Option D
Explaination / Solution:
k = boltzman constant
Q2. The term Darwinian fitness among populations living together signifies
Answer : Option A
Explaination / Solution:
The term Darwinian fitness among populations living together signifies the reproductive fitness of organisms population. Those species that can reproduce in between are called reproductive fitness.
Q3. Function of laghaemoglobin during biological nitrogen fixation in root nodules of legumes is to
Answer : Option A
Explaination / Solution:
During biological nitrogen fixation in root nodules of legumes, laghaemoglobin provide protection to the nitrogenase from Oxygen.
Q4. Correct sequence of layers in gut wall from inside to outside is :
Answer : Option B
Explaination / Solution:
Serosa is the outermost layer while mucosa is the innermost layer. The layer next to mucosa is the sub-mucosa containing nerves, blood and lymph vessels. Muscularisis found between sub-mucosa and serosa.
Q5. Which central problem explains ‘who gets more and who gets less’?
Answer : Option D
Explaination / Solution:
This problem refers to selection of the category of people who will ultimately consume the goods, i.e. whether to produce goods for more poor and less rich or more rich and less poor. Since resources are scarce in every economy, no society can satisfy all the wants of its people. Thus, a problem of choice arises.
Q6. An equi-convex thin lens (μ =1.5) of focal length in air as 30cm is sealed into an opening in one end of tank filled with water ((μ =1.33). At the end of the tank opposite the lens is a plane mirror, 80 cm distant from the lens. The position of the image formed by the lens-water-mirror system of a small object outside the tank on the lens axis and 90cm to the left of the lens will be
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. A metastatic cancerous tissue is termed ‘sarcoma’ if the disorder is in
Answer : Option B
Explaination / Solution:
A metastatic cancerous tissue is called sarcoma if the disorder is in fibroblast. The property of cancerous cells to reach from one part of the body to other through blood is called metastasis.
Q8. World environment day is celebrated every year on-
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. Daltons atomic theory could not explain one of the following
Answer : Option C
Explaination / Solution:
Daltons theory said atom is indivisible in nature so it doesnot explain the existence of subatomic particles.
The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes part in chemical reactions.
Q10.
Among photoreceptors cones are responsible for bright light vision and they also :
i. give colour vision because they contain 3 different pigments.
ii. pigments are sensitive to red,green and yellow lights.
iii. pigments are sensitive to red,green and blue lights.
iv. individual cone cell contains all the three pigments in it.
Answer : Option D
Explaination / Solution:
In the human eye, there are three types of cones which possess their own characteristic photopigments that respond to red, green and blue lights. The sensations of different coloursare produced by various combinations of these cones and their photopigments.
