General Science - Online Test
Q1. How many atoms of helium gas fill a balloon of diameter 30.0 cm at 20.0C and 1.00 atm?
Answer : Option D
Explaination / Solution:
PV=NkTN=PVkT=1.01×105×(43×3.14×(0.15)3)1.38×10−23×293=3.53×1023
Q2. The number of births in polygamous population is often directly related to
Answer : Option B
Explaination / Solution:
Polygamous population is often directly related to number of females in the population. Polygamy means having more than one female partner with single male that can reproduce.2
Q3. Natural rubber is
Answer : Option D
Explaination / Solution:
Natural Rubber is polyisoprene.
Q4. Sulphur is important nutrient for optimum growth and productivity of
Answer : Option A
Explaination / Solution:
Sulphur is an important nutrient for optimum growth and productivity of pulse crops, because sulphur is important in protein synthesis of plants.
Q5.
Trans fats :
i. they are found in most processed and fast foods for eg. French fries.
ii. they help food stay fresh for long time.
iii. they are much better type of fat than the saturated fats.
Answer : Option A
Explaination / Solution:
Trans fats are hydrogenated fats which makes the oil more solid. They are found in most processed and fast foods. They help food stay fresh for long time.
Q6. A convex crown glass lens ( = 1.5 ) has a focal length of 8 cm when placed in air. What is the focal length of the lens when it is immersed in water w
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. Choose one of the following in the increasing order of electron gain enthalpy
Answer : Option C
Explaination / Solution:
In general as the we move down the group electron gain enthalpy decreases; so the expected trend should be I < Br < Cl < F but in actual the order is I < Br < F < Cl . This is due to small size of F atom. The valence electrons of F atom provide strong repulsion to incoming electron, hence F has unexpectedly low electron affinity.
Q8. Which of the following factor do not motivate youngsters towards drug and alcohol use?
Answer : Option D
Explaination / Solution:
Curiosity, need for adventure and excitement and experimentation constitute common causes, which motivate youngsters towards drug and alcohol use.
Q9. The branch of economics dealing with the problem of allocation of resources is
Answer : Option B
Explaination / Solution:
Microeconomics is the social science that studies the implications of individual human action, specifically about how those decisions affect the utilization and distribution of scarce resources. Microeconomics shows how and why different goods have different values, how individuals make more efficient or more productive decisions, and how individuals best coordinate and cooperate with one another.
Q10. Read the following :
i. In human iris, contraction of sphincter muscles widens the pupil in dim light to let in more light.
ii. The amount of pigment in the ciliary body of eye provides eye with its characteristic colour.
i. In human iris, contraction of sphincter muscles widens the pupil in dim light to let in more light.
ii. The amount of pigment in the ciliary body of eye provides eye with its characteristic colour.
Answer : Option C
Explaination / Solution:
Human eyes contain iris that is responsible for changing size of pupil to allow or preventthe amount of light entering the eyeball. Cons cells present in retina are responsible for colour perception.
