General Science - Online Test
Q1. In a market economy, the central problems are solved by
Answer : Option D
Explaination / Solution:
To solve the problems through market or price mechanism ie., what goods are to be produced and what quantities, which methods for production are to be employed for the production of goods and how the output is to be distributed, should be decided by the free play of the forces of demand and supply.
Q2. Which one is not a reason of mineral depletion in the soil?
Answer : Option D
Explaination / Solution:
Mineral deficiency in soil may be due to use of high yielding varieties, non-rotation of crops and leeching of minerals. Growing leguminous plants do not deplete the mineral in soil.
Q3. The arrows represent :[upward to downward]
Answer : Option C
Explaination / Solution:
The figure shows the muscular sac called the gall bladder. The duct of gall bladder (cystic duct) along with the hepatic duct from the liver forms the common bile duct.
Q4. The bluish color predominates in a clear sky,
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. The primary and secondary immune response are carried out with the help of two special types of lymphocytes present in our blood called
Answer : Option A
Explaination / Solution:
T cells (thymus cells) and B cells (bone marrow- or bursa-derived cells) are the major cellular components of the adaptive immune response. T cells are involved in cell-mediated immunity, whereas B cells are primarily responsible for humoral immunity (relating to antibodies).
Q6. spin quantum number with two spin states of the electron represented by two arrows, ↑ (spin up) and ↓ (spin down) was introduced to account for
Answer : Option C
Explaination / Solution:
In 1920, Otto Stern and Walter Gerlach designed an experiment, which unintentionally led to the discovery that electrons have their own individual, continuous spin even as they move along their orbital of an atom. The experiment mentioned above by Otto Stern and Walter Gerlach was done with silver which was put in an oven and vaporized. The result was that silver atoms formed a beam that passed through a magnetic field in which it split in two.
Q7. A light bulb is rated at 50W for a 220 V supply. The resistance of the bulb, the peak voltage of the source and the rms current through the bulb are
Answer : Option B
Explaination / Solution:
Peak value of voltage
rms value of current
Q8. Taj Mahal is threatened due to;
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. A region on retina of human eye which is free from rods and cones is :
Answer : Option A
Explaination / Solution:
The optic nerves leave the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eye ball. Photoreceptor cells are not present in that region and hence it is called the blind spot.
Q10. The law of supply explains a
Answer : Option C
Explaination / Solution:
No Explaination.
