General Science - Online Test
Q1. Self-ionization of water is called
Answer : Option A
Explaination / Solution:
In auto-protolysis a proton is transferred between two identical molecules, one of which acts as a Bronsted acid, releasing a proton which is accepted by the other molecule acting as a Bronsted base.
Auto-protolysis is also called the self-ionization. Auto-protolysis of water is a reaction in which self-ionization of water molecules takes place to produce hydronium ion (H3O+) and hydroxide ion (OH-).
Q2. Purity of seed is guaranteed by
Answer : Option D
Explaination / Solution:
National Seed Corporation is responsible for maintaining purity of seeds of crop plants. This organization checks the purity of gene from pathogens as well as harmful effect of the contents present in it.
Q3. A bar magnet of magnetic moment 1.5 J/T lies perpendicular to the direction of a uniform magnetic field of 0.22 T. What is the torque acting on it?
Answer : Option D
Explaination / Solution:
No Explaination.
Q4. The refractive index of glass is 1.5. What is the speed of light in glass? (Speed of light in vacuum is 3.0)
Answer : Option D
Explaination / Solution:
No Explaination.
Q5. Species are classified within a hierarchy reflecting:
Answer : Option D
Explaination / Solution:
Classification of organisms are done on the basis of evolutionary hierarchy that is older organisms are classified first and recently evolved species later on.
Q6. According to Werner’s theory, the secondary valences of the central atom correspond to its
Answer : Option D
Explaination / Solution:
According to Werner’s theory CN is equal to secondary valency.
Q7. Girls blind from birth attain puberty earlier than normal due to :
Answer : Option D
Explaination / Solution:
Pineal gland releases Melatonin (a hormone) which is responsible for inhibiting Lutinising hormone and Folicle Stimulating Hormone that bring about puberty. Melatonin is secreated more in absence of light. In normal humans it is more released at night when it is released more. In blind girls, light is absorbed more at day whose effect continues at night. Hence, Melatonin is secreted less and LH and FSH are not inhibited more and puberty is experienced early.
Q8. What is the main excretory organ in insects?
Answer : Option B
Explaination / Solution:
The insects belong to phylum Arthropoda and hence, the excretory organ is Malphighian tubules.
Q9. One of the various quantitative instruments used by the central bank in during inflation is
Answer : Option B
Explaination / Solution:
No Explaination.
Q10. In an N-P-N transistor, P-type crystal is
Answer : Option A
Explaination / Solution:
When the p-type crystal is grown between relatively wide sections of n-type crystals then the transistor is called NPN transistor.
