General Science - Online Test
Q1. The problem of ozone depletion is caused in the stratosphere by high levels of compounds
Answer : Option C
Explaination / Solution:
The problem of ozone depletion is caused by high levels of chlorine and bromine compounds in the stratosphere.The origins of these compounds are chlorofluorocarbons (CFC), used as cooling substances in airconditioners and refrigerators, or as aerosol propellants, and bromofluorocarbons (halons), used in fire extinguishers.
Q2. DNA has equal number of adenine and thymine residues (A = T) and equal number of guanine and cytosine (G = C). These relationships are known as
Answer : Option A
Explaination / Solution:
Chargaff's rules states that DNA from any cell of all organisms should have a 1:1 ratio (base Pair Rule) of pyrimidine and purine bases and, more specifically, that the amount of guanine is equal to cytosine and the amount of adenine is equal to thymine.
Q3. The figure shows an unbalanced Wheatstone bridge. To balance the bridge:
Answer : Option B
Explaination / Solution:
To balance bridge
So X = 90
Q4. Damping is due to
Answer : Option B
Explaination / Solution:
Damping is proportional to the velocity of the mass through the medium , so it can be said that air drag ,friction offers damping.
Q5. Breakdown of detritus by microbial enzymes into simple forms is called
Answer : Option D
Explaination / Solution:
Catabolism is the metabolic process due to which mass of the organism reduces. Detritus release microbial enzymes that breakdown the dead or decaying organisms into simpler form.
Q6.
If we have two coherent sources vibrating in phase with same amplitude, then for an arbitrary point P with path difference corresponding to , the resultant intensity if the intensity due to each is I0 would be
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. The ionic hydrides are crystalline, non-volatile but on melting does one of the following:
Answer : Option C
Explaination / Solution:
They are formed when hydrogen molecule reacts with most s-block elements which are highly electropositive in nature. In solid state, the ionic hydrides are crystalline, non-conducting and non-volatile.
However, in liquid state it conducts electricity. Ionic hydrides on electrolysis liberate hydrogen gas at the anode.
Q8. Soma clones are obtained by
Answer : Option B
Explaination / Solution:
Genetic engineering is the technique of manipulating the genome of an organism.
The plants produced through genetic engineering technique that are genetically identical to the original plant from which they are produced are called soma clones.
Q9.
if =magnetic intensity, =susceptibility, magnetic moment per unit volume equals
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. In which of the following compounds, the metal is in the lowest oxidation state?
Answer : Option A
Explaination / Solution:
CO is neutral so Mn has zero oxidation state.
