General Science - Online Test
Q1. Suppose a researcher is concerned with a nominal scale that identifies users versus nonusers of bank credit cards. The measure of central tendency appropriate to this scale is the
Answer : Option C
Explaination / Solution:
Here, Mode is the most appropriate measure. Mode is the most frequently observed data value.
Q2. A situation in which there is an overall acceleration in the growth rate of GDP in the economy which is not accompanied by a commensurate expansion in employment opportunities
Answer : Option A
Explaination / Solution:
An economy that is experiencing growth without an expansion of jobs challenges investors, employees and industries to adapt to the new economic order.
Q3. Figure shows the position-time graph of a particle of mass 4 kg. What is the force on the particle for ?
Answer : Option C
Explaination / Solution:
When t < 0. As this part is horizontal, thus it can be concluded that distance covered by the particle is zero and hence force on the particle is zero.
When 0 < t < 4 s. As OA has a constant slope, hence in this interval, particle moves with constant velocity (acceleration = 0). Hence force on the particle is zero.
W'hen t > 4s. As this portion shows that particle always remains at a distance of 3 m from the origin i.e., the particle is at rest. Hence force on the particle is zero.
Q4. If 2% of the main current is to be passed through the galvanometer of resistance G, the resistance of shunt required is
Answer : Option C
Explaination / Solution:
The current Ig through a galvanometer of resistance G is 0.02 I where I is the main current.
The shunt resistance S is calculated as follows.
Q5.
During vigorous exercise :
i. lactic acid accumulates in muscle cells to meet its energy needs immediately.
ii. lactic acid is formed by anaerobic respiration hence oxygen consumption by muscles is reduced.
iii. This reduction in oxygen consumption is called oxygen debt of muscle.
Answer : Option D
Explaination / Solution:
During vigorous exercise, lactic acid accumulates in muscles cells to meet the energy requirement of muscle cell. Lactic acid is formed due to insufficient availability of oxygen.
Q6. Gene transfer in biotechnology can be done by
Answer : Option C
Explaination / Solution:
Gene transfer in biotechnology can be done by number of methods. Microinjection is the use of a glass micropipette to inject a liquid substance at a microscopic or borderline macroscopic level. The target is often a living cell but may also include intercellular space.
Microinjection is one of the best methods to transfer desired gene into suitable host.
Q7. The oxidizing power of halogens increase in the order of
Answer : Option C
Explaination / Solution:
Halogens have high electronegativity and electron affinity. They have greater tendency to accept electrons or easily reduced, therefore they are strong oxidizing agent.
As the reduction potential decrease down the group,the oxidizing power decrease down the group the order of the oxidizing power will be as under
F2 > Cl2> Br2> I2
¥ The oxidizing power depends on,
Heat of dissociation of halogen molecule.
Electron affinity of atom.
Hydration energy of the ion.
Heat of vaporization
If a halogen has low energy of dissociation, a high electron affinity, and higher hydration of its ion, it will have high oxidizing power.
F has although low electron affinity than Cl but low dissociation energy and have high hydration energy of its ion, therefore Fluorine is strongest oxidizing agent.
Q8. Which of the following is mechanical barrier used for birth control
Answer : Option C
Explaination / Solution:
Diaphragm is mechanical barrier used for birth control. It is made up of rubber and prevents meeting of sperm and ovum.
Q9. Probability of backward scattering (i.e., scattering of α -particles at angles greater than ) predicted by Thomson’s model is
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. water in a tank is a
Answer : Option D
Explaination / Solution:
No Explaination.
