General Science - Online Test
Q1. Those people who are hired by others and are paid wages as a reward for their services are called
Answer : Option A
Explaination / Solution:
Labour hire is the term applied (especially in Australia) to provision of outsourced skilled and unskilled blue collar workers hired for short- or long-term positions. It is known by other names such as supplementary staffing, labour supply or temping.The workers, known as contractors, field employees, temps, on-hired employees or even just employees, are employed by the labour hire organisation. They are not employed by the company to whom they provide labour. This is an important distinction for the purposes of Occupational Healthy and Safety purposes, in particular who has legislative responsibility for ensuring a safe working environment.
Q2. Two bodies of masses 10 kg and 20 kg respectively kept on a smooth, horizontal surface are tied to the ends of a light string. a horizontal force F = 600 N is applied to the 10 kg mass so as to pull it. What is the tension in the string?
Answer : Option C
Explaination / Solution:
Let, T= tension on the string
a = acceleration, m1 = mass of light body= 10 kg and m2= mass of heavy body = 20 kg
Now the tension in the string will be,
Q3. alpha endotoxins are formed by
Answer : Option B
Explaination / Solution:
Alpha endotoxins are formed by sporulation. Alpha endotoxins are known to be frequent contaminants in plasmid DNA extracted from bacteria.
Q4. Drift is the random motion of the charged particles within a conductor,
Answer : Option A
Explaination / Solution:
The electrons in a conductor have random velocities and when an electric field is applied, they suffer repeated collisions and in the process move with a small average velocity, opposite to the direction of the field. This is equivalent to positive charge flowing in the direction of the field.
Q5. Lactational amenorrhea method of natural contraception is effective up to
Answer : Option C
Explaination / Solution:
Lactational amenorrhea means absence of menstrual cycle during instance lactational period after the parturition. This method is reported to be useful up to six months of parturition.
Q6. An alpha particle (charge 2e) is aimed directly at a gold nucleus (charge 79e). What minimum initial kinetic energy must the alpha particle have to approach within 5.0 * 10-14 m of the center of the gold nucleus before reversing direction? Assume that the gold nucleus, which has about 50 times the mass of an alpha particle, remains at rest.
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. water in a stream is a
Answer : Option C
Explaination / Solution:
No Explaination.
Q8. Anisole reacts with a mixture of concentrated sulphuric and nitric acids to yield a mixture of ortho and para nitroanisole
Answer : Option C
Explaination / Solution:
Para isomer is major because ethere is no steric hinderance and also at para +M effect will work effectively.
Q9. If the potential difference between the plates of a capacitor is increased by 0.1%, the energy stored in the capacitor increases by very nearly
Answer : Option C
Explaination / Solution:
The initial energy stored in the capacitor at potential difference V is When the p.d is increased by ,the energy stored is Solving,
Q10. Chemistry does not play a major role in
Answer : Option A
Explaination / Solution:
Chemistry does not deal in explaining superconductivity.
*In superconducting materials the charecteristics of superconductivity appear when the temperature is lowered below a critical temperature.
*The onset of superconductivity is accompanied by abrupt changes in physical properties which are more related to phase transitions of the material .
These aspects of studies in properties of materials are better related to studies in the fields of Physics , eventhough principles involved in Chemistry & Physics go hand to hand.
