General Science - Online Test
Q1. Smooth curve joining the points corresponding to the frequency and provides frequency curve of the data
Answer : Option A
Explaination / Solution:
The frequency curve is obtained by drawing a smooth freehand curve passing through the points of the frequency polygon as closely as possible. It may not necessarily pass through all the points of the frequency polygon but it passes through them as closely as possible.
Q2. Organic farming is preferred because it
Answer : Option C
Explaination / Solution:
Organic farming is a system of farming that relies upon the use of organic inputs for cultivation.
Q3. A cricketer can throw a ball to a maximum horizontal distance of 100 m. How much high above the ground can the cricketer throw the same ball?
Answer : Option D
Explaination / Solution:
Maximum horizontal distance, R = 100 m
The cricketer will only be able to throw the ball to the maximum horizontal distance when the angle of projection is 45°, i.e., θ = 45°.
The horizontal range for a projection velocity v, is given by the relation:
R =( u2 Sin 2θ / g)
100 =
=> = 100 ….(i)
The ball will achieve the maximum height when it is thrown vertically upward. For such motion, the final velocity v is zero at the maximum height H.
Acceleration, a = –g
Using the third equation of motion:
v2 – u2 = -2gH
The cricketer will only be able to throw the ball to the maximum horizontal distance when the angle of projection is 45°, i.e., θ = 45°.
The horizontal range for a projection velocity v, is given by the relation:
R =( u2 Sin 2θ / g)
100 =
=> = 100 ….(i)
The ball will achieve the maximum height when it is thrown vertically upward. For such motion, the final velocity v is zero at the maximum height H.
Acceleration, a = –g
Using the third equation of motion:
v2 – u2 = -2gH
Q4. Which currency is universally accepted
Answer : Option B
Explaination / Solution:
First and foremost is the U.S. dollar, which is easily the most traded currency on the planet. The USD can be found in a pair with all the other major currencies and often acts as the intermediary in triangular currency transactions.
Q5. Chromosome appeared beaded during
Answer : Option A
Explaination / Solution:
Chromosome appeared beaded during leptotene stage of prophase of meiosis I due to the distinct appearance of nucleosomes. Chromatin materials start condensing after that stage.
Q6. Which is correct in case of Vander waals adsorption?
Answer : Option B
Explaination / Solution:
Physiadsorption is favoured only at low temperature and high pressure.
Q7. A tennis ball which has been covered with charges is suspended by a thread so that it hangs between two metal plates. One plate is earthed, while other is attracted to a high voltage generator. The ball
Answer : Option C
Explaination / Solution:
The plate which connected to high voltage generator induces negative charge on ball which causes attraction. When the ball strikes the positive plate, charge distribution again takes place that is the bass becomes positive and repulsion takes place. When it strikes the plate which connected to earth than its charge goes to earth and again it will be attracted towards positive plate. Hence the ball swings backward and forward hitting each plate in turn.
Q8. A steel rod 2.0 m long has a cross-sectional area of 0.30 . It is hung by one end from a support, and a 550-kg milling machine is hung from its other end. Determine the elongation. Take Young's modulus of steel as 20 Pa
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. During agarose gel electrophoresis DNA fragments moves towards anode. This is because
Answer : Option B
Explaination / Solution:
To separate DNA using agarose gel electrophoresis, the DNA is loaded into pre-cast wells in the gel and a current applied. The phosphate backbone of the DNA (and RNA) molecule is negatively charged, therefore when placed in an electric field, DNA fragments will migrate to the positively charged anode.
Q10. In the following pictorial representation of Kreb’s Hensleit cycle, find out 1,2& 3 ?
Answer : Option B
Explaination / Solution:
Kreb’s Hensleit cycle is the sequence of chemical reaction occurring primarily in the liver that results in the production of urea. In this cycle ammonia is fist converted into citrulline along with carbon dioxide that change into arginine and finally into ornithine.
