General Science - Online Test
Q1.
According to the dipole analogy corresponds to
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. In a wetland the primary factor controlling the environment and the associated plant and animal life will be
Answer : Option A
Explaination / Solution:
The area that is saturated with water is called wetland. In wetland the primary factor controlling the environment and the associated plant and animal life will be water.
Q3. The reversible work done by a galvanic cell is equal to decrease in its Gibbs energy and therefore, if the emf of the cell is E and nF is the amount of charge passed and ΔrG is the Gibbs energy of the reaction, then
Answer : Option B
Explaination / Solution:
Q4. To find the resultant gravitational force acting on the particle m due to a number of masses we need to use:
Answer : Option C
Explaination / Solution:
According to properties of gravitational force, gravitational force between the particles is independent of the presence or absence of other particles; so the principle of superposition is valid i.e. force on a particle due to number of particles is the resultant of forces due to individual particles i.e.
Q5. In n-type semiconductor the fifth electron
Answer : Option B
Explaination / Solution:
When we add a small quantity of impurity in a semiconductor than the impurity contributes either free electrons or holes to the semiconductor. As a result, the conducting property of semiconductor changes. The process of changing the conductive property of semiconductor by adding impurities is known as doping.
Suppose, in any pure or intrinsic germanium or silicon semiconductor any pentavalent impurity is added. The pentavalent impurities are those which have atoms with five (5) valence electrons. As soon as we add the impurity to the semiconductor, the impurity atoms will replace some of the semiconductor atoms in the crystal structure.
Now four (4) of the five (5) valance electrons of impurity atom will involve in bonding with four neighborhood semiconductor atoms, but the fifth one electron will not find any place to occupy.
This fifth electron of the impurity atom can be made available as free electron or negative charge carrier even if a very small amount of energy is applied.
Q6. The elasticity at a point on a straight line supply curve passing through the origin will be
Answer : Option D
Explaination / Solution:
No Explaination.
Q7. Pick the animals with true placenta
Answer : Option C
Explaination / Solution:
True placenta is present in Mongoose. Placenta help in transfer of nutrients and respiratory gases from mother to growing foetus.
Q8. One drawback of barter exchange is
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. Flower is a modified shoot because
Answer : Option D
Explaination / Solution:
Flower is a modified shoot because it develops in the axils of bracts like axillary shoots. New buds also develop at node inside the axils of bracts of leaves.
Q10. _____ in which current year quantities are used
Answer : Option B
Explaination / Solution:
Passche's Price Index is calculated by taking current year quantities as base therfore it is also called current year quantity weight method.
