General Science - Online Test
Q1. Homeostasis in the body is largely maintained by :
Answer : Option A
Explaination / Solution:
Homeostasis is the maintenance of constant body temperature. It is mainly maintained by excretion and osmoregulation, which is the function of kidney.
Q2. the rates of transfer of molecules from ice into water and of reverse transfer from water into ice are equal at atmospheric pressure and 273 K. Both the processes occur simultaneously and at the same rate so that the amount of ice and water remains constant. This process is called
Answer : Option C
Explaination / Solution:
Ice and water kept in a perfectly insulated thermos flask at 273K and the atmospheric pressure are in equilibrium state and the system shows interesting characteristic features. The mass of ice and water do not change with time and the temperature remains constant. However, the equilibrium is not static. The intense activity can be noticed at the boundary between ice and water. Molecules from the liquid water collide against ice and adhere to it and some molecules of ice escape into liquid phase. There is no change of mass of ice and water, as the rates of transfer of molecules from ice into water and of reverse transfer from water into ice are equal at atmosphere pressure and 273K.
Q3. According to abiogenesis life originates from
Answer : Option A
Explaination / Solution:
According to abiogenesis theory of origin of life, life originated from non-living matter like gases, inorganic substance and water at particular temperature and pressure.
Q4. dipole-dipole forces act between molecules that have
Answer : Option B
Explaination / Solution:
dipole dipole forces act between molecules that have a permanent electrical dipole moment,the partial charge of one molecule get attracted to the opposite charge of other molecule
Q5. The following amine can be classified as
Answer : Option C
Explaination / Solution:
This is primary amine, because the Nitrogen of amine is only connected to one carbon.
Q6. Sclerids belongs to
Answer : Option D
Explaination / Solution:
Scleroids belongs to sclerenchyma complex permanent tissue presentin hard parts of plants. They are generally hard and founds in rough fruits and stem.
Q7. The undifferentiated mass of parenchymatous cells are called
Answer : Option A
Explaination / Solution:
Plant callus is a growing mass of unorganized plant parenchyma cells. In living plants, callus cells are those cells that cover a plant wound.
Q8. In Geiger-Marsden experiment very small deflection of the beam was expected because
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. The expansion of ICZN is
Answer : Option D
Explaination / Solution:
Animal taxonomists have evolved International Code of Zoological Nomenclature (ICZN). Hence, the correct option is International code of zoological nomenclature.
Q10. in cycloalkanes carbon atoms form
Answer : Option D
Explaination / Solution:
Cycloalkanes contain single bond between the carbon atoms,they form ring structures and have the general formula CnH2n
