Answer : Option BExplaination / Solution:
In thermodynamics, an adiabatic wall between two thermodynamic systems does not allow heat or matter to pass across it. In theoretical investigations, it is sometimes assumed that one of the two systems is the surroundings of the other.
Answer : Option AExplaination / Solution:
External force permanently distubed the equilibrium position of the interatomic ( or intermolecular ) forces between the particles of solid bodies.
Q5.Brief exposure of cells to an electric field also allow the bacteria to take up DNA and this process is called as
Answer : Option BExplaination / Solution:
Electroporation, or electropermeabilization, is a microbiology technique in which an electrical field is applied to cells in order to increase the permeability of the cell membrane, allowing chemicals, drugs, or DNA to be introduced into the cell.
Answer : Option DExplaination / Solution:
Urinary bladder is absent in snake and bird because the urine of these is semi-solid consisting mainly of uric acid. The primary function of urinary bladder is to store urine in mammals. The urinary bladder cannot store semi-solid urine.
Q7.H2O(l)⇌H2O (vap). This equation best illustrates the
Answer : Option DExplaination / Solution:
The number of water molecules from the gaseous state into the liquid state also increases till the equilibrium is attained i.e., rate of evaporation = rate of condensation
At equilibrium the pressure exerted by the water molecules at a given temperature remains constant and is called the equilibrium.
Answer : Option BExplaination / Solution:
Fossils are dead remains of plants and animals buried inside the earth crust millions of year ago. Fossils are commonly preserved in sedimentary rock as this kinds of rocks are formed layer by layer in course of time.
Q9.Which of the following statements about Hydrogen bond incorrect?
Answer : Option CExplaination / Solution:
Hydrogen atom covalently bonded to highly electronegative atom such as N,O experience electrostatic field of another highly electronegative atom due to which a partial positive charge is developed on H atom.