Statement I : Balloons made by nylon films are better for containing helium than the conventional rubber balloons.
Statement II : R.M.S. velocity of helium is very high. So helium atom can effuse out through rubber balloons.

In the following questions, each question contains Statement I(assertion) and StatementII(reason). Each questions has four choices a, b, c, and d out of which only one is correct. Statement I: A block of mass m starts moving on a rough horizontal surface with a velocity v. It stops due to friction between the block and the surface after moving through a certain distance. The surface is now titled to an angle of 30^@ with the horizontal and the same block is made to go up on the surface with the same initial velocity v. The decrease in mechanical energy in the second situation is smaller than that in the first situation. Statement II: The coefficient of friction between the block and the surface decreases with the increase in the angel of inclination.

State the Following statement as statements as TRUE and FALSE. a. The redius of nth Bohr is proporitional to n^(2) . b. The total energy of electron in the nth orbit is inversely proporitional to n^(2) . c. The time period revolution of electron in the nth orbit is directly proporitional to n^(2) . d. The kinetic energy of electron is double of its potential energy with a negative sign. e. Velocity of electron in an atom is independent of its mass. f. Only balmer series of hydrogen atom lines in the visible range. g. The angular momentum of an electron revolving in the first orbit of hydrogen is equal to that in first orbit of helium. h. The binding energy of decuterium atom is more than that of hydrogen atom. i Lyman series of hydrogen atom lines in the infrared region.

State the Following statement as statements as TRUE and FALSE. a. The redius of nth Bohr is proporitional to n^(2) . b. The total energy of electron in the nth orbit is inversely proporitional to n^(2) . c. The time period revolution of electron in the nth orbit is directly proporitional to n^(2) . d. The kinetic energy of electron is double of its potential energy with a negative sign. e. Velocity of electron in an atom is independent of its mass. f. Only balmer series of hydrogen atom lines in the visible range. g. The angular momentum of an electron revolving in the first orbit of hydrogen is equal to that in first orbit of helium. h. The binding energy of decuterium atom is more than that of hydrogen atom. i Lyman series of hydrogen atom lines in the infrared region.

In a given statement followed by three assumptions numbered I, II and III. An assumption is something supposed or taken for granted. You have to consider the statement and the following assumptions and decide which of the assumptions is implicit in the statement. Then decide which of the answers (1), (2), (3),(4) and (s) is the correct answer. Statement : "If we really want to reduce the menace of smoking, we need to reflect our intention through our deeds, our creations such as movies, in which incidence of smoking is shown much higher than the actual cigarette consumption among the indian population." - View of Mr X Assumptions : I. There is a strong link between films and viewers behaviour. II.smoking shown in movies results in corresponding increase in smoking among the public. III. Menace of smoking can be reduced by proper planing followed by the appropriate efforts. 1) Only I 2) Only II 3) Only II and III 4) Only I and III 5) all I, II and III