Choose the correct alternative: o-Nitrophenol has lower/higher `pK_b` value than m-nitrophenol.

Choose the correct alternative: Earthworm has two/four paris of lateral hearts.

Choose the correct alternative: Aniline is less/more basic than ethylamine.

Choose the correct alternative: Alloys usually have much (lower//higher) temperature coefficients of resistance than pure metals.

Choose the correct alternative from the clues given at the end of the each statement: The size of the atom in Thomson model is..... the atomic size in Rutherford model( much greater than /no different from/ much less than.)

Choose the correct alternative from the clues given at the end of the each statement: An atom has a nearly continuous mass distribution in a ..........but has a highly non-uniform mass distribution in ..........(Thomson Model/ Rutherford model)

Choose the correct alternative:- The energy required to launch an orbiting satellite out of earth’s gravitational influence is more//less than the energy required to project a stationary object at the same height (as the satellite) out of earth’s influence.

Choose the correct alternative :- The formula -GMm (1//r_2 1//r_1) is more//less accurate than the formula mq(r_2- r_1) for the difference of potential energy between two points r_2 and r_1 , distance away from the centre of the earth.

Give reasons fer the following : o-nitrophenol is more acidic than o-methoxyphenol.

Choose the correct alternative: Elevation of boiling point of 0.1 m CaCl_2 solution less/more than 0.1m NaCl solution.

Choose the correct alternative: Alloys of metals usually have (greater//less) resistivity than that of their constituent metals.