Std-10 Most Imp Ch 1 Gseb L-11 રસાયણિક પ્રક્રિયાઑ અને સમીકરણ

Water expands when it freezes. Determine amount of work in joules, done when a system consisting of 1.0 L of liquid water freezes under a constant pressure of 1.0 atm and forms 1.1 L of ice.

Suppose the line, L_(1) has equation 10x-12y=-17." The line "L_(2)"intersect "L_(1)" at "((1)/(2),(11)/(6)) and is perpendicular to L_(1). Find the abscissa of the point on L_(2) whose ordinate is (1)/(30).

The solubilty of barium sulphate at 298 K is 1.1 xx 10^(-5) "mol " L^(-1) . Calculate the solubilty product of barium sulphate at the same temerature.

The solubility of barium sulphate at 298 K is 1.1 xx10^(-5) mol L^(-1) . Calculate the solubility product of barium sulphate at the same temperature .

Two wires of diameter 0.25 cm , one made of steel and other made of brass, are loaded as shown in the figure. The unloaded length of the steel wire is 1.5 m and that of brass is 1.0 m . Young's modulus of steel is 2.0 xx 10^(11) Pa and that of brass is 1.0 xx 10^(11) Pa. Compute the ratio of elongations of steel and brass wires. (/_\l_("steel"))/(/_\l_("brass"))=?

The sum sum _ ( k = 1 ) ^ ( 20 ) k ( 1 ) / ( 2 ^ k ) is equal to l - (11) /(m ^ ( 19 )) . The value of ( l + m ) is ______ .

The heat librerated on complete combustion of 1 mole of CH_(4) gas to CO_(2)(g) and H_(2)O(l) is 890 kJ. Calculate the heat evolved by 2.4 L of CH_(4) on complete combustion.