Stoichiometry Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity?Vapour pressure of water at 20°C is 17.5 mm Hg. 79.62 80.38 78.51 80 79.62 80.38 78.51 80 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The number of H⁺ in 1 c.c solution of pH 13 is 10¹³ 6.023 xl0¹³ 6.023xl0⁷ 6.023 x 10¹⁰ 10¹³ 6.023 xl0¹³ 6.023xl0⁷ 6.023 x 10¹⁰ ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The atomic heat capacities of all solid elements __________ with decrease in temperature. Remains unchanged Approach zero at 0°C Increases Decreases Remains unchanged Approach zero at 0°C Increases Decreases ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The heat evolved in the combustion of benzene is represented by the equation: C₆H₆ + 7.5 O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kgmole. -1632.3 +1632.3 -2448.45 +816.15 -1632.3 +1632.3 -2448.45 +816.15 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Pick out the wrong unit conversion of thermal conductivity. 1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F 1 BTU/ft².hr.°F/ft = 1.488 kcal/m². hr.°C/m 1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K 1 BTU/ft².hr.°F/inch = 1.488 kcal/m². hr.°C/m 1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F 1 BTU/ft².hr.°F/ft = 1.488 kcal/m². hr.°C/m 1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K 1 BTU/ft².hr.°F/inch = 1.488 kcal/m². hr.°C/m ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Two solutions A₁ and A₂ have pH value of 2 and 6 respectively. It implies that the solution Both A & C A₁ is more alkaline than solution A₂ A₁ is highly acidic A₁ is very slightly acidic Both A & C A₁ is more alkaline than solution A₂ A₁ is highly acidic A₁ is very slightly acidic ANSWER DOWNLOAD EXAMIANS APP
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