Which of the following pollutants will lead to the depletion of ozone layer?
Which of the following pollutants will lead to the depletion of ozone layer? A. chlorofluorocarbon B. carbon (ii)…
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The molecular shape and bond angle of water are respectively
The molecular shape and bond angle of water are respectively A. linear, 180° B. bent, 109.5° C. tetrahedral,…
Na(_2)CO(_3) + 2HCl (to) 2NaCl + H(_2)O + CO(_2) The indicator most suitable for this…
Na(_2)CO(_3) + 2HCl (to) 2NaCl + H(_2)O + CO(_2) The indicator most suitable for this reaction should have…
At 27°C, 58.5g of sodium chloride is present in 250cm(^3) of a solution. The solubility…
At 27°C, 58.5g of sodium chloride is present in 250cm(^3) of a solution. The solubility of sodium chloride…
Which of the following properties increases from left to right along the period but decreases…
Which of the following properties increases from left to right along the period but decreases down the group…
Which of the following does not support the fact that air is a mixture?
Which of the following does not support the fact that air is a mixture? A. the constituents of…
What technique is suitable for separating a binary solution of potassium chloride and potassium trioxochlorate…
What technique is suitable for separating a binary solution of potassium chloride and potassium trioxochlorate (V)? A. Fractional…
The heat of formation of ethene, C(_2)H(_4) is 50 kJmol(^{-1}), and that of ethane, C(_2)H(_6)…
The heat of formation of ethene, C(_2)H(_4) is 50 kJmol(^{-1}), and that of ethane, C(_2)H(_6) is -82kJmol(^{-1}). Calculate…
Which of the following statements about catalyst is false?
Which of the following statements about catalyst is false? A. biological catalysts are called enzymes B. catalyst do…
Consider the reaction A(_{(s)}) + 2B(_{(g)}) → 2C(_{(aq)}) + D(_{(g)}) What will be the effect…
Consider the reaction A(_{(s)}) + 2B(_{(g)}) → 2C(_{(aq)}) + D(_{(g)}) What will be the effect of a decrease…