20 grams of CaCO₃ is heated, how much calcium oxide will produce? – McqOptions

MCQOPTIONS

1.	20 grams of CaCO₃ is heated, how much calcium oxide will produce?
A.	5.6 grams
B.	11.2 grams
C.	22.4 grams
D.	44.8 grams
Answer» C. 22.4 grams

Discussion

No Comment Found

Related MCQs

1 kgf/cm is not equal to
The heat change for the reaction, C(s) + 2S(s) → CS(l), is 104.2 kJ. It represents the heat of
A sample of well water contains 140 gm/m Ca ions and 345 gm/m Naions. The hardness of the sample of water, expressed in terms of equivalent CaCO in gm/m is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)
The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol satisfies
Assuming that CO obeys perfect gas law, calculate the density of CO (in kg/m) at 263°C and 2 atm.
Heat capacity of air can be approximately expressed as, = 26.693 + 7.365 x10 , where, is in J/mole. and is in . The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to - 100°C is
Equal masses of CH and H are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is
6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H produced will be __________ gm.
At room temperature, the product [H] [OH] in a solution is 10 moles/litre. If, [OH] = 10 moles/litre, then the pH of the solution will be
Density of carbon dioxide is __________ kg/Nm.