Chemical A is used for water softening to remove temporary hardness. A – McqOptions

MCQOPTIONS

1.	Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When \[C{{O}_{2}}\] is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?
A.	\[CaC{{O}_{3}}\]
B.	\[CaO\]
C.	\[Ca{{(OH)}_{2}}\]
D.	\[Ca{{\left( HC{{O}_{3}} \right)}_{2}}\]
Answer» D. \[Ca{{\left( HC{{O}_{3}} \right)}_{2}}\]

Discussion

No Comment Found

Related MCQs

Which of the following metal oxides is anti- ferromagnetic in nature?
Equal volumes of the gases which do not react together are confined in separate vessels. The pressure is 200 mm and 400 mm of Hg respectively. If the two gases are mixed together what will be the pressure of the resulting mixture (temperature remaining constant)
Under the influence of an electric field, heparticles in a sol migrate towards cathode. The coagulation of the same sol is studied using \[NaCl,N{{a}_{2}}S{{O}_{4}}\]and \[N{{a}_{3}}P{{O}_{4}}\] solutions. Their coagulating values will be in the order
Lyophilic sols are more stable than lyophobic sols because:
Indicate whether each of the following pairs are identical or not? (I) (II) (III)
A heat engine carries one mole of an ideal mono-atomic gas around the cycle as shown in the figure. Select the correct option:
The number of unpaired electrons in Gadolinium [Z=64] is
The molar heat capacity \[\left( {{C}_{p}} \right)\] of \[C{{D}_{2}}O\] is 10 cals at 1000 K. The change in entropy associated with cooling of 32 g of \[C{{D}_{2}}O\] vapour from 1000 K to 100 K at constant pressure will be: (D = deuterium, atomic mass = 2 u)
The electronic configuration of gadolinium (At. No. 64) is
Number average molecular mass, \[{{\overline{M}}_{n}}\] and weight average molecular mass \[\left( {{\overline{M}}_{w}} \right)\] of synthetic polymers are related as

Related Topics

Biology

Chemistry

Physics

Recent Visits