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To make lime plaster, limestone (calcium carbonate) is heated above approximately 50 °C to produce quicklime.

To make lime plaster, limestone (calcium carbonate) is heated above approximately 50 °C to produce quicklime. Correct Answer False

To make lime plaster, limestone (calcium carbonate) is heated above approximately 850 °C to produce quicklime. Water is then added to produce slaked lime (calcium hydroxide), which is sold as a wet putty or a white powder. Additional water is added to form a paste prior to use. The paste may be stored in airtight containers.

Related Questions

Which of the following statement(s) is/are correct?
1. If sodium carbonate and washing soda is mixed in water the hardness of water can be removed.
2. The reaction of the chemicals produce sodium sulphate, sodium carbonate and insoluble calcium carbonate.
3. Magnesium sulphate chloride and magnesium carbonate is also produced.
Select the correct answer
Consider the pairs. S.No Reaction Example 1. Combination Limestone changing into quicklime in the presence of heat 2. Decomposition reaction when Iron nails are dipped in copper sulphate solution 3. Displacement Calcium oxide and water producing slaked lime Which among the above pairs is correct?
In a village 50% of the villagers produce rice, 40% of the villagers produce apples and 50% of the villagers produce vegetables, 20% of the villagers produce rice and apples both, 25% of the villagers produce apples and vegetables both, 20% of the villagers produce rice and vegetables both and 10% of the villagers produce all three. Find the percentage of villagers who do not produce anything.
1. A student fitted the required apparatus to collect carbondioxide in the gas jars. 2. The student took out some substance from the bottle labelled calcium carbonate and put it in the woulfe's bottle. 3. Then the student poured some from the bottle labelled dilute hydrochloric acid on the calcium carbonate contained in the woulfe's bottle. 4. considering the above mentioned facts maximum how many hypotheses are possible relating to the causes of non-collection of the gas in the gas jar?
A fluidized bed combustion system having an output of 35 MW at 80% efficiency when using a coal of heating value 26 MJ/kg with a sulphur content of 3.6% requires a particular limestone to be fed to it at a calcium-sulphur molar ratio of 3.0 so as to limit emissions of SO2 adequately. The limestone used contains 85% CaCO3. The required flow rate of limestone will be
A rotary drum filter with 30% submergence is used to filter concentrated aqueous slurry of calcium carbonate containing 15lb of solids per cubic foot of water. The pressure–drop is 2011Hg. If the filter cake contains 50% mixture (wet basis), calculate the filter area required to filter 10 gal/min of slurry. The filter cycle time is 5 min. The specific cake resistance depends on the pressure–drop as: α (ft/lb) = α (Δp)0.26, where α = 2.90×1010 Viscosity of the filtrate = 6.72×10-4 lb/ft-s. Density of calcium carbonate = 168.8 lb/ft3. Neglect filter medium resistance.
The following are the conditions for selecting list of a suitable candidates to be called for interview after the written test for the recruitment is conducted/ organized for management-level persons of a multi-national company. For providing accounting services and sales the candidates must (a) be holding a graduation in basic science with 65% or above or B. E degree with 55% and above marks (b) have passed the written test with 70% or above marks (c) the age must be in the group 25 to 30 years as on 1/4/18 (d) have experience in an accounting firms for three years and diploma in accounting with 60% or above marks (e) be presently drawing CTC of 6 Lakhs per annum and above In case the applicant who satisfies all other terms above except 1) at (a) above, then be referred as Junior Accountant 2) at (d) & (e) above then be referred as Trainee-Accountant Satisfying all the above with experience of 5 years then be referred as senior-Accountant Satisfying all the above criteria (a-e) with CA/ ICWA / MBA (Finance) then be refereed as manager (Accounts) Read all the above information and answer the following question Shravani has passed H. SC with 72% of marks. She has done diploma in accountancy with 62% of marks. She was working with an organization in the field of accounting in the field of accounting from 4 years and was drawing CTC of 6.5 Lakhs presently. She is 28yrs as on July 2018. She may referred for the position of:
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