Ask a Question

Select the incorrect statement from the following option. (a)Permanent hardness is due to dissolved chlorides and sulphates of calcium and magnesium

← Prev Question Next Question →
+1 vote
662 views
in Engineering Chemistry II by (789k points)
Select the incorrect statement from the following option.

(a) Permanent hardness is due to dissolved chlorides and sulphates of calcium and magnesium

(b) It can be removed by mere boiling of water

(c) It is also known as non-alkaline hardness

(d) The difference between the total hardness and the alkaline hardness gives the non-alkaline hardness

This question was addressed to me during an interview.

Question is taken from Hardness of Water topic in section Water and its Treatment of Engineering Chemistry II

1 Answer

+1 vote
by (1.3m points)
selected by
 
Best answer
The correct choice is (b) It can be removed by mere boiling of water

To elaborate: Unlike temporary hardness, permanent hardness is not destroyed on boiling. Varoius methods are adopted for the removal of permanent hardness like zeolites, lime-soda process etc. All the other options are correct.

Related questions

Welcome to TalkJarvis QnA, a question-answer community website for the people by the people. On TalkJarvis QnA you can ask your doubts, curiosity, questions and whatever going in your mind either related to studies or others. Experts and people from different fields will answer.

Most popular tags

biology – class 12 biology – class 11 construction & building materials chemistry – class 12 electronic devices & circuits network theory data structures & algorithms ii cell biology ic engine insurance finance money computational fluid dynamics engineering physics i discrete mathematics chemistry – class 11 aerodynamics casting-forming-welding i engineering mathematics operating system casting-forming-welding ii engineering drawing mysql engineering geology digital circuits wireless mobile energy management electrical measurements digital communications cyber security analytical instrumentation embedded systems electric drives cytogenetics advanced machining computer fundamentals life sciences basic civil engineering iot design of electrical machines physics – class 12 applied chemistry dairy engineering basic chemical engineering cloud computing microprocessor bioinformatics aircraft design aircraft maintenance software engineering drug biotechnology digital signal processing biochemistry data structures & algorithms i automotive engine design avionics engineering material & metallurgy energy engineering cognitive radio unix electrical machines biomedical instrumentation object oriented programming electromagnetic theory power electronics analog communications bioprocess engineering civil engineering drawing engineering metrology physics – class 11 mathematics – class 12 engineering chemistry i basic electrical engineering unit processes mongodb signals and systems cryptograph & network security hadoop mathematics – class 11 engineering physics ii html control systems engineering mechanics antennas analog circuits computer network java sql server javascript concrete technology chemical process calculation artificial intelligence design of steel structures c++ database management computer architecture engineering chemistry ii corrosion engineering chemical technology dc machines
Powered by TalkJarvis
...