Which one of the following statements is not true?
- AClean water would have a $BOD$ value of $5 \ ppm$.
- BFluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration up to $1 \ ppm$.
- CWhen the $pH$ of rain water is higher than $6.5$,it is called acid rain.
- DDissolved Oxygen $(DO)$ in cold water can reach a concentration up to $10 \ ppm$.
Explore More
Similar Questions
When plants and animals decay,the organic nitrogen is converted into inorganic nitrogen. The inorganic nitrogen is in the form of
Medium
View SolutionThe irritant red haze in traffic and congested places is due to the presence of which of the following?
$(i)$ Oxides of sulphur
$(ii)$ Oxides of nitrogen
$(iii)$ Carbon dioxide
$(iv)$ Mists,smoke and dust
$(v)$ Smog
$(i)$ Oxides of sulphur
$(ii)$ Oxides of nitrogen
$(iii)$ Carbon dioxide
$(iv)$ Mists,smoke and dust
$(v)$ Smog
MediumAIIMS 2016
View SolutionGiven below are two statements :-
Statement $I :$ The value of the parameter "Biochemical Oxygen Demand $(BOD)$" is important for survival of aquatic life.
Statement $II :$ The optimum value of $BOD$ is $6.5 \ ppm$.
In the light of the above statements,choose the most appropriate answer from the options given below:
Statement $I :$ The value of the parameter "Biochemical Oxygen Demand $(BOD)$" is important for survival of aquatic life.
Statement $II :$ The optimum value of $BOD$ is $6.5 \ ppm$.
In the light of the above statements,choose the most appropriate answer from the options given below:
What percentage of the total atmosphere is occupied by the homosphere?
Easy
View Solution$A$ man uses municipal water. Due to water scarcity,he starts using groundwater. He experiences a laxative effect. What could be the reason for this?
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo