Assertion: The concentration of pollutants in water or atmosphere is often expressed in terms of ppm Reason :Concentration in parts per million can be

Assertion: The concentration of pollutants in water or atmosphere is often expressed in terms of ppm
Reason :Concentration in parts per million can be expressed as mass to mass, volume of volume and mass to volume .
A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false
D. If both assertion and reason are false

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

Correct Answer - B
When a solute is present in trace quantities it is convenient to express concentration in ppm

4 views Answered 2023-02-05 15:29

Related Questions

Assertion:Nuclear sources will give a million times larger energy than conventional sources. Reason:Nuclear energy sources are massive than convention

2 Answers 9 Views

Assertion:Molar conductivity increases with decrease in concentration. Reason:Conductivity always decrease with decrease in concentration.

2 Answers 5 Views

One part of an element A combines with two parts of another element B,6 parts of element C combines with 4 parts of B. if A and C combine together the

2 Answers 4 Views

Suppose a pure Si crystal has ` 5 xx 10^(28)` atoms `m^(-3)` . It is droped by 1 ppm concentration of pentavalent As. Calculate the number of electron

2 Answers 4 Views

The nth term of a series is given by `t_(n)=(n^(5)+n^(3))/(n^(4)+n^(2)+1)` and if sum of its n terms can be expressed as `S_(n)=a_(n)^(2)+a+(1)/(b_(n)

2 Answers 5 Views

A sample ofsea water contains `5xx10^(-3)g` of dissolved oxygen in 1 kg of the sample. The concentration of `O_(2)` in that sea water sample in ppm is

2 Answers 5 Views

Rate of a reaction can be expressed by following rate expression, Rate =`K[A]^(2)[B]`, if conentration of A is incereased by 3 times and concentration

2 Answers 5 Views

A spherical ball contracts in volume by `0.02%` when subjected to a pressure of 100 atmosphere. Assuming one atmosphere is `10^(5)N//m^(2)`, the bulk

2 Answers 5 Views

A person has 400 million alveoli per lung with an average radius of 0.1 mm for each alveolus. Considering the alveoli are spherical in shape, the tota

2 Answers 4 Views

Two idential cylinders contain helium at 2.5 atmosphere and Argon at 1 atmosphere respectively. If both the gases are filled in one of the cylinders t

2 Answers 4 Views

এক্সাম দিয়ে মেধা যাচাই করুন

Job Preparation (1125)

Admission (754)

এসএসসি (10)

এইচএসসি (5)