Answer
425.1k+ views
Hint: Torr is a unit of pressure named after the scientist Evangelista Torricelli who discovered the principle of a barometer. Torr was named in the honor of the inventor of the barometer, Evangelista Torricelli. One unit of gas pressure is expressed as a millimeter of mercury (mmHg).
Complete step by step answer:
Torr is a unit of pressure. It is defined as exactly \[1/760\;\] of a standard atmosphere. The relation between the torr and millimeter of mercury is the following:
\[{\text{1 Torr = 0}}{\text{.999999857533699 mm Hg}} \approx 1mm Hg\]
\[{\text{1 mm Hg = 1}}{\text{.000000142466321 Torr}}\]
1 torr is equal to the 1mm of Hg.
Hence, the correct option is (A) is correct.
Additional information:
Pressure (p) is the force applied perpendicular to the surface of an object per unit area.
Some other units of pressure are below.
The bar (denoted by the bar), defined as \[{\text{100 kPa}}\] exactly.
The atmosphere (denoted by atm), defined as \[101.325kPa\].
These pressure units are used in different places. Torr is widely used to measure atmospheric pressure, in engineering.
The S.I. unit of pressure is Pascal (denoted by Pa), which is equal to one Newton per square meter \[\left( {{\text{N/}}{{\text{m}}^{\text{2}}}} \right)\]. The pressure is a scalar quantity.
Note:
Earlier, one torr was intended to be the same as one "millimeter of mercury", but subsequent redefinitions of the two units made them slightly different.
It is one of the measuring units in a high vacuum.
Complete step by step answer:
Torr is a unit of pressure. It is defined as exactly \[1/760\;\] of a standard atmosphere. The relation between the torr and millimeter of mercury is the following:
\[{\text{1 Torr = 0}}{\text{.999999857533699 mm Hg}} \approx 1mm Hg\]
\[{\text{1 mm Hg = 1}}{\text{.000000142466321 Torr}}\]
1 torr is equal to the 1mm of Hg.
Hence, the correct option is (A) is correct.
Additional information:
Pressure (p) is the force applied perpendicular to the surface of an object per unit area.
Some other units of pressure are below.
The bar (denoted by the bar), defined as \[{\text{100 kPa}}\] exactly.
The atmosphere (denoted by atm), defined as \[101.325kPa\].
These pressure units are used in different places. Torr is widely used to measure atmospheric pressure, in engineering.
The S.I. unit of pressure is Pascal (denoted by Pa), which is equal to one Newton per square meter \[\left( {{\text{N/}}{{\text{m}}^{\text{2}}}} \right)\]. The pressure is a scalar quantity.
Note:
Earlier, one torr was intended to be the same as one "millimeter of mercury", but subsequent redefinitions of the two units made them slightly different.
It is one of the measuring units in a high vacuum.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Why Are Noble Gases NonReactive class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
At which age domestication of animals started A Neolithic class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)