Question

${\textbf{ \textsf {\red{Question :}}}}$
• ɴᴀᴍᴇ 2 ᴘʀᴏᴘᴇʀᴛɪᴇs ᴏғ ᴀ sᴜʙsᴛᴀɴᴄᴇ ᴛᴏ ᴄʜᴇᴄᴋ ɪᴛs ᴘᴜʀɪᴛʏ.​

Answer 1

${\pmb{\bf{\sf{Required \; Solution...}}}}$

★ Name two properties of a substance to check it's purity.

Two properties of a substance to check that substance purity is given below:

• 1st property = Melting point.

• 2nd property = Boiling point.

Melting point = The temperature at which solid and the liquid forms of the substance exist at equilibrium or both forms have same vapour pressure is called melting point.

Boiling point = The temperature at which the vapour pressure of the liquid is equal to atmospheric pressure is called boiling point.

• Boiling point for Water is 373 K

• Boiling point for Ethanol is 349 K

• Boiling point for Chlroform is 334 K

• Boiling point for Acetone is 329 K

${\pmb{\bf{\sf{Additional \; knowledge...}}}}$

$\begin{gathered}\boxed{\begin {array}{c|c|c|c}\sf Temperature \:Scale &\sf Ice\:point &\sf Steam \;point &\sf No\;of\:division\:on\:Fundamental\;interval \\ \frac {\qquad\qquad\qquad}{} &\frac{\qquad\qquad\qquad}{} & \frac {\qquad\qquad\qquad}{} & \frac {\qquad\qquad\qquad\qquad\qquad\qquad}{} \\ \sf Celsius\;scale & \sf0^\circ C &\sf100^\circ C &\sf 100\\&&&\\ \sf Fahrenheit\:scale & \sf32^\circ F &\sf 212^\circ F &\sf180 \\&&&\\ \sf Kelvin\;scale &\sf273K &\sf373K & \sf100\\&&&\\ \sf Reaumer \:scale &\sf0^\circ R &\sf80^\circ R &\sf80\end {array}}\end{gathered}$

Answer 2

Answer:

RequiredSolution...

RequiredSolution...

★ Name two properties of a substance to check it's purity.

Two properties of a substance to check that substance purity is given below:

1st property = Melting point.

2nd property = Boiling point.

Melting point = The temperature at which solid and the liquid forms of the substance exist at equilibrium or both forms have same vapour pressure is called melting point.

Explanation:

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