States of Matter

Attempt now to get your rank among 1074 students!

Question 1

A solution is formed of 45 g Napthelene (a non-volatile compound, MW = 128 g/mol) and 41 g of ethanol (MW = 46.02 g/mol). Find the vapor pressure of solution at 25 °C
(The vapor pressure of pure ethanol at 25.0 °C is 96 torr)

• A96 torr
• B90 torr
• C68.86 torr
• D27.168 torr

Question 2

“X”, a nonvolatile organic compound was used to make up a solution. Solution I contains 2.50 g of X dissolved in 200 g of water and has a vapor pressure of 754.5 mmHg at the normal boiling point of water. The molar mass of Z is.

• A40 g/mol
• B31.023 mol
• C31.023 gm
• D31.023 g/mol

Question 3

The graphs of vapour pressure of substances P, Q, R, S are given below:Identify the substance if the different substances for which the graphs are drawn are C₆H₅NH₂, CS₂, CH₃OH, H₂O

• AP = CS₂
• BQ = CS₂
• CR = C₆H₅NH₂
• DS = H₂O

Question 4

The volume of of O₂ obtained by decomposition of KClO₃ and collected by displacement of water is at a pressure of at . The pressure of water vapour(mm Hg) at is :

• A754
• B730
• C22
• D24

Question 5

Which of these compound has both frenkel and schottky defect?

• ANaCl
• BAgCl
• CAgBr
• DAgI

Question 6

Frenkel defect appears in –

• AAgI
• BZnS
• CAgBr
• DAll

Question 7

Which of the following statements is not true?

• ADensity of solid gets increased due to interstitial defects
• BFrenkel defects do not alter the density of the solid
• CNon-stoichiometric defects modify the formula of the compound
• DNon-stoichiometric defects do not alter the density of the solid

• 1074 attempts
• 11 upvotes
• 11 comments