MPBSE PYQs_>Chemistry Chapter 1_Solutions:

2026 Paper Set C
Q1:	(i) The presure of solution that just prevents the flow of solvent is called (a)Vapour pressure.  (b) Osmotic Pressure (c) Partial Pressure (d) Gas Pressure इसका सही जवाब हैं Osmotic Pressure || Bhai baat essi yah ki koi solution • agar 2 solution ko join karte ho, fir जो पतला सोल्यूशन होगा उससे पानी निकलके गाढे solution में चला जाता हैं, ताकी दोनो में same गाढ़ापन हो जाए || इसको chem की भाषा मे low concentration से पानी / या कोई अन्य solvent निकल के गाढे solution या high concentration वाले solution के तरफ जाना बोलते है। • Main baat hai ki yeh proces ko Osmosis bolte hai, aur jitne pressure se solvent बीच की boundary wall पर लगा ता है उसको osmotic pressure बोलते है	{1M}
Q3:	(i) All _____ properties are related with decreasing in osmotic pressure इसका सही जवाब है - colligative properties क्या आपको मालूम है	1M}
Q18:	(i) Calculate the mole fraction of ethylene glycol ($C_2H_6O_2$) in a solution containing 20% of $C_2H_6O_2$ by mass. (ii) Calculate molality of 2.5 g of ethanoic acid ($CH_3COOH$) in 75 g of benzene	[4M]
2026 Sample Paper in
Q1:	(i) The mixture of Copper and Zinc is an example of    (a)Liquid-solid solution   (b) Solid - Solid solution   (c) Gas - liquid solution   (d) Gas - solid solution	{1M}
Q3:	(i) All _____ properties are related witg decreasing in osmotic pressure	{1M}
Q18:	(i) Calculate the mole fraction of ethylene glycol ($C_2H_6O_2$) in a solution containing 20% of $C_2H_6O_2$ by mass. (ii) Calculate molality of 2.5 g of ethanoic acid ($CH_3COOH$) in 75 g of benzene	[4M]
2024
Q2:	(v) The solubility of a gas is determined by ___ law	{1M}
Q5:	(v) Write the definition of molality	{1M}
Q19:	Define Osmotic Pressure and based on this derive a mathematical expression to determine the molecular weight (mass) of a solute. OR Define depression in freezing point and based on this derive a mathematical exprssion to  determine the molecular weight (mass) of a solute	[4M]