11th Chemistry Important 3 Mark Question paper

St. Britto Hr. Sec. School - Madurai

11th Chemistry Important 3 Mark Question paper-Aug 2020

Time : 1.30 Hours

Part - A

Generic 3 - Answer All Question

At a certain temperature and total pressure of 10⁵Pa, iodine vapours contain 40% by volume of iodine atoms in the equilibrium I₂(g) u21cc 2I(g). Calculate K_p for the equilibrium

Write the simplest formula for the following. - H₂O

What are Clatharate hydrate? Explain it with suitable example.

0.24 g of a gas dissolves in 1 L of water at 1.5 atm pressure. Calculate the amount of dissolved gas when the pressure is raised to 6.0 atm at constant temperature.

Which of the following pairs of elements would have more negative electron gain enthalpy? (I) O or F(ii) For Cl.

Enthalpy of neutralization is always a constant when a strong acid is neutralized by a strong base: account for the statement

For the reaction at 298 K: 2A +B ⟶ C. ΔH = 400 J mol^-1; ΔS = 0.2 JK^-1 mol^-1Determine the temperature at which the reaction would be spontaneous.

What is the mass percentage of each component in a mixture containing 22g of methanol in 112g of benzene?

MnO₄^2- undergoes disproportionation reaction in acidic medium but MnO₄^- does not. Give reason.

Nitric acid is an oxidising agent and reacts with PbO but it does not react with PbO₂ Explain why?

What is meant by nodal surface or node?

3.24g of titanium reacts with oxygen to form 5.40g of the metal oxide. Find the empirical formula of the metal oxide?

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction 2A + 4B \(\longrightarrow \) 3C + 4D, when 5 moles of A react with 6 moles of B, then
(i) Which is the limiting reagent
(ii) Calculate the amount of C formed.

How does oxygen exchanges between maternal and fetal blood in a pregnant woman?

Balance the following reaction:
Cu + HNO₃\(\rightarrow\)Cu(NO₃)₂ + NO₂ + H₂O

How many elements can be accommodated in the long form of the periodic table? Explain.

Why are potassium and caesium, rather than lithium used in photochemical cells?

Alkali metals dissolve in liquid ammonia and given deep blue solution. Explain the magnetic behaviour of these solution.

Why electron affinity of fluorine is less than that of chlorine?

Calculate the equivalent mass of the following: Zn

Write the equations relating the four colligative properties by incorporating the Van't Hoff factor

Explain the Castner-Kellner process of manufacturing sodium hydroxide.

0.33 g of an organic compound containing phosphorous gave 0.397 g of Mg₂P₂O₇ by the analysis. Calculate the percentage of P in the compound.

Draw the structures of:
(i) 2-cyclobutyl propane
(ii) 2-cyclopropyl butane
(iii) chlorocyclo but-2-ene

Calculate the molar volume of the following 5 moles of methane

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11th Chemistry Important 3 Mark Question paper

St. Britto Hr. Sec. School - Madurai

11th Chemistry Important 3 Mark Question paper-Aug 2020

Part - A

Generic 3 - Answer All Question

At a certain temperature and total pressure of 105 Pa, iodine vapours contain 40% by volume of iodine atoms in the equilibrium I2(g) u21cc 2I(g). Calculate Kp for the equilibrium

Write the simplest formula for the following. - H2O

What are Clatharate hydrate? Explain it with suitable example.

0.24 g of a gas dissolves in 1 L of water at 1.5 atm pressure. Calculate the amount of dissolved gas when the pressure is raised to 6.0 atm at constant temperature.

Which of the following pairs of elements would have more negative electron gain enthalpy? (I) O or F(ii) For Cl.

Enthalpy of neutralization is always a constant when a strong acid is neutralized by a strong base: account for the statement

For the reaction at 298 K: 2A +B ⟶ C. ΔH = 400 J mol-1; ΔS = 0.2 JK-1 mol-1 Determine the temperature at which the reaction would be spontaneous.

What is the mass percentage of each component in a mixture containing 22g of methanol in 112g of benzene?

MnO42- undergoes disproportionation reaction in acidic medium but MnO4- does not. Give reason.

Nitric acid is an oxidising agent and reacts with PbO but it does not react with PbO2 Explain why?

What is meant by nodal surface or node?

3.24g of titanium reacts with oxygen to form 5.40g of the metal oxide. Find the empirical formula of the metal oxide?

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction 2A + 4B \(\longrightarrow \) 3C + 4D, when 5 moles of A react with 6 moles of B, then (i) Which is the limiting reagent (ii) Calculate the amount of C formed.

How does oxygen exchanges between maternal and fetal blood in a pregnant woman?

Balance the following reaction: Cu + HNO3\(\rightarrow\)Cu(NO3)2 + NO2 + H2O

How many elements can be accommodated in the long form of the periodic table? Explain.

Why are potassium and caesium, rather than lithium used in photochemical cells?

Alkali metals dissolve in liquid ammonia and given deep blue solution. Explain the magnetic behaviour of these solution.

Why electron affinity of fluorine is less than that of chlorine?

Calculate the equivalent mass of the following: Zn

Write the equations relating the four colligative properties by incorporating the Van't Hoff factor

Explain the Castner-Kellner process of manufacturing sodium hydroxide.

0.33 g of an organic compound containing phosphorous gave 0.397 g of Mg2P2O7 by the analysis. Calculate the percentage of P in the compound.

Draw the structures of: (i) 2-cyclobutyl propane (ii) 2-cyclopropyl butane (iii) chlorocyclo but-2-ene

Calculate the molar volume of the following 5 moles of methane

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At a certain temperature and total pressure of 10⁵Pa, iodine vapours contain 40% by volume of iodine atoms in the equilibrium I₂(g) u21cc 2I(g). Calculate K_p for the equilibrium

Write the simplest formula for the following. - H₂O

For the reaction at 298 K: 2A +B ⟶ C. ΔH = 400 J mol^-1; ΔS = 0.2 JK^-1 mol^-1Determine the temperature at which the reaction would be spontaneous.

MnO₄^2- undergoes disproportionation reaction in acidic medium but MnO₄^- does not. Give reason.

Nitric acid is an oxidising agent and reacts with PbO but it does not react with PbO₂ Explain why?

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction 2A + 4B \(\longrightarrow \) 3C + 4D, when 5 moles of A react with 6 moles of B, then
(i) Which is the limiting reagent
(ii) Calculate the amount of C formed.

Balance the following reaction:
Cu + HNO₃\(\rightarrow\)Cu(NO₃)₂ + NO₂ + H₂O

0.33 g of an organic compound containing phosphorous gave 0.397 g of Mg₂P₂O₇ by the analysis. Calculate the percentage of P in the compound.

Draw the structures of:
(i) 2-cyclobutyl propane
(ii) 2-cyclopropyl butane
(iii) chlorocyclo but-2-ene