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Questions asked by meena.p
Questions
14353
questions
1
answer selected
What is the molecular mass of an ideal gas with pressure 1 atm, and density 10 g/L at temperature $27^{\circ}C$?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
First of the two ideal gases has twice molar volume as much as the second at same temperature, what is the ratio of their pressures?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
What is the Temperature of a 2 liter/mole ideal gas with pressure 10 atm?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
Which of the following is not true about ideal gas molecules?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
What is the shape of a P-T curve for ideal gas?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
Which of the following term does not involve in ideal gas law?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
A balloon of volume .666L at 1.03atm is placed in a pressure chamber where the pressure becomes 5.68atm, determine the new volume.
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
What will be the final pressure if the volume of the container changes to 2L?
sat
chemistry
gases and gas laws
asked
Sep 25, 2018
1
answer
The graph depicted below represents which of the gas laws?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Assume air contains 21% oxygen and 79% nitrogen. If air is compressed to 5.5atm, what is the partial pressure of the oxygen?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
As the temperature is raised from $20^{\circ}$ to $40^{\circ}C$ , the average kinetic energy of neon atoms charges by a factor of which of the following ?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Which is not true in case of an ideal gas ?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
When 200 milliliters of a gas at constant pressure is heated, its volume
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Which law is the following formula? $V_1T_1=V_2T_2$
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Assume air contains 21% oxygen and 79% nitrogen. If air is compressed to 5.5atm, what is the partial pressure of the oxygen?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Which of the following gas laws can be used to determine the total pressure of a mixture of gases?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Which of the following is a physical property of gases?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
A container filled with fluorine gas and neon gas and has a total pressure of 8atm. There are 50g of fluorine gas in the container, and the fluorine gas exerts a pressure of 5atm.Based on this, what is the mass of neon in the container?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Which of the following is not a characteristic of gases?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Which of the following gases will diffuse the quickest through a small hole?
sat
chemistry
gases and gas laws
asked
Sep 24, 2018
1
answer
Calculate enthalpy change when $2.38\;g$ of carbon monoxide vapourises at its normal boiling point. $\Delta H_{vap}$ of $CO=6.04\;kj\;mol^{-1}$
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 17, 2018
1
answer
Most metals react with acids to form
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 17, 2018
1
answer
A system does 200 J of work and at the same time absorbs 150 J of heat. What is the internal energy change ?
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 17, 2018
1
answer
The equilibrium constant for the reaction is 10. Calculate the value of $\Delta G^{-}$ given
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 17, 2018
1
answer
Enthalpy of combustion of carbon to carbon dioxide is $-393.5\;kJ\;mol^{-1}$. calculate the heat released upon formation of $35.2\;g$ of $CO_2$ from carbon to oxygen gas.
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 17, 2018
1
answer
A reaction ,$A+B \to C+D+q$ is found to have an positive entropy change. The reaction will be
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 17, 2018
1
answer
The enthalpies of all elements in their standard states are :
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 17, 2018
1
answer
In a process , 701 J of heat is absorbed by a system and $394\;J$ of work is done by the system . What is the change in internal energy for the process ?
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 17, 2018
1
answer
Calculate the entropy change when $36\;g$ of liquid water evaporates at $373\;K(\Delta _{vap} H=40.63\;kJ\;mol^{-1})$
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 14, 2018
1
answer
How much heat is required to raise the temperature of an aluminium vessel weighting 1.25 kg from $25^{\circ}C$ to $55^{\circ}$ ? Molar heat capacity of Al is $24\;J\;mol^{-1}K^{-1}$
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 14, 2018
1
answer
The average measure of two angles of a triangle is $80^{\circ}$. What is the measure of the third angle ?
sat
math
lines-angles-and-triangles
asked
Sep 14, 2018
1
answer
If the hypotenuse of a triangle is 5 meters, which of the following is the closest value to the area of the triangle ?
sat
math
lines-angles-and-triangles
asked
Sep 14, 2018
1
answer
In a triangle $\Delta ABC,\;AB=5\;cm,\;BC=7\;cm$. Which can be the length of the side AC ?
sat
math
lines-angles-and-triangles
asked
Sep 14, 2018
1
answer
Which of the following is not true about the hypotenuse of a right angled triangle ?
sat
math
lines-angles-and-triangles
asked
Sep 14, 2018
1
answer
The base angle of an isosceles trianlge is ten less than thrice the vertex angle the vertex angle ?
sat
math
lines-angles-and-triangles
asked
Sep 14, 2018
1
answer
If the base of a right angled triangle is 5 cm long and the height of the triangle is 7 cm longer than the base, what is the length of the third side of the triangle ?
sat
math
lines-angles-and-triangles
asked
Sep 14, 2018
1
answer
If $BA \perp AC$ and $DE \perp DF$ such that $BA=DE$ and $BF=EC$ then $\Delta ABC \approx \Delta DEF$ by congruency rule
sat
math
lines-angles-and-triangles
asked
Sep 14, 2018
1
answer
In the figure given below $DE \parallel QR$ and $AP$ and $BP$ are bisectors of $\angle EAB$ and $\angle RBA$ . Then $\angle APB$ is equal to
sat
math
lines-angles-and-triangles
asked
Sep 10, 2018
1
answer
Which of the below lines are parallel
sat
math
lines-angles-and-triangles
asked
Sep 10, 2018
1
answer
In the figure given below sides $QP$ and $RQ$ of $\Delta PQR$ are produced to point $S$ and $T$. If $\angle PQT = 110^{\circ}$ and $\angle SPR = 135^{\circ}$, then $\angle {PRQ} $ is
sat
math
lines-angles-and-triangles
asked
Sep 10, 2018
1
answer
When water is added to conc. $H_2SO_4$ it gets very hot. This happens because dilution of conc. $H_SO_4$ is ........
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 7, 2018
0
answers
The bond dissociation enthalpy of gaseous $H_2, Cl_2$ and $HCl$ are $435, 243$ and $431\; kJ mol^{-1},$ respectively. Calculate the enthalpy of formation of HCl gas.
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 7, 2018
1
answer
The enthalpies of combustion of carbon and carbon monoxide are $-393.5$ and $-283\;kJ\;mol^{-1}$ respectively . The enthalpy of formation of carbon monoxide per mole is
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 7, 2018
1
answer
The enthalpy change for a reaction does not depend upon
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 7, 2018
1
answer
For the reactions, $C+O_2 \to CO_2 ; \Delta H= -393\;J,2Zn +O_2 \to 2ZnO$; $\Delta H= -412\;J$
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 7, 2018
1
answer
If enthalpies of methane and ethane are respectively 320 and 360 calories then the bond energy of C−C bond is
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 4, 2018
1
answer
Energy required to dissociate 4 gm of gaseous hydrogen into free gaseous atoms is 208 kcal at $25^{\circ}C$.The bond energy of H−H bond will be
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 4, 2018
1
answer
The enthalpy of an ideal gas depends only on the temperature.
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 4, 2018
1
answer
Heat transferred at constant pressure _____ the enthalpy of a system.
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 4, 2018
1
answer
Which reaction will result in a negative entropy?
sat
chemistry
chemical-reactions-and-thermochemistry
asked
Sep 4, 2018
1
answer
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