Maths-
General
Easy
Question
A gas in an open container is heated from 27°C to 127°C. The fraction of the original amount of gas remaining in the container will b
Hint:
A gas is heated in open container. It is heated between two temperatures. We have to find the original fraction of gas left behind when it's heated. We will use the ideal gas equation and find the constant and variable values.
The correct answer is:
The ideal gas equation is PV = nRT
As the gas is heated in an open container, it's pressure is constant. The volume of the container is constant too. R is a constant.
n is number of moles and T is temperature. n denotes the amount of gas.
So, the above equation is nT = constant.
So, the temperature is inversely proportional to the gas.
The temperature they are heated from his 27°C to 127°C.
Let n1 be the original amount of gas and T1 be temperature at that time.
Let n2 be the amount of gas left after its heated. T2 is the temperature at that time.
We will write the temperature in Kelvin.
T1 = 27 + 273 = 300K
T2 = 127 + 273 = 400k
We know that nT= constant
So, we can write
n2T2 = n1T1
Dividing both the sides by T2
It means fraction of orginal amount is left.
For such questions, we should know idea gas equation. We have to be careful about constant and variable values. And we always have to convert the temperature into Kelvin. To convert the temperature in °C into Kelvin, we add 273 to it.
Related Questions to study
Maths-
If the sum of the ordinate and the abscissa of a point 
is 
(where 
are natural numbers) then the probability that 
does not line on the line 
is
If the sum of the ordinate and the abscissa of a point is (where are natural numbers) then the probability that does not line on the line is
Maths-General
Maths-
1 mole of N2O4 (g) at 300 K is kept in dosed container under 1 atm. It is heated to 600K when 20% mass of N2O4(g) decomposes to NO2(g). The resultant pressure is
1 mole of N2O4 (g) at 300 K is kept in dosed container under 1 atm. It is heated to 600K when 20% mass of N2O4(g) decomposes to NO2(g). The resultant pressure is
Maths-General
Maths-
If the minimum value of the expression 
can be expressed in the form 
where a, b N and are in their lowest term then the value of (a + b) equals
If the minimum value of the expression can be expressed in the form where a, b N and are in their lowest term then the value of (a + b) equals
Maths-General
Maths-
Consider the lines represented parametically as
L1 : 
L2 : 
Find equation of the plane P containing the line L2 and parallel to the line L1, is
Consider the lines represented parametically as
L1 :
L2 :
Find equation of the plane P containing the line L2 and parallel to the line L1, is
Maths-General
Maths-
let l ,m,n be the D.Cs of a vector 
and a,b,c are three numbers such that a,b,c are proprotionals to l,m,n i.e, 
are direction rations
be a vector having drs 
the angle between two lines whose DCs are 
is 
A vector 
has length 21 and drs 2,3,6 the dcs of when makes an obtuse angle with x-axis is
let l ,m,n be the D.Cs of a vector and a,b,c are three numbers such that a,b,c are proprotionals to l,m,n i.e, are direction rations
be a vector having drs the angle between two lines whose DCs are is
A vector has length 21 and drs 2,3,6 the dcs of when makes an obtuse angle with x-axis is
Maths-General
Maths-
equals to
equals to
Maths-General
Maths-
If A = 
, then det (adj. (adj. A)) is
If A = , then det (adj. (adj. A)) is
Maths-General
Maths-
Let S be a set containing n elements. Then the total number of binary operations on S is
Let S be a set containing n elements. Then the total number of binary operations on S is
Maths-General
Maths-
is equal to
is equal to
Maths-General
Maths-
The sum of 
The sum of
Maths-General
Maths-
If x is nearly equal to 1 such that 
, then the value of l is
If x is nearly equal to 1 such that , then the value of l is
Maths-General
Maths-
Greatest term (numerically) in the expansion of 
if 
and 
is
Greatest term (numerically) in the expansion of if and is
Maths-General
Maths-
Co-efficient of 
in the expansion of 
is
Co-efficient of in the expansion of is
Maths-General
Chemistry-
The removal of two atoms or groups, one generally hydrogen 
and the other a leaving group 
resulting in the formation of unsaturated compound is known as elimination reaction.
In 
(elimination) reactions, the 
bond is broken heterolytic ally (in step 1) to form a carbocation (as in 
reaction) in which 
) is lost (rate determining step). The carbocation (in step 2) loses a proton from the 
-carbon atom by a base (nucleophile) to form an alkene. reaction is favoured in compounds in which the leaving group is at secondary 
or tertiary 
position. In 
formed simultaneously. 
reactions occur in one step through a transition state.
reactions are most common in haloalkanes (particularly, 
) and better the leaving group higher is the reaction. In reactions, both the leaving groups should be antiplanar.
cb (Elimination unimolecular conjugate base) reaction involves the removal of proton by. a conjugate base (step 1) to produce carbanion which loses a leaving group to form an alkene (step 2) and is a slow step.
2-Bromobutane on heating with concentrated solution of alcoholic KOH gives major product as:
The removal of two atoms or groups, one generally hydrogen and the other a leaving group resulting in the formation of unsaturated compound is known as elimination reaction.
In (elimination) reactions, the bond is broken heterolytic ally (in step 1) to form a carbocation (as in reaction) in which ) is lost (rate determining step). The carbocation (in step 2) loses a proton from the -carbon atom by a base (nucleophile) to form an alkene. reaction is favoured in compounds in which the leaving group is at secondary or tertiary position. In formed simultaneously. reactions occur in one step through a transition state.
reactions are most common in haloalkanes (particularly, ) and better the leaving group higher is the reaction. In reactions, both the leaving groups should be antiplanar.
cb (Elimination unimolecular conjugate base) reaction involves the removal of proton by. a conjugate base (step 1) to produce carbanion which loses a leaving group to form an alkene (step 2) and is a slow step.
2-Bromobutane on heating with concentrated solution of alcoholic KOH gives major product as:
Chemistry-General
Chemistry-
The removal of two atoms or groups, one generally hydrogen and the other a leaving group resulting in the formation of unsaturated compound is known as elimination reaction.
In (elimination) reactions, the bond is broken heterolytic ally (in step 1) to form a carbocation (as in reaction) in which ) is lost (rate determining step). The carbocation (in step 2) loses a proton from the -carbon atom by a base (nucleophile) to form an alkene. reaction is favoured in compounds in which the leaving group is at secondary or tertiary position. In formed simultaneously. reactions occur in one step through a transition state.
reactions are most common in haloalkanes (particularly, ) and better the leaving group higher is the reaction. In reactions, both the leaving groups should be antiplanar.
cb (Elimination unimolecular conjugate base) reaction involves the removal of proton by. a conjugate base (step 1) to produce carbanion which loses a leaving group to form an alkene (step 2) and is a slow step.
Isopropyl chloride on heating with concentrated solution of ethanolic KOH gives mainly:
The removal of two atoms or groups, one generally hydrogen and the other a leaving group resulting in the formation of unsaturated compound is known as elimination reaction.
In (elimination) reactions, the bond is broken heterolytic ally (in step 1) to form a carbocation (as in reaction) in which ) is lost (rate determining step). The carbocation (in step 2) loses a proton from the -carbon atom by a base (nucleophile) to form an alkene. reaction is favoured in compounds in which the leaving group is at secondary or tertiary position. In formed simultaneously. reactions occur in one step through a transition state.
reactions are most common in haloalkanes (particularly, ) and better the leaving group higher is the reaction. In reactions, both the leaving groups should be antiplanar.
cb (Elimination unimolecular conjugate base) reaction involves the removal of proton by. a conjugate base (step 1) to produce carbanion which loses a leaving group to form an alkene (step 2) and is a slow step.
Isopropyl chloride on heating with concentrated solution of ethanolic KOH gives mainly:
Chemistry-General
