Recent questions tagged class11

Given $\;t_{r}=1^2+2^2+.......\;r^2$ and $t_{1}+t_{2}+t_{3}+...\;t_{n}=\large\frac{k}{12}\;n\;(n+1)\;(n+2)\;$ the value of k will be

asked Jan 23, 2014 by yamini.v

1 answer

The temperature versus volume of an ideal gas is shown below.

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Pressure versus Temperature graph of an ideal gas is shown below. Then which of the options that follow forms the corresponding P-V Diagram?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Which of the following quantities depend on temperatures only for a given ideal gas?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Which of the following quantities depend on temperatures only for a given ideal gas?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

The molar heat capacity for an ideal gas is?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Which of the following statements is false about the molar heat capacity of the ideal gas?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Which of the following quantities is independent of the nature of gas at the same temperature?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

The quantity $\large\frac {mRT^2}{\rho}$ of an ideal gas is proportional to the:

asked Jan 22, 2014 by balaji.thirumalai

2 answers

Internal energy of a system remains constant when it undergoes?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A gas with $\large\frac {C_p}{C_v} = \gamma$ goes from an initial state of $(P_1,V_1,T_1)$ to a final state of $(P_2,V_2,T_2)$ through an adiabatic process. The work done by the gas is?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

In a given process, $\large\frac{1}{k}$th part of the supplied heat goes in raising internal energy of the gas. Finding the molar specific heat of the gas and the process gives?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

In a given gas sample of Hydrogen, one fifth of the heat supplied is used to raise the internal energy of the gas. Finding the molar specific heat of the gas gives?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Neon gas has undertaken a process in which the pressure and the volume are changed according to the equation $P=kV^k$. The molar hear capacity of the gas for the process is given by?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Helium gas has undertaken a process in which the pressure and the volume are changed according to the equation $P=kV^2$. If $C_v$ is the molar specific heat at constant volume, then the molar hear capacity of the gas for the process is given by?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

If $2$ moles of an ideal monoatomic gas at tempterature $5T_0$ is mixed with $3$ moles of another ideal monoatomic gas at temperature $3T_0$, what will be the temperature of the mixture?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Four geometric means are inserted between $\;2^{9}-1\;and \;2^{9}+1\;.$ The product of these means is :

asked Jan 22, 2014 by yamini.v

0 answers

If $1$ mole of an ideal monoatomic gas is mixed with 2 moles of an ideal diatomic gas, what is the temperature of the given mixture, given that the monoatomic gas is at temperature $T_0$ and diatomic gas is at temperature $2T_0$?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

$p\;(x)=\large\frac{1+x^2+x^4+\;...\;x^{2n-2}}{1+x+x^2+\;...\;+x^{n-1}}\;$ is a polynomial in x , then n must be

asked Jan 22, 2014 by yamini.v

1 answer

A student conducted an experiment and found that an ideal gas obeys the condition $\large\frac{p^2}{\rho} = $ constant. Initially the gas is at a temperature $T$, pressure $p$ and density $\rho$. The gas expands such that the density changes to $\rho/2$, which of the following is true?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

If in an AP , $\;a_{n}\;$ denotes the $\;n^{th}$ term and $\;a_{p}=\frac{1}{q}$ and $\;a_{q}=\frac{1}{p}$ the root of the equation

asked Jan 22, 2014 by yamini.v

1 answer

Let p be the statement “x is an irrational number”, q be the statement “y is a transcendental number” and r be the statement “x is a rational number iff y is a transcendental number”. \[\] S1 : r is equivalent to either q or p \[\] S2 : r is equivalent to $ ^{\sim}(p \leftrightarrow \: ^{\sim}q)$

asked Jan 22, 2014 by thanvigandhi_1

1 answer

S1:$ ^{\sim} (p \leftrightarrow\: ^{\sim} q)$ is equivalent to $p \leftrightarrow q.$ \[\] S2 :$ ^{\sim} (p\leftrightarrow \: ^{\sim} q)$ is a tautology.

asked Jan 22, 2014 by thanvigandhi_1

1 answer

If $\;a_{1},a_{2},\;....\;a_{n}$ are in HP then $\;\large\frac{a_{1}}{a_{2}+a_{3}+\;..\;+a_{n}}\;,\large\frac{a_{2}}{a_{1}+a_{3}+...+a_{n}}\;,\large\frac{a_{3}}{a_{1}+a_{2}+a_{4}+\;...\;+a_{n}}\;,.....\;\large\frac{a_{n}}{a_{1}+a_{2}+....+a_{n-1}}\;$ are in

asked Jan 22, 2014 by yamini.v

1 answer

Given : $P(x) =x^4 + ax^3 + bx^2 + cx + d$ such that $x=0$ is the real root of $P'(x)=0$. If $P(-1) < P(1)$, then in the interval $[-1, 1]$, which of the following statement is wrong.

asked Jan 22, 2014 by thanvigandhi_1

1 answer

The pressure versus volume graph for an ideal gas of equal number of moles at different temperature are plotted as shown in the figure. Choose the correct alternative:

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A pressure-temperature graph of an ideal gas is shown below. Choose the correct alternative (assume equal number of moles of different volumes).

asked Jan 22, 2014 by balaji.thirumalai

1 answer

In the cylinder shown below the two pistons are connected by a string. Assume that the piston can move freely, what happens when the gas trapped between the pistons are heated?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Three different gases, one monoatomic, one diatomic and one triatomic are expanded adiabatically under similar conditions, i.e., their final and initial conditions are the same. The least amount of work is done in the case of which gas?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

The below graph shows the behaviour of 3 gases undergoing adiabatic expansion. Which of the following can be true?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Let A and B denote the statements \[ \] A: $ \cos \alpha + \cos \beta + \cos \gamma = 0$ \[\] B: $ \sin \alpha + \sin \beta + \sin \gamma = 0$ \[\] If $ \cos(\beta- \alpha) + \cos( \gamma- \alpha) + \cos( \alpha - \beta)= -\large\frac{3}{2}$, then

asked Jan 22, 2014 by thanvigandhi_1

1 answer

A closed vessel moving with a velocity $v$ (with zero acceleration) is stopped suddenly. If the vessel contains a gas of molecular mass $M$, what will the rise in temperature of the gas be?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

If a , b , c are in AP and A.G are arithmetic and geometric mean , between a and b while $\;A^{|}\;and\;G^{|}$ are A.M and G.M between B and C . then

asked Jan 22, 2014 by yamini.v

1 answer

For a regular polygon, let r and R be the radii of the inscribed and the circumscribed circles. A false statement among the following is

asked Jan 22, 2014 by thanvigandhi_1

1 answer

One mole of a monoatomic ideal gas is mixed with two moles of a diatomic gas. What is the molar specific heat of the mixture at constant volume?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

The inverse of the converse of a conditional statement is the _______________.

asked Jan 22, 2014 by thanvigandhi_1

1 answer

What is true about the statement "If two angles are right angles, the angles have equal measure" and its converse "If two angles have equal measure then the two angles are right angles"?

asked Jan 22, 2014 by thanvigandhi_1

1 answer

If $a , b , c$ are three numbers in GP . and $\;a+x\;,b+x\;,c+x\;$ are in HP then $x$ equals

asked Jan 22, 2014 by yamini.v

1 answer

If under standard conditions a gas of density $1.2 kg/m^3$ has sound propagating in it with velocity of $340 m/s$, what is its atomicity/

asked Jan 22, 2014 by balaji.thirumalai

1 answer

If a , b , c , d are in HP $\;\large\frac{d^{-2}-a^{-2}}{c^{-2}-b^{-2}}\;$ equals

asked Jan 22, 2014 by yamini.v

1 answer

In a class of 50 students, 18 take music, 26 take art, and 2 take both art and music. How many students in the class are not enrolled in either music or art?

asked Jan 22, 2014 by thanvigandhi_1

1 answer

An air bubble is at the bottom of the lake at $40m$ deep where the temperature is $6^{\circ}C$. The bubble rises to the surface where the temperature is $20^{\circ}C$ If it's volume at the bottom is $50\;cm^3$, what is its volume at the surface?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

During hydrogenation of oil the catalyst commonly used is

asked Jan 22, 2014 by sreemathi.v

1 answer

If x , y , z are in GP then , $\;\large\frac{1}{x^2-y^2}+\frac{1}{y^2}\;$ equals

asked Jan 22, 2014 by yamini.v

1 answer

Among the hydrides given below which are reasonably good acids.

asked Jan 22, 2014 by sreemathi.v

1 answer

An air bubble is at the bottom of the lake at $40\;m$ deep where the temperature is $0^{\circ}C$. The bubble rises to the surface where the temperature is $20^{\circ}C$ If it's volume at the bottom is $50\;cm^3$, what is its volume at the surface?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

For $\;n \in N \;n \geq 25$ , Let A.G.H be A.M ,G.M and H.M of 25 and n . what is the least value of n such that A.G.H are all natural numbers greater than 25 .

asked Jan 22, 2014 by yamini.v

1 answer

The process of adsorption of hydrogen on palladium is known as

asked Jan 22, 2014 by sreemathi.v

1 answer

Metal hydride on treatment with water gives:-

asked Jan 22, 2014 by sreemathi.v

1 answer

The metal which gives hydrogen on treatment with acid as well as sodium hydroxide is

asked Jan 22, 2014 by sreemathi.v

1 answer

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