MEDIUM
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Which amendment lowered the voting age from 21 to 18 years?

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Important Questions on Linear Inequalities

EASY
Scandium is a transition element. But zinc is not. Why?
EASY
500 J of heat energy is removed from 4 moles of a monoatomic ideal gas at constant volume. The temperature drops by
EASY
Describe the total degrees of freedom for mono-atomic molecule, diatomic molecule and triatomic molecule.
MEDIUM
Three moles of oxygen are mixed with two moles of helium. What will be the ratio of specific heats at constant pressure and constant volume for the mixture?
EASY
During an adiabatic process, the pressure of a mixture of monatomic and diatomic gases is found to be proportional to the cube of the temperature. Find the value of γ=CpCv.
EASY
Water is used as a coolant because 
EASY
Estimate the total number of air molecules in a room of capacity 25 m3 at a temperature of 27°C.
EASY
When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is
EASY
If universal gas constant is R, the essential heat to increase from 273 K to 473 K at constant volume for monoatomic ideal gas of 4 mol is
MEDIUM
A gaseous mixture enclosed in a vessel contains 1 g mole of a gas A (with γ=5/3 ) and another gas B (with γ=7/5 ) at a temperature T. The gases A and B do not react with each other and are assumed to be ideal. The number of gram moles of B if γ for the gaseous mixture is 19/13 is:
HARD
One mole of an ideal monatomic gas at temperature T0 expands slowly according to the law PV=c. If the final temperature is 2T0, heat supplied to the gas is: (c is a constant)
EASY
The ratio γ = CpCv for a gas mixture consisting of 8 g of helium and 16 g of oxygen is 
EASY
The temperature of a silver bar rises by 10°C when it absorbs 1.23 kJof energy by heat. The mass of the bar is 525 g. Determine the specific heat of silver.
MEDIUM
Derive the ratio of two specific heat capacities of mono-atomic, diatomic and triatomic molecules.
EASY
In the above question, if γ=1.5, the gas may
EASY
Two mole of oxygen is mixed with eight mole of helium. The effective specific heat of the mixture at constant volume is _____R.
EASY
If CP and Cv denote the specific heats of unit mass of nitrogen at constant pressure and volume respectively, then:
EASY
In a process, temperature and volume of one mole of an ideal monoatomic gas are varied according to the relation VT=K, where K is a constant. In this process the temperature of the gas is increased by T. The amount of heat absorbed by gas is ( R is gas constant):
EASY
Energy of all molecules of a monatomic gas having a volume V and pressure P is 3/2 PV. The total translational kinetic energy of all molecules of a diatomic gas at the same volume and pressure is
MEDIUM
The molar specific heat of a gas as given from the kinetic theory is 52R. If it is not specified whether it is Cp or Cv , one could conclude that the molecules of the gas