Maths-
General
Easy
Question
Which of the following has period 2
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- None of these
The correct answer is:
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At C, pure water has . The value of K w at Cis
At C, pure water has . The value of K w at Cis
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Let where denotes the greatest integer function.Then is equal to
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The dissociation constant of acetic acid is and that of ammonium hydroxide is also 1.8 x 10-5 at 25°C. Hence, an aqueous solution of ammonium acetate is:
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Which one of the following solutions will have the highest pH value?
Which one of the following solutions will have the highest pH value?
Chemistry-General
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Given that the dissociation constant for water is Kw: . The pH of a 0.001 molar KOH solution is:
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Chemistry-General
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A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of the cycle the volume of the gas increases from V to 32 V, the efficiency of the engine is
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Physics-General
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A mass of diatomic gas(y=1.4) at a pressure of 2 atmospheres is compressed adiabatically so that its temperature rises from 27C to 927C.The pressure of the gas in final state is
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A system goes from A to B via two processes I and II as shown in figure .If U1and if U2 are the changes in internal energies in the processes I and II respectively, then the relation between If U1andIf U2is
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A refrigerator works between 4°C and 30°C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is: (Take 1 cal =4.2joule)
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An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume V1and contains ideal gas at pressure P1 and temperature T1 The other chamber has volume V2 and contains ideal gas at pressure P2 and temperature T2. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be
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Carbon monoxide is carried around P K to1000K in going from a to b. The quantity of heat rejected by the gas during the process ca is
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The relation between U,P and V for an ideal gas in an adiabatic process is given by relation U = a+ b P V. Find the value of adiabatic exponent of this gas
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Physics-General
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Two rods of the same length and diameter having thermal conductivities K1 and K2 are joined in parallel. The equivalent thermal conductivity of the combination is
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Physics-General