The Chance of survival among young ones of viviparous animals are more than those of oviparous animals, why?

Anonymous User Biology Reproduction in Organism 04 Apr, 2020 89 views

Name an Organism showing oblique binary fission.

Anonymous User Biology Reproduction in Organism 04 Apr, 2020 75 views

For an elementary reaction

Anonymous User Chemistry Chemical Kinetics 04 Apr, 2020 63 views

If CP and Cdenote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then

Anonymous User Physics Thermodynamics 04 Apr, 2020 114 views

A Carnot engine, having an efficiency of n = 1/10 as a heat engine, is used as a refrigerator. If the work done on the system is 10 J, what will be the amount of energy absorbed from the reservoir at a lower temperature?

Anonymous User Physics Thermodynamics 04 Apr, 2020 60 views

When a system is taken from state i to state f along the path iaf, it is found that Q = 50 cal and W = 20 cal. Along the path ibf Q = 36 cal. W along the path ibf is

Anonymous User Physics Thermodynamics 04 Apr, 2020 64 views

Two rigid boxes containing different ideal gases are placed on a table. Box A contains one mole of nitrogen at temperature T0, while Box B contains one mole of helium at temperature (7/3) T0. The boxes are then put into thermal contact with each other and heat flows between them until the gases reach a common final temperature. (Ignore the heat capacity of boxes). Then, what will be the final temperature of the gases, Tf, in terms of T0?

Anonymous User Physics Thermodynamics 04 Apr, 2020 64 views

The work of 146 kJ is performed in order to compress one kilo mole of gas adiabatically and in this process the temperature of the gas increases by 7ºC. The gas is (R = 8.3 J mol-1 K-1)

Anonymous User Physics Thermodynamics 04 Apr, 2020 89 views

A gaseous mixture consists of 16 g of helium and 16 g of oxygen. What is the ratio Cp / Cv Vof the mixture?

Anonymous User Physics Thermodynamics 04 Apr, 2020 123 views

A system goes from A to B via two processes I and II as shown in the below figure. If  and  are the changes in internal energies in the processes I and II respectively, then

Anonymous User Physics Thermodynamics 04 Apr, 2020 59 views

The temperature­ entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is

Anonymous User Physics Thermodynamics 04 Apr, 2020 62 views

Which of the following is incorrect regarding the first law of thermodynamics?

Anonymous User Physics Thermodynamics 04 Apr, 2020 62 views

Two thermally insulated vessels 1 and 2 are filled with air at temperatures (T1, T2 ), volume (V1, V2 ), and pressure (P1, P2 ), respectively. If the valve joining the two vessels is opened, the temperature inside the vessel at equilibrium will be

Anonymous User Physics Thermodynamics 04 Apr, 2020 83 views

Which of the following statements is correct for any thermodynamic system?

Anonymous User Physics Thermodynamics 04 Apr, 2020 54 views

Which of the following statements is correct for any thermodynamic system?

Anonymous User Physics Thermodynamics 04 Apr, 2020 62 views

Which of the following statements is correct for any thermodynamic system?

Anonymous User Physics Thermodynamics 04 Apr, 2020 60 views

One mole of ideal monoatomic gas  is mixed with one mole of diatomic gas . What is  for the mixture?

Note:  denotes the ratio of specific heat at constant pressure, to that at constant volume.

Anonymous User Physics Thermodynamics 04 Apr, 2020 60 views

A Carnot engine takes 3 × 10cal of heat from a reservoir at 627°C, and gives it to a sink at 27°C. What is the work done by the engine?

Anonymous User Physics Thermodynamics 04 Apr, 2020 60 views

Which of the following parameters does not characterize the thermodynamic state of matter?

temperature / pressure / work / volume

Anonymous User Physics Thermodynamics 04 Apr, 2020 64 views

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio for the gas is

Anonymous User Physics Thermodynamics 04 Apr, 2020 56 views

Heat cannot by itself flow from a body at lower temperature to a body at the higher temperature, is a statement or consequence of

Anonymous User Physics Thermodynamics 04 Apr, 2020 77 views

1 mole of a gas with = 7/5 is mixed with 1 mole of a gas with = 5/3, then what is the value of  for the resulting mixture?

Anonymous User Physics Thermodynamics 04 Apr, 2020 62 views

Even Carnot engine cannot give 100% efficiency because we cannot

Anonymous User Physics Thermodynamics 04 Apr, 2020 63 views

At what temperature is the r.m.s. velocity of a hydrogen molecule is equal to that of an oxygen molecule at 47°C?

Anonymous User Physics Thermodynamics 04 Apr, 2020 60 views

Cooking gas containers are kept in a lorry moving with uniform speed. What will be the temperature of the gas molecules inside?

Anonymous User Physics Thermodynamics 04 Apr, 2020 64 views

Which statement is incorrect?

Anonymous User Physics Thermodynamics 04 Apr, 2020 60 views

Heat given to a body which raises its temperature by 1°C is

Anonymous User Physics Thermodynamics 04 Apr, 2020 61 views

An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume V1 and 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

Anonymous User Physics Thermodynamics 04 Apr, 2020 79 views

Area bounded by the curve y = x + sinx and its inverse function between the ordinates x = 0 and  in sq. units is

Anonymous User Maths Area 02 Apr, 2020 80 views

Area of the region bounded by y = |x| and y = 1 - |x| in sq. units is

Anonymous User Maths Area 02 Apr, 2020 65 views

Area of the region bounded by y = |x| and y=2 in sq. units is

Anonymous User Maths Area 02 Apr, 2020 66 views

The area bounded by , axis of abscissa and two ordinates corresponding to two points of minima of the function y = f(x) is

Anonymous User Maths Area 02 Apr, 2020 65 views

The area bounded by   and  is

Anonymous User Maths Area 02 Apr, 2020 62 views

The area enclosed between the curve  and the co-ordiante axes is

Anonymous User Maths Area 02 Apr, 2020 60 views

The area (in square units) of the region bounded by

is

Anonymous User Maths Area 02 Apr, 2020 74 views

The area bounded between the parabolas  and  , and the straight line y = 2 is

Anonymous User Maths Area 02 Apr, 2020 66 views

The area bounded by the curves  and is

Anonymous User Maths Area 02 Apr, 2020 71 views

The area bounded by the curves y=cosx and y=sin x between the ordinates x=0 and

Anonymous User Maths Area 02 Apr, 2020 65 views

The area under the curve  with boundaries as X-axis and the ordinates x = 0, x = 3 in sq. units is

Anonymous User Maths Area 02 Apr, 2020 69 views

The area (in square units) bounded by the curves  , x-axis and lying in the first quadrant is

Anonymous User Maths Area 02 Apr, 2020 69 views

A body is thrown vertically up to reach its maximum height in t seconds. The total time from the time of projection to reach a point at half of its maximum height while returning (in seconds) is

Anonymous User Physics 02 Apr, 2020 102 views

Calculate rms speed of O2 at 273 K and 1 * 10^5Pa pressure. The density of O2 under these conditions is 1.42 kg m–3.

Anonymous User Chemistry 01 Apr, 2020 458 views

Calculate the pressure exerted on the walls of a 3 litre flask when 7 gms of N2 are introduced into the same at 27°C.

Anonymous User Chemistry 01 Apr, 2020 93 views

Explain the following
a) Although Au is soluble in aqua-regia, Ag is not
b) Zinc and hot copper is used for recovery of Ag from the complex [Ag(CN)2]–

c) Aluminium metal is frequently used as a reducing agent for extraction of metal such as chromium manganese etc.

d) Partial roasting of sulphide ore is done in the metallurgy of copper.

Anonymous User Chemistry Matallurgy 31 Mar, 2020 75 views

Cinnabar (HgS) and galena (PbS) on roasting often gives their respective metals but zinc blende (ZnS) does not. Explain.

Anonymous User Chemistry Matallurgy 31 Mar, 2020 81 views

Aluminium cannot be prepared by the electrolysis of aqueous solution of its salts. Why?

Anonymous User Chemistry Matallurgy 31 Mar, 2020 66 views

Write short notes on Amalgamation , Hydrometallurgy, Self reduction, Electrolytic reduction?

Anonymous User Chemistry Matallurgy 31 Mar, 2020 72 views

If two tangents drawn from a point P to the parabola y2 = 4x are at right angles, then the locus of P is

Anonymous User Maths Parabola 31 Mar, 2020 72 views

A person is to count 4500 currency notes. Let an denote the number of notes he counts in the nth minute.If a1 =a2 =...=a10 =150 and a10, a11,....arein an A.P. with common difference –2, then the time taken by him to count all notes is

Anonymous User Maths Sequences and Series 31 Mar, 2020 63 views

The line L given by   passes through the point (13, 32). The line K is parallel to L and has the equation

.Then the distance between L and K is?

Anonymous User Maths Linear Programming 31 Mar, 2020 70 views