In a vessel, the gas is at a pressure P. If the mass of all the molecules is halved and their speed is doubled, then the resultant pressure will be:
A reaction having equal energies of activation for forward and reverse reactions has:
H = G = S=0
S = 0
G = 0
H = 0
The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because "O" in it refers to having:
overdominance of this type on the genes for A and B types
one antibody only - either anti-A or anti-B on the RBCs
no antigens A and B on RBCs
other antigens besides A and B on RBCs
The Gibbs energy for the decomposition of Al2O3 at 500oC is as follows:
The potential difference needed for the electrolytic reduction of aluminium oxide (Al2O3) at 500oC is at least:
The enthalpy of fusion of water is 1.435 kcal/mol. The molar entropy change for the melting of ice at 0°C is :
10.52 cal / (mol K)
21.04 cal / (mol K)
5.260 cal / (mol K)
0.526 cal / (mol K)
In which of the following reactions, standard reaction entropy change (S°) is Positive and standard Gibbs energy change (G°) decreases sharply with increasing temperature?
Equal volumes of two monoatomic gases A and B, at same temperature and pressure are mixed. The ratio of specific heats (Cp/Cv) of the mixture will be:
Which of the following is/are the hazardous pollutants present in automobile exhaust gases?
4) Oxides of nitrogen
2 & 3
1 & 2
2 & 4
1 & 3
Which one of the alkali metals, forms only, the normal oxide, on heating in air?
Which of the following oxides is not expected to react with sodium hydroxide?
Structures of some common polymers are given. Which one is not correctly presented?
The number of octahedral void (s) per atom present in a cubic close-packed structure is:
The Number of Carbon atoms per unit cell of diamond unit cell is :
Lithium metal crystallises in a body centered cubic crystal. If the length of the side of the unit cell of lithium is 351 pm.the atomic radius of the lithium will be:
In Castner-Kellner cell for production of sodium hydroxide:
Brine is electrolyzed with Pt electrodes
Brine is electrolyzed using graphite electrodes
Molten sodium chloride is electrolyzed
Sodium amalgam is formed at mercury cathode
Copper crystallises in a face-centered cubic lattice with a unit cell length of 361 pm.What is the radius of copper atom in pm?
A metal crystallizes with a face-centered cubic lattice. The edge length of the unit cell is 408 pm. The diameter of the metal atom is:
What is the density of gas at and 5.00 atm pressure? (R=0.0821 atm )
Which condition is not satisfied by an ideal solution?
Obeyance to Raoult's Law
The values of for the reaction, are 170kJ and 170, respectively. The reaction will be spontaneous at