1 |
The oxidation of O -atom in OF3 is. |
-2
+2
-1
+1
|
2 |
The oxidation number of C in C12H22O11 is |
Zero
- 6
+ 6
12
|
3 |
The molar boiling point constant is the ratio of the elevation of boiling point to . |
Molarity
Molality
Mole fraction of solvent
Mole fraction of solute
|
4 |
Relative lowering of vapour pressure is equl to. |
Mole fraction of solute
Mole fraction of solvent
Molarity
Molality
|
5 |
An aqueous solution of ethanol is water has vaporu pressure. |
Equal to the of water
Equal to that of ethanol
More than that of H2O
Less than that of water
|
6 |
18 g glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to. |
1/5
5.1
1/51
6
|
7 |
Melting of ice can be forwarded by the use of. |
LiCl
BeCl2
NaCl
Ag Cl
|
8 |
Upper consulate temperature for water phenol system is. |
150 <sup>o</sup>C
65.9 <sup>o</sup>C
120 <sup>o</sup>C
130 <sup>o</sup>C
|
9 |
Catalyst used in preparation of NH3 from N2 and H2 is. |
Ni
Fe
Pt
V2O5
|
10 |
Optimum pressure in Haber's process for synthesis of Ammonia is |
100 -150 atm
200- 300 atm
350 - 450 atm
500 - 600 atm
|
11 |
_________ was derived by C.M Guldberg and P Waage in 1864 |
Law of conservation of Mass
Law of mass action
Law of conservation of energy
Distribution law
|
12 |
The law of mass action was given by |
D.C. down and P wage
Gay Lussic and C.M
C.M Goldberg and P. Waage
Hendeson and Le Chateller's
|
13 |
The optimum temperature for the synthesis of NH3 by Haber's process is. |
200 <sup>o</sup>C
300 <sup>o</sup>C
400 <sup>o</sup>C
500 <sup>o</sup>C
|
14 |
The born Haber cycle is the best application of law. |
Boyle's
Dalton's
Hess's
Graham's
|
15 |
The pressure of oxygen inside the bomb calorimeter is. |
100 atm
50 atm
25 atm
20 atm
|
16 |
The change in heat energy of a chemical reaction at constant temperature and pressure is called. |
Enthalpy change
Bond energy
Heat of sublimation
Internal energy change
|
17 |
The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is known as |
Henry's law
Hess's law
Joule's principle
Law of conservation of energy
|