D:-21
Correct Answer:- Option-C

Question29:-The law starting that "the partial pressure of the gas in vapour phase is proportional to the mole fraction of the
gas in the solution" is known as

A:-Raoults law

B:-Dalton's law of partial pressure
C:-Ostwald's dilution law
D:-Henry's law

Correct Answer:- Option-D

Question30:-The excess pressure that is applied to the solution to prevent the passage of solvent in to it through a semi
permeable membrane is referred to as

A:-Partial pressure
B:-Critical pressure
C:-Osmotic pressure
D:-None of these
Correct Answer:- Option-C
Question31:-The hybridisation of carbon in Graphite is

A:"dsp*2""
B:-sp

பொழது
0: "5012:

Correct Answer:- Option-D
Question32:-Isotonic solutions have
A:-Same osmotic pressure
B:-same freezing point
C:-same melting point
D:-same boiling point
Correct Answer:- Option-A
Question33:-Best method to prevent corrosion of iron is
A:-making iron cathode
B:-making iron anode
C:-put it in saline water
D:-make it in contact with atmosphere
Correct Answer:- Option-A
Question34:-The half life of first order reaction with rate constant 'K' is given by
*([R_(O)I/(2K)°
(൫൨൪009
(0.693)/(2K)°
D:-* (0.693)/(K)*
Correct Answer:- Option-D
Question35:-Unit of first order reaction is

8:- 7011 ^ (-1)5^-1
C:-mol*(-1)LS*(-1)°
D:-dimensionless
Correct Answer:- Option-A
Question36:-Which of the following constitute Daniel cell?
A:-Zn-Hg cell
B:-Zn-Cu cell
C:-Zn-Ag cell
D:-Cu-Hg cell
Correct Answer:- Option-B
Question37:-The correct formula for plaster of paris is
"850 4.24 20"
"९७50 4" ப 20
"(250 4" .` (1)/(2) "20
0:-` "02.250 4" , ` "1 20"
Correct Answer:- Option-C
Question38:-Permanent hardness of water is due to the presence of