# For a reaction X→Y,the rate of the reaction has been found to be third order with respect to X. What happens when the concentration of X is doubled:

1.  Rate becomes double

2.  Rate becomes three times

3.  Rate becomes six times

4.  Rate becomes eight times

4

Rate becomes eight times

Explanation :
No Explanation available for this question

1.  k[NO][O2]

2.  k[NO3][O]

3.  k[NO]2[O2]

4.  k[NO][O2]/ [NO2]

4

k[NO]2[O2]

Explanation :
No Explanation available for this question

# For the reaction, 2NO2→2NO+O2 rate is expressed as

1.  -1/2(d[NO2]/dt)=-1/2(d[NO]/dt)=d[O2]/dt

2.  -2(d[NO2]/dt)=-1/2(2d[NO]/dt)=d[O2]/dt

3.  -1/2(d[NO2]/dt)=1/2(d[NO]/dt)=d[O2]/dt

4.  -d[NO2]/dt=(d[NO]/dt)=2d[O2]/dt

4

-1/2(d[NO2]/dt)=1/2(d[NO]/dt)=d[O2]/dt

Explanation :
No Explanation available for this question

# The rate constant of a reaction is 1.2x10-5mol-2litre2s-1,the order of the reaction is

1.  Zero

2.  1

3.  2

4.  3

4

3

Explanation :
No Explanation available for this question

# The most common contituent of steel is

1.  C

2.  O

3.  Cr

4.  S

4

C

Explanation :
No Explanation available for this question

# Which of the following ores cannot be cocentrated by froth floatation process

1.  Bauxite

2.  Cinnabar

3.  Galena

4.  Copper pyrite

4

Bauxite

Explanation :
No Explanation available for this question

# Which of the following is not an ore of iron

1.  Magnetite

2.  Siderite

3.  Cerrusite

4.  Limonite

4

Cerrusite

Explanation :
No Explanation available for this question

# A common metal which can be used for the extraction of metals from their oxides by reduction is

1.  C

2.  Co

3.  Al

4.  Fe

4

Al

Explanation :
No Explanation available for this question

# An example of halide ore is

1.  Galena

2.  Bauxite

3.  Cinnabar

4.  Cryolite

4

Cryolite

Explanation :
No Explanation available for this question

# The method for the purification of impure metals which is based upon the phenomenon of electrolysis is called

1.  Electrorefining

2.  Hydrometallurgy

3.  Poling

4.  Liquation

4