1. Less than 20 min
2. Equal to 20 min
3. Greater than 20 min
4. None of these
Equal to 20 min
1. Rate =k [A]
2. Rate =k [A]3/2
3. Rate =k [A]0
4. Rate =k [A]2
Rate =k [A]2
1. 1.5
2. 1
3. 2
4. 3
1
1. 1
2. Zero
3. 2
4. cannot be calculated
cannot be calculated
1. No unit
2. mol L-1s-1
3. s-1
4. Lmol L-1s-1
Lmol L-1s-1
1. T
2. Z
3. Ea
4. P
Ea
1. 7.0x10-2L2mol-2s-1
2. 7.0x10-2Lmol-2s-1
3. 7.0x10-4Lmol-2s-1
4. 7.0x103L2mol-2s-1
7.0x103L2mol-2s-1
1. Less mass of powdered coal
2. Large surface area of coal dust
3. Lower ignitionb temperature of coal dust
4. Nature of coal dust
Large surface area of coal dust
1. A factor of 2
2. A factor of 4
3. A factor of 1/2
4. A factor of 1/4
A factor of 4
1. 160 min
2. 10 min
3. 20 min
4. 13 min 20 sec
13 min 20 sec