For a first-order reaction A → B the reaction rate at a reactant concentration of 0.01M is found to be . The half-life period of the reaction is:
1. | 300s | 2. | 30s |
3. | 220s | 4. | 347s |
By which can activation energy be calculated?
1. At a constant temperature
2. At two different temperature
3. For reversible reaction
4. For volatile reaction
If the concentration of a solution is changed from 0.2 to 0.4, then what will be rate and rate constant. The reaction is of first order and rate constant is :
1.
2.
3.
4.
Half-life of a radioactive sample is 4 days. After 16 days what quantity of matter remains undecayed?
1.
2.
3.
4.
The rate of a first-order reaction is 1.5 ×10–2 mol L–1 min–1 at 0.5 M concentration of the reactant. The half-life of the reaction is:
1. | 23.1 min | 2. | 8.73 min |
3. | 7.53 min | 4. | 0.383 min |
If the bombardment of α-particle on \(N_{7}^{14}\) emits protons, then new atom will be:
1. \(O_{8}^{17}\)
2. \(O_{8}^{16}\)
3. \(C_{6}^{14}\)
4. Ne
If the half-life of a substance is 77 days then it's decay constant (days-1) will be:
1. | 0.9 | 2. | 0.09 |
3. | 0.009 | 4. | 0.013 |
1.
2.
3.
4.
92U235, nucleus absorb a neutron and disintegrate in 54Xe139, 38Sr94 and x . The product x is:
1. 3 - neutrons
2. 2 - neutrons
3. α - particle
4. β - particle
rate of reaction is equal to:-
1.
2.
3.
4.