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Engineering
220 Views   |

units of rate constant of first and zero order reactions in terms of molarity M unit are respectively

• Option 1)

$sec^{-1},Msec^{-1},$

• Option 2)

$sec^{-1},M$

• Option 3)

$Msec^{-1},sec^{-1},$

• Option 4)

$M,sec^{-1},$

As we learnt in Zero Order Reaction - Zero order reaction means that the rate of the reaction is proportional to zeroth power of the concentration of reactants   - wherein  time required for half completion of reaction     First Order Reaction - The rate of the reaction is proportional to the first power of the concentration of the reaction - wherein Formula: R            P a               ...
Engineering
122 Views   |

For the reaction $\dpi{100} A+2B\rightarrow C,$ rate is given by $\dpi{100} R=\left [ A \right ]\left [ B \right ]^{2}$  then the order of the reaction is

• Option 1)

3

• Option 2)

6

• Option 3)

5

• Option 4)

7

As we learnt in Order of a Reaction - The order of a reaction is determined as the sum of the powers of the concentration terms that appear in the experimental rate equation. It is an experimental quantity. - wherein Formula:                                        Order has relation with stoichiometry & is determined experimentally. It can be zero/fraction/negative/positive    for reaction...
Engineering
116 Views   |

The differential rate law for the reaction

$\dpi{100} H_{2}+I_{2}\rightarrow 2HI$  is

• Option 1)

$-\frac{d\left [ H_{2} \right ]}{dt}=-\frac{d\left [ I_{2} \right ]}{dt}=-\frac{d\left [ HI \right ]}{dt}$

• Option 2)

$\frac{d\left [ H_{2} \right ]}{dt}=\frac{d\left [ I_{2} \right ]}{dt}=\frac{1}{2}\frac{d\left [ HI \right ]}{dt}$

• Option 3)

$\frac{1}{2}\frac{d\left [ H_{2} \right ]}{dt}=\frac{1}{2}\frac{d\left [ I_{2} \right ]}{dt}=-\frac{d\left [ HI \right ]}{dt}$

• Option 4)

$-2\frac{d\left [ H_{2} \right ]}{dt}=-2\frac{d\left [ I_{2} \right ]}{dt}=\frac{d\left [ HI \right ]}{dt}$

As we learnt in  Instantaneous Rate - The rate of a reaction calculated at a particular instant of time is called Instantaneous Rate   - wherein Formula =      or Option 1) Incorrect option Option 2) Incorrect option Option 3) Incorrect option Option 4) Correct option
Engineering
978 Views   |

The formation of gas at the surface of tungsten due to adsorption is the reaction of order

• Option 1)

0

• Option 2)

1

• Option 3)

2

• Option 4)

insufficient data.

As we learnt in  Zero Order Reaction - Zero order reaction means that the rate of the reaction is proportional to zeroth power of the concentration of reactants   - wherein  time required for half completion of reaction    Adsarption on metal surface do not depends on concertraction of gas ie Zeroth order reaction. Option 1) 0 Correct Option Option 2) 1 Incorrect Option Option 3) 2 Incorrect...
Engineering
197 Views   |

If half-­life of a substance is 5 yrs, then the total amount of substance left after 15 years, when initial amount is 64 grams is

• Option 1)

16 grams

• Option 2)

2 grams

• Option 3)

32 grams

• Option 4)

8 grams

As learnt in concept First Order Reaction - The rate of the reaction is proportional to the first power of the concentration of the reaction - wherein Formula: R            P a                 0 a-x             x   [differentiate rate law] Unit of       T1/2 = 5 years X = 8 gm Option 1) 16 grams This option is incorrect.  Option 2) 2 grams This option is incorrect.  Option 3) 32...
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