NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 525 - 530 of 1259
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Question number: 525
» States of Matter » Solid State » Voids
Question
Which of the following crystal has the Antifluorite structure?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | AgCl | |
b. | HgS | |
c. | AgI | |
d. | Na2O | |
Question number: 526
» Chemical Kinetics » Collision Theory of Bimolecular Gaseous Reactions
Question
According to Arrhenius theory, the rate is directly proportional to the number of effective collisions , here Z is?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Collision fraction | |
b. | Collision frequency | |
c. | Collision coefficient | |
d. | Question does not provide sufficient data or is vague | |
Question number: 527
» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions
Question
A substance reacts with initial concentration of a mol/dm3 according to zero order kinetics. The time it takes for the completion of the reaction is (k = rate constant)?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 2k/a | |
b. | a/k | |
c. | a/2k | |
d. | k/a | |
Question number: 528
» Chemical Kinetics » Activation Energy
Question
Activation energy of a reaction is?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Minimum amount of energy needed to overcome potential barrier | |
b. | The energy released during the reaction | |
c. | The energy needed to form one mole of product | |
d. | The energy evolved when activation complex is formed | |
Question number: 529
» Chemical Kinetics » Rate of a Chemical Reaction
Question
Molecularity of a reaction is?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | A whole number | |
b. | Can be zero | |
c. | Never a whole number | |
d. | Can have a fractional value | |
Question number: 530
» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions
Question
90 % of the first order reaction is completed in 70 minutes. The velocity constant of the reaction is?
Choices
| Choice (4) | Response | |
|---|---|---|
a. | 0.329 | |
b. | 0.0329 | |
c. | 3.29 | |
d. | 0.0293 | |