IIT JEE/IIT JEE Nuclear Chemistry Sample Test,Sample questions

Question:
.Which of the following statements is incorrect about electrochemical cell?

1.Salt bridge maintains the electrical neutrality of the electrolytes

2.Chemical energy is converted into electrical energy

3.Electrons are released at anode

4.Cell can work indefinitely


Question:
A compound of xenon and fluorine is found to have 53.3% Xe. What is the oxidation number of Xe in this compound? (At. mass F = 19)-

1.0

2.4

3.4

4.6


Question:
A current of 9.65 ampere is passed through the aqueous solution of NaCl using suitable electrodes for 1000 s. The amount of NaOH formed during electrolysis is

1.2.0 g

2.4.0 g

3.6.0 g

4.8.0 g


Question:
A direct current deposits 54 g of silver (At. mass = 108) during the electrolytic reaction. The same amount of electricity would deposit aluminium (At. mass = 27) from aluminium chloride solution equal to

1.4.5 g

2.5.4 g

3.54 g

4.27 g.


Question:
After two hours one sixteenth of the original quantity of a certain radioactive substances remains unchanged. The half life period of the substance is

1.30 minutes

2.40 minutes

3.25 minutes

4.45 minutes


Question:
An electrode chemical cell stops working after some time because

1.the reduction potential of one electrode becomes equal to that of the other

2.electrode potential of both the electrodes increases

3.one electrode is broken

4.None of the above


Question:
Artificial radioactivity was discovered by

1.Hahn and Strassman

2.Joliot and Irene Curie

3.Eienstein

4.Rutherford


Question:
Atom A possesses higher values of packing fraction than atom B. the relative stabilities of A and B are

1.B is more stable than A

2.+

3.A and B both are equally stable

4.Stability does not depend on packing fraction


Question:
Burning of lime to give calcium oxide is

1.oxidation process

2.redox process

3.disproportionation

4.decomposition.


Question:
Electrolytes conduct electric current:

1.by movement of electric charge through them

2.by the movement of ions

3.by the movement of molecules

4.by allowing electrons to flow through them from cathode to anode


Question:
Gamma rays are

1.Low energy waves

2.High energy protons

3.High energy electron

4.High energy electromagnetic waves


Question:
How much copper can be deposited by 2.5 Faraday of electricity?

1.2 moles

2.2.5 moles

3.1.25 moles

4.0.125 moles.


Question:
Hydrogen bomb is based on the phenomenon of

1.Nuclear explosion

2.Chemical reaction

3.Nuclear fusion

4.Nuclear fission


Question:
If half life period of radium is 1580 years its average life period will be

1.1275 years

2.2175 years

3.2275 years

4.2400 years


Question:
In order to get 9 gm of aluminium (At. mass = 27) during the electrolysis experimentHow many Faraday of electricity has to be passed?

1.3 Faraday

2.2 Faraday

3.1 Faraday

4.1.5 Faraday.


Question:
In which of the following chemical changes take place?

1.Ammeter

2.Voltameter

3.Micrometer

4.Galvanometer


Question:
In which of the following compoundvalency of carbon is 4 but its oxidation number is zero

1.methane

2.carbon dioxide

3.carbon monoxide

4.Formaldehyde.


Question:
Out of the following the one which has no charge isAlpha rays

1.Gamma rays

2.Beta rays

3.Alpha rays

4.Cathode rays


Question:
Positron emission results from the transformation of one nuclear proton into a neutron. The isotope thus produced possesses

1.intense radioactivity

2.higher nuclear charge

3.no radioactivity

4.same mass number


Question:
Radio-activity was discovered by

1.J.J. Thomson

2.Madame Curie

3.Henry Becquerel

4.Rutherford


Question:
Radium and chlorine combine to form radium chloride the compound is

1.as radioactive as the radium content

2.half as radioactive as the radium content

3.thrice as radioactive as the radium content

4.no longer radioactive


Question:
The age of most ancient geological formation is estimated byPotassium-Argon method

1.Uranium lead method

2.Radium-silicon method

3.Carbon 14 dating method

4.Potassium-Argon method


Question:
The half-life of a radioactive element is 50 days. How long will it take far its activity reduce to 1/4 of it original value?

1.100 days

2.75 days

3.50 days

4.25 days


Question:
The nucleus of radioactive element possesseslow binding energy

1.zero binding energy

2.high potential energy

3.high binding energy

4.low binding energy


Question:
The oxidation sate of phosphorus is + 3 in

1.Orthophosphoric acid

2.Phosphorus acid

3.Metaphosphoric acid

4.Pyrophosphoric acid.


Question:
The unit of radioactivity is

1.Becquerel

2.Rutherford

3.Curie

4.both Curie and Rutherford


Question:
Uranium gives stable isotope of

1.radon

2.krypton

3.polonium

4.radium


Question:
What is the fuel of atomic pile?

1.Uranium

2.Petroleum

3.Sodium

4.Thorium


Question:
When a radioactive nucleus emits an alpha particle the mass number of the atom

1.remains same and its atomic number decreases

2.decreases and its atomic number increases

3.decreases and its atomic number decreases

4.increases and its atomic number decreases


Question:
When a radioactive substance is subjected to a vacuum the rate of disintegration per second

1.increases only if the products are gaseous

2.increase considerably

3.decreases

4.is not affected


Question:
Which of the following process always involve the decrease in oxidation number?

1.Hydrolysis

2.Decomposition

3.Reduction

4.Oxidation.


Question:
Who gave the theory of radioactive disintegration?

1.Thomson and Einstein

2.Hahn and Strassmann

3.Soddy and Fajan

4.Rutherford and Soddy


Question:
Who observed that when the nucleus of uranium atom was bombarded with fast moving neutrons it becomes so very unstable that it is immediately broken into two nuclei of nearly equal mass besides other fragments?

1.Chadwick

2.Einstein

3.Rutherford

4.J.J. Thomson


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