Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

Class 12 Chemistry 35 Years JEE Mains &Advance Past yr Paper

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The document Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev is a part of the JEE Course Class 12 Chemistry 35 Years JEE Mains &Advance Past yr Paper.
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1. An element Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev  undergoes an α-emission followed by two successive β-emissions. The element formed is ............. .           (1982 - 1 Mark)

Ans:    Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

Solutions : 
TIPS/Formulae :

When an element emits α -particle atomic mass decreases by four and atomic number decreases by two. Loss of β - particle results in increase in atomic number by 1 and no
change in atomic mass.
Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

 

2. The rate of chemical change is directly proportional to ............... . (1985 - 1 Mark)

Ans:  Product of active masses of reactants at that temperature

Solutions : 
 Product of active masses of reactants at that time

3. The number of neutrons in the parent nucleus which gives Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev on beta emission is ............... . (1985 - 1 Mark)

Ans:  8

Solutions :  Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

 

4. The hydrolysis of ethyl acetate in ............... medium is a ............... order reaction. (1986 - 1 Mark)

Ans:  acidic, first (or basic, second)

 

5. A radioactive nucleus decays emitting one alpha and two beta particles; the daughter nucleus is ............... of the parent. (1989 - 1 Mark)

Ans:   isotope

Solutions :  Isotope; (because new atom has same atomic number but different atomic mass).

 

6. For the reaction N2 (g) + 3H2 (g) → 2NH3 (g), under certain conditions of temperature and partial pressure of the reactants, the rate of formation of NH3 is 0.001 kg h–1. The rate of conversion of H2 under the same condition is........kg h–1.

Ans:  1.765 × 10–4 kg/hr

Solutions : N2(g) + 3H2(g) —→ 2NH3(g)
Here Rate of reaction = 1/3 [Rate of disappearance of H2] = 1/2 [Rate of appearance of NH3]
  Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

 = 1.765 × 10–4 kg/hr.

7. In the Arrhenius equation, Fill Ups of Chemical Kinetics and Nuclear Chemistry, Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev A may be termed as the rate constant at .............. . (1997 - 1 Mark)

Ans:   very high temperature or zero activation energy

Solutions : very high temperature (T=∞) or zero activation energy

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