1

IIT-JEE 2012 Paper 1 Offline

Numerical

+3

-0

The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in the periodic table?

$${}_{29}^{63}Cu$$ + $${}_1^1H$$ $$\to$$ $$6{}_0^1n$$ + $${}_2^4\alpha $$ + 2$${}_1^1H$$ + X

$${}_{29}^{63}Cu$$ + $${}_1^1H$$ $$\to$$ $$6{}_0^1n$$ + $${}_2^4\alpha $$ + 2$${}_1^1H$$ + X

Your input ____

2

IIT-JEE 2012 Paper 1 Offline

Numerical

+3

-0

An organic compound undergoes first-order decomposition. The time taken for its decomposition to 1/8 and 1/10 of its initial concentration are t

_{1/8}and t_{1/10}respectively. What is the value of $$\left[ {{{{t_{1/8}}} \over {{t_{1/10}}}}} \right] \times 10$$? ($${\log _{10}}2 = 0.3$$)Your input ____

3

IIT-JEE 2010 Paper 1 Offline

Numerical

+3

-0

The concentration of R in the reaction R $$\to$$ P was measured as a function of time and the following data is obtained

The order of reaction is

[R] molar | 1.0 | 0.75 | 0.40 | 0.10 |
---|---|---|---|---|

t (min.) | 0.0 | 0.05 | 0.12 | 0.18 |

Your input ____

4

IIT-JEE 2010 Paper 1 Offline

Numerical

+3

-0

The number of neutrons emitted when $${}_{92}^{235}U$$ undergoes controlled nuclear fission to $${}_{54}^{142}Xe$$ and $${}_{38}^{90}Sr$$ is

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Questions Asked from Chemical Kinetics and Nuclear Chemistry (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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