The radioactive isotope \[_{27}^{60}Co\] which is used in the treatment of cancer can be made by \[(n,p)\] reaction. For this reaction, the target nucleus is
Two elements A and B form compounds having molecular formulae \[A{{B}_{2}}\] and \[A{{B}_{4'}}\], when dissolved in 20 g of \[{{C}_{6}}{{H}_{6}},1\,\,\,g\,\,A{{B}_{2}}\] lowers the freezing point by 2.3 K whereas 1.0 g of \[A{{B}_{4}}\]lowers it by 1.3 K. The molal depression constant for benzene is \[5.1\text{ }K\text{ }kg\text{ }mo{{l}^{-l}}\] The atomic masses of A and B are, respectively
Energy levels I, II, III of a certain atom correspond to increasing values of energy i.e., \[{{E}_{I}}<{{E}_{II}}<{{E}_{III}}\]If \[{{\lambda }_{1,}}{{\lambda }_{2}}\]and \[{{\lambda }_{3}}\] be the wavelengths of radiations corresponding to the transitions III to II, II to I and III to I respectively, which of the following relations is correct ?
To observe the effect of concentration on the conductivity, electrolytes of different natures were taken into two vessels A and B. A contains weak electrolyte, \[N{{H}_{4}}OH\] and 6 contains KCI. If concentration of each electrolyte was increased then the conductivities of
Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that
A)
Due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air cowards itself. This moisture forms droplets of water and hence, the cloud.
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B)
Concentrated hydrochloric acid emits strongly smelling HCI gas all the time.
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C)
Oxygen in air reacts with the emitted HCI gas to form a cloud of chlorine gas.
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D)
Strong affinity of HCI gas for moisture in air results in forming droplets of liquid solution which appear like a cloudy smoke.
Bottles containing \[{{C}_{6}}{{H}_{5}}I\] and \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}I\] lost their original labels. They were labelled X and Y for testing. X and Y were separately taken in a test tube and boiled with NaOH solution. The end solution in each test tube was made acidic with dilute \[HN{{O}_{3}}\] and then some \[AgN{{O}_{3}}\] solution was added. Substance Y gave a yellow precipitate. Which one of the following statements is true for this experiment?