MCQ
Who discovered neutron
- ✓James Chadwick
- BWilliam Crooks
- CJ.J. Thomson
- DRutherford
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$K + {H_2}O + $Water $ \to KOH(aq) + \frac{1}{2}{H_2};\,\Delta H = - 48\,kcal$
$KOH + $Water $ \to KOH(aq);\,\Delta H = - 14\,kcal$
The heat of formation of $KOH$ is (in kcal)
| List $I$ Element detected | List $II$ Reagent used/Product formed |
| $A$ Nitrogen | $I.$ $Na _2\left[ Fe ( CN )_5 NO \right]$ |
| $B$ Sulphur | $II.$ $AgNO _3$ |
| $C$ Phosphorous | $III.$ $Fe _4\left[ Fe ( CN )_6\right]_3$ |
| $D$ Halogen | $IV.$ $\left( NH _4\right)_2 MoO _4$ |
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