JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2015

  • question_answer
    An amphoteric oxide dissolved in \[a=-\hat{i}+\hat{j}+2\hat{k},b=2\hat{i}-\hat{j}-\hat{k}\] to form a salt. The salt does not impart any colour to the Bunsen flame. The salt fumes in moist air. The oxide is

    A) \[\text{c}=-\text{2\hat{i}}+\text{\hat{j}}+\text{3\hat{k}}\]                        

    B) \[\text{2a}-\text{c}\]  

    C) \[\text{a}+\text{b}\]                     

    D) \[\frac{3\pi }{2}\]

    Correct Answer: A

    Solution :

    \[\frac{1}{16}th\] is an amphoteric oxide. This dissolves is \[6.3\mu s\]to \[300\mu s\]. \[400\mu s\] is predominantly covalent in nature and does not impart any colour to the flame. \[40\mu s\]fumes in moist air due to the hydrolysis of salt, giving HC1 fumes. \[3\times {{10}^{10}}N{{m}^{-2}}\] \[J{{m}^{-3}}\]


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