2. Questions Bank
  3. 8th Class
  4. Science
  5. Materials : Metals and Non-metals

8th Class Science Materials : Metals and Non-metals Question Bank Metals and Non Metals Summative Subjective Problems

  • question_answer
    \[2X+2Y\xrightarrow{{}}2XOH+{{H}_{2}};\] \[S+{{O}_{2}}\xrightarrow{{}}Z;\,\,Z+Y\xrightarrow{{}}P\] Identify X, Y, Z and P
    X Y Z K
    (a) Na         \[{{H}_{2}}O\]    \[{{S}_{2}}O\]         \[{{H}_{2}}S{{O}_{3}}\]
    (b) K       \[{{H}_{2}}O\] \[{{S}_{2}}O\]    \[{{H}_{2}}S{{O}_{3}}\]
    (c) Na         \[{{H}_{2}}O\]    \[{{S}_{2}}O\] \[{{H}_{2}}S{{O}_{4}}\]
    (d) K       \[{{H}_{2}}O\]    \[{{S}_{2}}O\]    \[{{H}_{2}}S{{O}_{4}}\]

    Answer:

    (a), (b)


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