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Cell membrane is

A. permeable

B. semipermeable

C. selectively permeable

D. impermeable

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  2. Glass is made from the mixture of
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  4. One fathom is equal to
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  6. Nitrification means
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  20. The property of a substance to absorb moisture from the air on exposure is called
  21. Water has maximum density at
  22. The oxide of Nitrogen used in medicine as anaesthetic is
  23. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  24. The element present in the largest amount in rocks and minerals is
  25. Polythene is industrially prepared by the polymerisation of
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  27. The most important ore of Aluminium is
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