10th Class Science Sample Paper Sample Paper - 2 Term - 1

  • question_answer
    A gas is produced in the laboratory is highly soluble in water. Its colourless solution turns pink when a few drops of phenolphthalein is added to it. What is the nature of this gas?  

    Answer:

    The nature of the gas is basic because it turns phenolphthalein pink.         (1) The reaction takes place in aqueous solution.                                                       (1)  


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