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Chemistry In Action Test - 1
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Chemistry In Action Test - 1
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  • Question 1/8
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    An azo dye is fixed on fabrics by the process applicable in

    Solutions

    In grain or developed dyes are those which are synthesised directly on the fabric e.g. azo dyes. Ingrain dyeing is particularly suitable for cotton fabric.

     

  • Question 2/8
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    Red ink is prepared from

    Solutions

    Eosin is Red dyes.

     

  • Question 3/8
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    The blue print process involves the use of

    Solutions

    The blue print process involve the use of iron compound.

     

  • Question 4/8
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    Alizarin belongs to the class of

    Solutions

    A mordant is any substance which can be fixed to the fibre and which can be dyed later on mostly hydroxide or basic salts of chromium aluminium and iron are used as mordant. A dye which imparts different colours in the presence of different mordant is referred to as a mordant dye. For ex. alizarin is a mordant dye when mordanted with aluminium salt solution. It imparts rose red colour to fabric but the same fabric is dyed blue when it is mordanted with barium salt and it dyes violet is mordant with Ferric salt.

     

  • Question 5/8
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    An insoluble coloured compound formed by action of metallic salts on dyes is known as

    Solutions

    The process is called lake.

     

  • Question 6/8
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    To which class of dyes does phenolphthalein belong

    Solutions

    It belong to phthalein dyes.

     

  • Question 7/8
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    Alizarin a mordant dye is not used in

    Solutions

    It is the mordant dye so not use in painting.

     

  • Question 8/8
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    The rose odour from an ester is formed by the action of HCOOH on

    Solutions

    C10H17OH (Geraniol) a liquid terpene alcohol forms ester of rose odour with HCOOH.

     

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