2. Which of the following is not a natural adhesive: (a) soybean (b) shellac (c)asphalt (d) UF resin​

Answers 2

Answer:

asphalt is a mixture of sand, aggregate,and bitumen.in asphalt, bitumen is used as a binder to hold together the asphalt, therefore asphalt is a concrete mixture whereas bitumen is binder or cement for pavement

Answer:

(c) Asphalt is not a natural adhesive among the given options.

Explanation:

  • The adhesives made using organic sources namely, vegetable starch, resins obtained from plants, animal-based proteins are known as 'natural adhesives'.
  • Soybean adhesives are made up of soy flour and characteristic crosslinking resin. Therefore, it is considered a natural resource.
  • Shellac is obtained from a product termed gum lac which is in turn obtained from the secretions of an insect (Kerria lacca ) female.  
  • Asphalt often referred to as bitumen, is not a natural adhesive since it is a semi-solid form of petroleum.
  • Urea-formaldehyde resin is obtained from any class of synthetic resins, which are built using natural polymers, combined with urea and formaldehyde.

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Answer:

33 is the correct answer

The answer to the given question is written below.

  • The first option which is '39' is incorrect because it is not mentioned in the UDISE guidelines.
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(ب). غزل اور نظم کے شعر میں بنیادی فرق کیا ہے؟​

Answer:

غزل اور نظم میں فرق:

I Hope it's clear

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