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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Ethanoic Acid Has a Pungent Odour. - Science and Technology 2

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प्रश्न

Ethanoic acid has a .................... odour.
(a) Rotten eggs
(b) Pungent
(c) Vinegar-like
(d) Mild

उत्तर

(b) Pungent
Ethanoic acid has a pungent odour.

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2015-2016 (March)

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संबंधित प्रश्‍न

The molecular formula of acetic acid is _________ .
(a) CH3COOH
(b) CH3 – CH3
(c) C6H6
(d) C2H4


What do you observe when you drop a few drops of acetic acid to test tubes containing

(a) phenolphthalein

(b) distilled water

(c) universal indicator

(d) sodium hydrogen carbonate powder


A student adds a few drops of ethanoic acid to test tubes X, Y and Z containing aqueous solutions of sodium chloride, sodium hydroxide and sodium carbonate, respectively. If he now brings a burning splinter near the mouth of the test tubes immediately after adding ethanoic acid in each one of them, in which of the test tube or test tubes the flame will be extinguished?

(A) X and Y

(B) Y and Z

(C) X and Z

(D) only Z


Give balanced chemical equations for Sodium ethanoate to methane.


Draw the structures for the following compounds of Propanoic acid.


Write the formulae of methanoic acid.


Complete the following equation:

`CH_3 COOH + CH_2 H_5 OH` 


An organic compound A (molecular formula C2H4O2) reacts with Na metal to form a compound B and evolves a gas which burns with a pop sound. Compound A on treatment with an alcohol C in the presence of a little of concentrated sulphuric acid forms a sweet-smelling compound D (molecular formula C3H6O2). Compound D on treatment with NaOH solution gives back B and C. Identify A, B, C and 


What is glacial acetic acid ?


What do you notice when acetic acid reacts with alcohol?


Name the functional group present in the following compound:
HCOOH


Explain the following term with example.

Reduction


Explain the following term with an example.

Oxidant


Under what conditions does ethane get converted to ethyl alcohol?


What is thr boilng point of acetic acid?


Give balanced chemical equations for the following conversion :

Ethanoic acid to ethyl ethanote


A compound X when treated with an organic acid Y (having vinegar-like smell) in the presence of the acid Z, forms a compound P which has a fruity smell.

  1. Identify X, Y, and Z
  2. Write the structural formula of X and Y.
  3. What type of compound P is?
  4. Name the above reaction.
  5. If compound X and Y both have 2 carbon atoms. Write the reaction.

Choose the correct option from given alternative:
When sodium hydrogen carbonate is added to ethanoic acid a gas evolves. Consider the following statements about the gas evolved?
(A) It turns lime water milky.
(B) It is evolved with brisk effervescence.
(C) It has a smell of burning sulfur.
(D) It is also a by-product of respiration.


Which of the following substance produces brisk effervescence with baking soda solution?


Give the balanced chemical equation of the following reaction:

Neutralization of NaOH with ethanoic acid.


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