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प्रश्न
A student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it. He observes:
(A) no reaction in the test tube
(B) colourless gas with pungent smell
(C) bubbles of a colourless and odourless gas
(D) white fumes with smell of vinegar
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उत्तर
Acetic acid reacts with Na2CO3 to form sodium acetate, carbon dioxide and water. It is this colourless gas carbon dioxide gas which comes out as bubbles.
The Correct Answer is C
संबंधित प्रश्न
Complete the following chemical equations : C2H5OH`("Conc."H_2SO_4)/(443K)`>
Fill in the blanks from the choices given within brackets:
The basicity of acetic acid is-------- (3, 1, 4).
Give the common name and IUPAC name of C2H5OH.
Complete the following equation:
`CH_3 COOH + CH_2 H_5 OH` 
The structural formula of an ester is :
Write the formula of the acid and the alcohol from which it is formed.
On adding NaHCO3 to acetic acid, a gas is evolved which turns lime water milky due to the formation of:
(1) Calcium bicarbonate
(2) Calcium hydroxide
(3) Calcium carbonate
(4) Calcium acetate
When sodium hydrogen carbonate is added to ethanoic acid, a gas evolves. Consider the following statements about the gas evolved.
- It turns lime water milky.
- It is evolved with brisk effervescence.
- It has a smell of burning sulfur.
- It is also a by-product of respiration.
Bubbles are seen in the test tube during the preparation of lime water.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
Give the balanced chemical equation of the following reaction:
Oxidation of ethanol by acidified potassium dichromate.
