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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
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
A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations, he must note in his note book, about the reaction that takes place. Also write chemical equation foe the reaction.
When you add a few drops of acetic acid to a test-tube containing sodium bicarbonate powder, which one of the following is your observation?
(A) No reaction takes place
(B) A colourless gas with pungent smell is released with brisk effervescence
(C) A brown coloured gas is released with brisk effervescence
(D) Formation of bubbles of a colourless and odourless gas
Give the common names and IUPAC names of the following compounds of CH3COOH.
Give the common name and IUPAC name of C2H5OH.
Draw the structure of butanoic acid.
Write the names of three compounds which can be oxidised directly or in stages to produce acetic acid.
A student takes 2 mL acetic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He makes the following observations:
I. A colourless and odourless gas evolves with a brisk effervescence.
II. The gas turns lime water milky when passed through it.
III. The gas burns with an explosion when a burning splinter is brought near it.
IV. The gas extinguishes the burning splinter that is brought near it.
The correct observations are:
(A) I, II, and III
(B) II, III and IV
(C) III, IV and I
(D) IV, I and II
What is the main constituent of vinegar?
Draw the structural formula of a compound with two carbon atoms in the following case:
An alcohol containing two carbon atoms.
A spatula full of sodium carbonate is taken in a test tube and 2 mL of dilute ethanoic acid is added to it.
Write a chemical equation for the reaction.
