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प्रश्न
A student is studying the properties of acetic acid. List two physical properties of acetic acid he observes. What happens when he adds a pinch of sodium hydrogen carbonate to this acid? Write any two observations.
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उत्तर
Physical properties of acetic acid:
a) It freezes during winters, as its melting point is 290 K.
b) It has a characteristic vinegar-like odour.
When a pinch of sodium hydrogen carbonate is added to acetic acid in a test tube, a brisk effervescence is observed due to evolution of a colourless and odourless carbon dioxide gas, CO2.
Chemical equations for the reaction:
CH3COOH(aq) + NaHCO3(s) → CH3COONa(aq) + H2O(l) + CO2(g)
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संबंधित प्रश्न
A student takes about 6 ml of distilled water in each of the four test tubes P, Q, R and S. He then dissolves an equal amount of four different salts namely, sodium chloride in 'P', potassium chloride in 'Q', calcium chloride in 'R' and magnesium chloride in 'S'. Next, he then adds 10 drops of soap solution to each test tube and shakes its contents. The test tubes in which scum (insoluble substance) is formed with soap are:
(A) P and Q
(B) Q and R
(C) R and S
(D) Q and S
Complete the following chemical equations :CH3COOH + Na2CO3 →
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.
Consider the following organic compound:
CH3OH, C2H5OH, CH3COCH3, CH3COOH, C2H5COOH, C4H9COOC2H5, CH4, C2H6, CH3CHO, HCHO
Out of these compound:
Which compound is a constituent of vinegar?(e) Which compound is a constituent of vinegar?
Fill in the blank with appropriate word/words.
Denatured alcohol is a mixture of _____ and _______
Draw the structural diagram of:
Ethanoic acid
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:
Neutralization of NaOH with ethanoic acid.
