Ethanoic acid was added to washing soda solution and the gas evolved was tested with a burning splinter.

Number of boxes of soda can Abhis's mother bought = 8 Number of cans each box contain = 24 Total number of cans Abhi's mother bought for party = 24×8=192 So, she bought...

(a) Add a few drops of water in the test tube containing gas. Now, cover the test tube and shake it well. After shaking, test the solution with blue litmus...

(i) 1/2 and (ii) 10

Nature pH Solution (a) (b) (c) (d) (e) Neutral Strongly alkaline Strongly acidic weakly acidic Weakly alkaline 7 11 1 4 9 D C B A E Arrangement of the pH in increasing order of hydrogen ion concentration is as follows: 11 < 9 < 7 < 4 < 1

(a)  Solution Blue Litmus Paper Red Litmus Paper Sodium Metal Ethanol No change No change Hydrogen gas Ethanoic acid Turns red No change Hydrogen gas Soap No change Turns blue Hydrogen gas (b) Hard water contains calcium ions or magnesium ions or both. These ions on reacting with...

Hint: Use both red and blue litmus solutions and predict the colours in each case.

In both cases, the gas evolved is H2. When calcium reacts with water the heat evolved is not sufficient for hydrogen to catch fire. On the other hand, sodium metal...

(B) the ethanoic acid dissolves readily in water  

(i) SOLUTION BLUE LITMUS PAPER RED LITMUS PAPER SODIUM METAL Ethanol No change No change Hydrogen gas Ethanoic acid Turns red No change Hydrogen gas Soap No change Turns blue Hydrogen gas (ii) Hard water contains calcium ions or magnesium ions or both. These ions on reacting...

 Nacl, CaCO3 and NH3