You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/neutral) of each solution.
1 Answers
Talk Doctor Online in Bissoy App
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
On heating the powder, it will char if it is a sugar. Alternatively, the powder may be dissolved in water and checked for its conduction of electricity. If it conducts,...
1 Answers 1 views
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution
(a) Put the red litmus paper turn by turn in each of the three test tubes. The solution which turns the red litmus paper to blue will be a basic...
1 Answers 2 views
A milkman adds a very small amount of baking soda to fresh milk.
(a) Milk is made slightly alkaline so that it may not get sour easily, due to the formation of lactic acid in it. (b) The alkaline milk takes a longer time to set...
1 Answers 1 views
You have three unlabelled test tubes containing ethanol, ethanoic acid and soap solution.
(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...
1 Answers 1 views
Boojho, Paheli and their friend Golu were provided with a test tube each containing China rose solution
‘A’ is an acidic solution. ‘B’ is a basic solution. ‘C’ is a neutral solution.
1 Answers 2 views
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a –
(a) physical change that can be reversed.
1 Answers 1 views
A student adds a few drops of ethanoic acid to test tubes X, Y and Z containing aqueous solutions of sodium chloride,
The correct answer is (D) only Z
1 Answers 1 views
Geeta took three water samples in test tubes A, B and C. She added soap solution to all the three test tubes.
(D) Both A and B are soft water
1 Answers 1 views
You have four test tubes A, B, C and D filled with aqueous solution of same concentration but of different salts.
(b) B and C
1 Answers 1 views
You have three unlabelled test-tubes containing ethanol, ethanoic acid and soap solution.
(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...
1 Answers 1 views