Why do HCL, HNO3, etc., show acidic characters in aqueous solutions
You have two solutions a and B. the pH of solution A is 6
Fresh milk has a pH of 6. How do you think
Incorrect statement about acids is/are
What is the common name of the compound CaOCL2?
What will happen if a solution of sodium hydrogen carbonate is heated?
A Solution turns red litmus blue
Why does an aqueous solution of an acid conduct electricity?
Under what soil condition do you think a farmer would treat the soil of his fields with quicklime
Plaster of paris should be stored in moisture proof containers. Explain why.
Assertion : While dissolving an acid or base in water
Reason : Dissolving an acid on a base in water
Why does dry HCL gas not change the colour of dry litmus paper?
Write word equations and then balanced equations for
Why does distilled water not conduct electricity
Why do not acids show acidic behaviour in the absence of water?
Equal lengths of magnesium ribbons are taken in test tubes A and B
A milkman adds a very small amount of baking soda to fresh milk.
If a few drops of a concerntrated acid accidentally spills over the hand of a student, what should be done?
Metal compound A reacts with dilute hydrochloric acid to produce effervescence
While diluting an acid, why is it recommended that
How is the concentration of hydronium ions
How is the concentration of hydroxide ions (OH-) affected
A solution reacts with crushed egg-shells to give a
Which one of the following types of medicines is
During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calciu..
Why should curd and sour substances not be kept in brass and copper vessels?
10mL of a solution of NaOH is found to be completely neutralised by
Five solutions A, B, C, D and E when tested with universal indicator
Compounds such as alcohols and glucose also contain hydrogen
Assertion : Phenolphthalalein gives pink colour in basic solution
Reason : Phenolphthalalein is a natural indicator
You are having five solutions A,B,C,D and E with pH values as follows:
Which gas is usually liberated when an acid reacts with a metal?
Calcium phosphate is present in tooth enamel. Its nature is
A solution has pH of 7. Explain how would you
Assertion : Sodium hydroxide reacts
Reason : Acids reacts with active metals
(i) Name one natural source of each of the following acids.
(ii) Which ion is commonly produced by all acids?
The pH of a solution is 5.0. Its hydrogen ion concentration is decreased by 100 times, the solution will be:
(i) Define a universal indicator
(ii) Solution A gives pink colour
(iii) Name one salt whose solution has pH
Sodium hydrogen carbonate when added to acetic acid evolves a gas.
What is tooth enamel chemically?
Tooth enamel is one of the hardest substances in our body.
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