A solution turns red litmus blue; its pH is likely to be?

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky.  The solution contains.

10 ml of a solution of NaOH is found to be completely neutralised by 8 ml of a given solution of HCl.  If we take 20 ml of the same solution of NaOH, the amount of HCl solution required to neutralise it will be 

Which one of the following types of medicines is used for treating indigestion?

What happens when a solution of an acid is mixed with a solution of a base in a test tube?

(a) The temperature of the solution increases

(b) The temperature of the solution decreases

(c) The temperatures of the solution remains the same

(d) Salt formation takes place

The pH value of three solutions A, B, and C having equal molar concentration are respectively 2.0, 7.0, and 13.0 at 298 K.  Which of the three solutions represents an acid solution?

(a) Give Arrhenius definition of an acid and a base.
(b) Choose strong acid and strong base from the following:
 \(CH_3COOH,\ NH_4OH,\ KOH,\ HCl\)

Given below are the pH values of four different liquids : 7.0, 14.0, 4.0, 2.0
Which of these could be that of
(i) lemon juice,
(ii) distilled water,
(iii) 1 M sodium hydroxide solution,
(iv) tomato juice

Name the acid present in ant sting.

Why should curd and sour substances not be kept in brass and copper vessels?

Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example, How will you test for the presence of the gas?

What is 'Baking Powder'? How does it make the cake soft and spongy?

What is the colour of litmus in a solution of ammonium hydroxide?

(i) Name the raw materials used in the manufacture of sodium carbonate by Solvay process.

(ii) How is the sodium hydrogen carbonate formed during Solvay process separated from a mixture of \(NH_4Cl\) and \(NaHCO_3\)?

(iii) How is sodium carbonate obtained from sodium hydrogen carbonate?

(a) What is the action on litmus of:

     (i) Dry ammonia gas

     (ii) Solution of ammonia gas in water

(b) State the observations you would make on adding ammonium hydroxide to aqueous solution of:

     (i) Ferrous sulphate

     (ii) Aluminium chloride

Name the acid present in the following:
(i) Tomato, (ii) Vinegar, (iii) Tamarind

A liquid has a pH less than 7 which represent all acidic solution:
(i) State the nature of the solution, if its pH increases from 7 to 14.
(ii) Mention the ion whose concentration increases with the increase in pH value.
(iii) Suggest a method that is generally used for measuring the pH value.

A metal carbonate X on reacting with an acid gives a gas which when passed through a solution Y gives the carbonate back.  On the other hand, a gas G that is obtained at anode during electrolysis of brine is passed on dry Y; it gives a compound Z, used for disinfecting drinking water.  Identity X, Y, G and Z.

(a) Why is sulphuric acid called 'King of Chemicals'?

(b) Describe the three chemical reactions that take place during the conversion of sulphur dioxide to sulphuric acid in the 'Contact Process'.

(c) Why should water be never added drop wise to concentrated sulphuric acid?