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

An aqueous solution turns red litmus solution blue.  Excess addition of which of the following solution would reverse the change?

During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride.  The role of calcium chloride taken in the guard tube is to

Calcium phosphate is present in tooth enamel.  Its nature is

Which of the following is not a mineral acid?

Which among the following is not a base?

Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper.  What would be the colour obtained?

Identify the correct representation of reaction occurring during chloralkali process

Why does an aqueous solution of an acid conduct electricity?

Why does dry HCl gas not change the colour of the dry litmus paper?

You have two solutions A and B.  The pH of solution A is 6 and pH of solution B is 8.
(i) Which solution has more H⁺ ion concentration?
(ii) Which solution is acidic and which one is basic?

Why do acids not show acidic behaviour in the absence of water?

Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively.  Which solution is
(i) neutral  
(ii) strongly alkaline    
(iii) strongly acidic   
(iv) weakly acidic
(v) weakly alkaline
Arrange the pH in increasing order of H⁺ion concentration.

What happens when nitric acid is added to egg shell?

Arrange the following in increasing order of their pH values:

NaOH solution, blood, lemon juice.

Explain why an aqueous solution of sodium sulphate IS neutral while an aqueous of sodium carbonate is basic in nature.

Give chemical equation to show the changes that occur when green coloured ferrous sulphate crystals are heated. Mention the change observed as well as the reason for this change.

A green coloured hydrated metallic salt on heating loses its water of crystallisation and gives the smell of burning sulphur. Identify the salt and write down the reaction involved

State the chemical name of Plaster of Paris.Write a chemical equation to show the reaction between Plaster of Paris and water.

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

(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 aicd in the 'Contact Process'.

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

(i) Define universal indicator. For what purpose it is used?
(ii) Two solutions A and B have pH values of 3.0 and 9.5 respectively. Which of these will turn litmus solution from blue to red and which will turn phenolphthalein from colourless to pink?
(iii) Water is a neutral substance. What colour will you get when you add a few drops of the universal indicator to a test tube containing distilled water?