Chemical Reactions and Equations

Most of the oxides of metals when react with acid it forms:
1. A base
2. An acid
3. A salt
4. None
Which one of the following is incorrect?
1. Aqueous solutions of acids conduct electricity.
2. Acids react with certain metals to form hydrogen gas
3. Acids turn blue litmus paper red.
4. None of these
Which one of the following is formed when sodium hydrogen carbonate reacts with hydrochloric acid?
1. Sodium chloride
2. Carbon dioxide
3. Water
4. All the above
Which of the following is used as an antacid?
1. Sodium hydrocarbonate
2. Calcium hydroxide
3. Magnesium hydroxide
4. All the above
Which of the following is the pH value of pure water?
1. 0
2. 7
3. 8
4. 1
Which one of the following is true, if a substance has a pH value of 4?
1. The substance is a base
2. The substance is an acid
3. The substance is a neutral substance
4. Either [a] or [b]
Which one of the following is true, if a substance has a pH value of 7?
1. The substance is an acid
2. The substance is a base
3. The substance is a neutral substance
4. Either [a] or [b]
Which one of the following is true, if a substance has a pH value of 8?
1. The substance is an acid
2. The substance is a base
3. The substance is a neutral substance
4. None
Which gas is passed through dry slaked lime to produce bleaching powder?
1. Hydrogen
2. Oxygen
3. chlorine
4. None
A solid element 'X' is a non-metal. It can form
1. an acidic oxide
2. a basic oxide
3. a salt
4. an metallic salt
Identify the acid used in the manufacture of glass.
1. Ascorbic acid
2. Boric acid
3. Phosphoric acid
4. Tartaric acid
Identify the type of product formed in the given chemical equation.
Pb(OH)2+HNO3→Pb(OH)NO3+H2O
1. An acidic salt
2. A basic salt
3. An acid
4. A base
Which of the given substances is used in the following applications?
(i) It is used as a fire proofing material.
(ii) For sealing gaps in laboratory apparatus.
(iii) It is used in making toys.
1. Bleaching powder
2. Plaster of Paris
3. Baking soda
4. Washing soda
_______________ is used for making toys, materials for decoration
and for making surfaces smooth.
1. Bleaching powder
2. Plaster of Paris
3. Baking soda
4. Washing soda
__________________ is used for removing permanent hardness of water.
1. Bleaching powder
2. Plaster of Paris
3. Baking soda
4. Washing soda
_________ is produced by the action of chlorine on dry slaked lime
1. Bleaching powder
2. Plaster of Paris
3. Baking soda
4. Washing soda
The ore is heated until it turns to soda ash, and then it is combined with carbon dioxide to create the____________
1. Bleaching powder
2. Plaster of Paris
3. Baking soda
4. Washing soda
Which of the following is formed by the reaction of an acid with a base?
1. A salt
2. An indicator
3. A Vitamin
4. All of the above
Which ion is commonly found in an acid and a base?
1. H+
2. OH-
3. Cl
4. Both a & b
_____ formed by the combination of hydrochloric acid and sodium hydroxide solution
1. salt
2. acid
3. base
4. None

Chemical Reactions and Equations

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