(a) What are organic acids and mineral acids ? (b) Give two examples each of organic acids and mineral acids.

(i) Hydrochloric acid(HCl),nitric acid(HNO3)  (ii) Carbonic acid (H2CO3),oxalic acid(C2H2O4)

(a) (i) Herbivores – Those animals which eat only plants are called herbivores. Example: Goat and cow.  (ii) Carnivores – Those animals which eat only other animals as food are called...

(a) There are 5 sense organs: Eyes, ears, nose, tongue and skin.   (b) A receptor is a cell (or a group of cells) in a sense organ which is sensitive to...

(a) Citric acid – Lemon. (b) Oxalic acid – Tomatoes. (c) Lactic acid – Sour milk or curd. (d) Tartaric acid – Tamarind.

A strong acid is one that completely ionises in water to form a large amount of hydrogen ions whereas a weak acid only partially ionises in water and thus produces...

Acidic salt: Acid salts are formed by the partial replacement of the ionizable hydrogen atoms of a polybasic acid by a metal or an ammonium ion. Normal salt: Normal salts are...

(a) Efflorescence is the property of some substances to lose wholly, or partly their water of crystallization when their crystals are exposed to dry air even for a short time. Examples...

Differences: Food crops 1. These are crops which are grown for food such as cereals: wheat, rice, maize,pulses, oil seeds. 2. These grow in the plains generally. 3. These are annuals and complete their...

Brazil has one of the world’s largest deposits of iron ore and also has some coal and vast oil reserves. Lake Maracaibo in Venezuela has rich deposits of mineral oil....

The two main types of matter are : 1. Living matter: The earth is home to all kinds of plants and animals. They can grow, move and reproduce on their own....