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10All combustible substances are organic.
Hydrocarbons contain carbon and oxygen.
Firewood is a non-combustible substance.
Kerosene is used for lighting in villages.
Glass burns in fire.
Charcoal is used to melt metals.
Proteins and fats are inorganic compounds.
Organic compounds are obtained from plants and animals.
Iron is a combustible substance.
Cooking oil contains carbon and hydrogen.
Percentage: 0%
Which substance is combustible?
Hydrocarbons are composed of:
Which is used as fuel in villages without electricity?
Which substance is non-combustible?
Spirit lamps are mainly used in:
Charcoal is used for:
Which is an organic compound?
Combustible substances mainly contain:
Which of the following is obtained from plants or animals?
Which one does NOT burn in fire?
Substances that burn in fire are called ______ substances.
Hydrocarbons are made up of ______ and hydrogen.
Kerosene lamps are used in villages where there is no ______.
Firewood is used to ______ food.
Spirit lamps are used in laboratories as a source of ______.
Charcoal is used to ______ metals.
Substances obtained from plants and animals are called ______ compounds.
All combustible substances consist of ______ and hydrogen.
Proteins, fats and carbohydrates present in the human body are ______ compounds.
Substances that do not burn in fire are called ______-combustible substances.