MEDIUM
Earn 100

Write the chemical equation for the combustion reaction of methane.

Important Questions on Chemical Changes and Reactions

EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
A log of wood attains the ignition temperature _____ than wood shavings do. (Faster/ Slower)
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
The lowest temperature at which a substance catches fire is called its _____ temperature.
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Changing of solids directly into vapour on heating is called _____.
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Fill in the blank with the correct options from the box.
Substances with _____ ignition temperature catch fire easily.
Carbon dioxide Carbon monoxide Ignition temperature Water Low
Kilojoule per kg kJ/kg Nuclear Spontaneous Hotter Blue, yellow
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
The _____ temperature is the minimum temperature at which a substance catches fire.
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
The temperature at which a substance or fuel catches fire is termed as its _____.
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Digestion of food is an example of _____.
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Fuel must be heated to its _____ before it starts burning.
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Wood, paper, CNG are _____ substances.
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Volatile: _____ :: non-volatile : charcoal (silver nitrate / camphor)
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
A substance that can burn in air is called a _____ substance. (combustible/ non-combustible)
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
A fuel that has a very _____ (low/ high) ignition temperature is dangerous to store.
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Petrol, diesel and kerosene are the examples of _____. (non-combustible substances / combustible substances)
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Fill in the blank with the correct options from the box.
Every fuel must be heated to its _____ before it can start burning.
Carbon dioxide Carbon monoxide Ignition temperature Water Low
Kilojoule per kg (kj/kg) Nuclear Spontaneous Hotter Blue, yellow
MEDIUM
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Coal cannot be set on fire with a matchstick because it has a high _____. (calorific value / ignition temperature)
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
SO2 is an _____ oxide.
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
The temperature of the substance should be lowered below the _____ temperature. (room / kindling)
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
Fuel, air and _____ temperature are the necessary requirement for the combustion.
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
A fuel must be heated to its _____ before it starts burning.
EASY
Science>Chemistry>Chemical Changes and Reactions>Combustion and Respiration
An inflammable substance has a low _____ (ignition/ explosion) temperature.