Read and download free pdf of CBSE Class 8 Science Combustion and Flame Assignment Set A. Get printable school Assignments for Class 8 Science. Standard 8 students should practise questions and answers given here for Chapter 6 Combustion And Flame Science in Grade 8 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 8 Science prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations
Assignment for Class 8 Science Chapter 6 Combustion And Flame
Class 8 Science students should refer to the following printable assignment in Pdf for Chapter 6 Combustion And Flame in standard 8. This test paper with questions and answers for Grade 8 Science will be very useful for exams and help you to score good marks
Chapter 6 Combustion And Flame Class 8 Science Assignment
Question. Element showing spontaneous combustion is
(a) Calcium
(b) Phosphorous
(c) Lithium
(d) Copper
Answer : C
Question. Which of the following is/are carbon fuel
(a) Wood
(b) Coal
(c) Petroleum
(d) All of these
Answer : D
Question. Combustion of most fuels releases
(a) CO2
(b) SO2
(c) NO2
(d) Oxygen
Answer : A
Question. Acid rain is caused by oxides of
(a) Sulphur, Nitrogen
(b) Sulphur, Carbon
(c) Carbon, Nitrogen
(d) Phosphorous, Carbon
Answer : A
Question. Which is a solid fuel?
(a) Petrol
(b) Diesel
(c) Wax
(d) Wood
Answer : C
Question. In the sun, heat and light are produced by
(a)Chemical reactions
(b)Nuclear reactions
(c)Ionic reactions
(d)None of these
Answer : B
Question. The head of the safety match contains
(a) Antimony trisulphide
b Potassium Chlorate
(c) Both (a) and (b)
(d) None of these
Answer : C
Question. When the match struck against rubbing surface, red phosphorous
(a) Converts into white phosphorous
(b) Reacts with potassium chlorate
(c) Ignite antimony trisulphide
(d) None of these
Answer : A
Question. Best extinguisher for inflammable Materials is
(a) Water
(b) SO2
(c) CO2
(d) CO
Answer : C
Question. 48 CO2 is stored as a liquid in cylinder at
(a) High pressure
(b) Low pressure
(c) High temperature
(d) Low temperature
Answer : A
Question. Global warming is caused due to____ concentration of Co2 in air
(a) Decreased
(b) Increased
(c) Both (a) & (b)
(d) None of these
Answer : B
Question. Burning of coal and diesel releases
(a) NO2
(b) CO2
(c) SO2
(d) CO
Answer : C
Question.Petrol engine gives off gaseous oxides of
(a) Sulphur
(b) Nitrogen
(c) Phosphorous
(d) Carbon
Answer : B
Question. CO2 is given off by chemicals like
(a) Sodium bicarbonate
(b) Calcium sulphate
(c) Sodium sulphate
(d) Sulphuric acid
Answer : A
Question. Water is not suitable for fire involving
(a) Oil
(b) Petrol
(c) Both (a) & (b)
(d) None of these
Answer : C
Question. Amount of heat energy produced on _____combustion of 1kg of fuel is Calorific value
(a) Incomplete
(b) Complete
(c) Half
(d) None of these
Answer : B
Question. Which is better domestic fuel
(a) CNG
(b) LPG
(c) Wood
(d) Coal
Answer : B
Question. Which of the following has lower ignition temperature?
(a) Wood
(b) Paper
(c) Vegetable oil
(d) Kerosene oil
Answer : D
Question. Which one of the following is non Combustible?
(a) Stone piece
(b) Paper
(c) Straw
(d) Matchsticks
Answer : A
Question. In the presence of water, ignition Temperature of paper is-
(a) Decrease
(b) Increase
(c) Remain constant
(d) None of these
Answer : A
Question. Use of ….. in vehicle reduces pollution
(a) Petrol
(b) Diesel
(c) CNG
(d) None of these
Answer : C
Question. During the process of combustion ________is given out
(a) Heat
(b) Light
(c) Sound
(d) Both heat & light
Answer : D
Question. The most common fire extinguisher is
(a) Water
(b) CO2
(c) Oxygen
(d) Hydrogen
Answer : A
Question. Ideal fuel has ____ calorific value
(a) Low
(b) High
(c) Moderate
(d) Zero
Answer : B
Question. Calorific value gives the
(a) Fuel efficiency
(b) Amount of heat
(c) Amount of light
(d) None of these
Answer : A
Question. Calorific value is measured in
(a) Kilo joule
(b) Kilograms
(c) Kilo joule per Kg
(d) Kilometre
Answer : C
Question. Unburnt carbon particles causes
(a) Stomach infections
(b) Respiratory problems
(c) Brain infections
(d) Throat problems
Answer : B
Question. Yellow colour in the flame denotes
(a) Outermost part
(b) Middle zone
(c) Innermost zone
(d) None of these
Answer : B
Question. Good fuel is
(a) Readily available
(b) Cheap
(c) Burn easily in air
(d) All of these
Answer : D
Question. On burning fuel produces….. amount of heat
(a) Large
(b) Less
(c) Very less
(d) No heat
Answer : A
1.Which is not an example of inflammable substance?
(A) Charcoal. (B) Petrol. (C) Alcohol. (D) LPG.
2.The head of the safety match contains-
(A) antimony trisulphide. (B) potassium chlorate.
(C) Both (a) and (b). (D) None of these.
3.When a frying pan containing cooking oil is kept for long on a burning stove then cooking
oil catches fire because-
(A) Its temperature is lower than its ignition temperature.
(B) Its temperature is reached to its ignition temperature.
(C) Both (a) and (b) are correct.
(D) Neither (a) nor (b).
4.The minimum temperature at which a substance catches fire is-
(A) Melting point. (B) Ignition temperature.
(C) Boiling point. (D) Critical temperature.
5.Which gas is supporter of combustion?
(A) CO2. (B) He. (C) O2. (D) Ne.
6.Find odd one out-
(A) Coal. (B) Glass. (C) Wood. (D) Paper.
7.Pollution can be reduced by using-----in automobiles.
(A) Petrol. (B) Diesel. (C) Kerosene. (D) CNG.
8.Combustion is a -
(A) Physical process (B) Chemical process
(C) Both (a) and (b) (D) None of these
9.Which of the following is not true for water?
(A) Water is the most common fire extinguisher.
(B) Water works only when things like wood and paper are on fire.
(C) Water cannot works for fire involving electrical equipments.
(D) Water is suitable for fires involving oil and petrol.
10.Which substance is used to extinguish fire involving electricity?
(A) Nitrogen. (B) CO2. (C) Water. (D) All.
11.CO2 can be stored in cylinder in-------state at -----pressure.
(A) liquid, high. (B) gas, high. (C) gas, low. (D) liquid, low.
12.Which is not the requirement for burning?
(A) Heat. (B) O2. (C) Fuel. (D) CO2.
13.The combustion of coal dust in coal mines is-
(A) Rapid combustion. (B) Explosion.
(C) Spontaneous combustion. (D) None of these.
Please click the below link to access CBSE Class 8 Science Combustion and Flame Assignment Set A
CBSE Class 8 Science Conservation Of Plants And Animals Assignment Set A |
CBSE Class 8 Science Conservation Of Plants And Animals Assignment Set B |
CBSE Class 8 Science Sound Assignment Set A |
CBSE Class 8 Science Sound Assignment Set B |
CBSE Class 8 Science Sound Assignment Set C |