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Class 8 Science Chapter 6 Combustion and Flame MCQ with Answers
CBSE Class 8 - Science - Chapter 8 - Cell Structure and Functions (Q and A). Cell Structure and Functions. Questions and Answers based on NCERT Chapter. Q1: Define Cell. Answer: Cell is the basic structural and functional unit of life.� Q7: Name the scientist who discovered nucleus of the cell? Answer: Robert Brown. Q8: What do we call the single-celled organism? Answer: Unicellular. Q9: Give two examples of single-celled organisms. CBSE Board has brought a major modification in the Exam Pattern and plans to introduce more MCQ Questions with Answers in the Board Exams. Multiple Choice Questions will have considerable weightage in the Board Exams.� When it comes to CBSE Class 10 we have Multiple Choice Questions for Maths, Science, and Social. Get to know the CBSE Objective Type Questions for Classes 6, 7, 8, 9, 10, 11, 12 in PDF Format of all subjects by referring to the further modules. You can download the necessary study material & notes for free of cost by accessing the direct links on our page. MCQ Quiz Questions for CBSE Class 6 to Class If you are preparing for CBSE Board Exams try having a look at the Objective Type Questions existing. Get professionally made Class 8 Science Chapter 6 notes to score good marks in your upcoming exams. Expert teachers at Vedantu aim to offer an in-depth understanding of the topics covered in the chapter. Our objective is to help you excel in the subject without going through a bunch of books at the last minute. Most importantly, our Class 8 Combustion and Flames notes are based on the current CBSE curriculum and syllabus. For your convenience, our notes are available in PDF that can be downloaded from our main website for free. Go, get all the informative content and notes that cover all the t.

These MCQ Questions on Combustion and Flame Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Question 1. Which of the following fuel produces ash on burning: a wood b LPG c petrol d diesel. Question 2. The zone of a flame used by goldsmith for melting gold and silver is: a innermost zone b middle zone c outermost zone d all of these.

Question 3. Can the process of rusting he called combustion? Question 4. Is heat and light produced by Sun a combustion process? Question 5. Heat and light produced in the sun is by: a combustion b nuclear reactions c burning d none of these.

Question 6. Ignition temperature is the: a temperature at which a substance catches fire b highest temperature at which a substance catches fire c lowest temperature at which a substance catches fire d none of these. Question 7. Which of them can be easily burnt with the help of a matchstick?

Question 8. A mgtchstjck does not catch fire on its own at room temperature because its: a ignition temperature is more than room temperature b ignition temperature is less than room temperature c ignition temperature is same as room temperature d none of these.

Question 9. Which of the following gas extinguishes fire: a oxygen b hydrogen c carbon dioxide d nitrogen. Question Combustion that takes place at a very fast rate is called: a rapid combustion b spontaneous combustion c explosion d none of these.

The coldest zone of candle is: a the middle zone b the innermost zone c the outermost zone d none of these. Smoke contains: a unburnt carbon particles b burnt carbon particles c unburnt sulphur particles d unburnt lead particles.

The colour of the non-luminous zone is: a white b yellow c blue d black. Which of the following fuel has the highest calorific value: a cow dung cake b Wood c coal d Petrol. Which of following does not produce flame on burning: a LPG b charcoal c paper d kerosene. Which of the following is best fuel for automobiles: a petrol b CNG c diesel d kerosene. The unit of calorifie virtue is: a kilojoules per kg b joules per kg c kilojoules per grain d joules per gram. The hottest zone of candle fleme is: a outermost zone b in memos zone c middle zone d all of these.

A chemical process in which a substance reacts with oxygen to give off heat is called. Which of the following burns with flame: a coal b cow dung c candle d all of these.

Magnesium burns in air to form a magnesium oxide b heat c light d all of these. Which of the following substance is not combustible: a matchstick b straw c charcoal d glass. In which of the following conditions combustion takes place: a the presence of a combustible substance b the presence of air with sufficient amount of oxygen c the temperature of combustible substance should be more than its ignition temperature d all the above conditions are necessary.

Which of the following is smoke free fuel: a wood b LPG c charcoal d coal. Coal mainly contains: a carbon b nitrogen and Sulphur c carbon, hydrogen and nitrogen d none of these. Which poisonous gas is formed as a result of incomplete combustion? The natural solid fuel is: a coal b charcoal c coke d LPG. Which of the following give us pollution free environment on burning: a wood b kerosene c cow dung cakes d biogas. Unburnt carbon particles in air are dangerous pollutants causing respiratory problems.

Decreased percentage of carbon dioxide in air has been linked to global warming. Burning of wood and coal causes �������� of air. The unit of calorific value of a fuel is ��������. Cement is a �������� substance.

The slow process of conversion of dead vegetation into coal is called ��������. A combustible substance cannot catch fire or bum as long as its temperature is lower than its �������� temperature. The three essential requirements for producing fire are ��������, �������� and ��������.

LPG is �������� �������� ��������. Process of separation of different constituents from petroleum is called ��������. A liquid fuel, used in homes is ��������. Fuel must be heated to its �������� before it starts burning. Fire produced by oil cannot be controlled by ��������. Fuels are stores of energy which of burning give �������� and ��������. The colour of outermost zone is ��������.

The colour of innermost zone of the flame is ��������. Fire brigade uses �������� to extinguish the fire. Incomplete combustion of a fuel gives poisonous �������� gas.

Inflammable substances have very �������� ignition temperature. The substances which burn in air are called ��������.

Conclusion:

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