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question_answer1)
Which of the following substances is non- combustible?
A)
Wood done
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B)
Biogas done
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C)
Kerosene oil done
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D)
A piece of stone done
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question_answer2)
The following table lists some substances as combustible and non-combustible. |
Combustible | Non-combustible |
Wood | Glass |
Magnesium | Charcoal |
Kerosene | Stone |
Which of the following substances is listed incorrectly in the table?
A)
Glass done
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B)
Charcoal done
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C)
Kerosene done
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D)
Magnesium done
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question_answer3)
Rajiv took three substances P, Q, and R and burnt them one by one. He noted down his observations given below. I. Substance P bums quickly producing heat and light. II. Substance Q bums in room temperature on its own. III. Substance R bums with the evolution of heat, light, and sound. Which of the following statements regarding the given information is correct?
A)
Substances P and Q are undergoing rapid combustion whereas R is undergoing explosion. done
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B)
Substances P and R are undergoing spontaneous combustion whereas Q is undergoing rapid combustion. done
clear
C)
Substance P is undergoing rapid combustion, Q is undergoing spontaneous combustion while R is undergoing explosion. done
clear
D)
Substance P is undergoing spontaneous combustion, Q is undergoing rapid combustion while R is undergoing explosion. done
clear
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question_answer4)
Which of the following substances is not required for combustion?
A)
\[{{O}_{2}}\] done
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B)
\[C{{O}_{2}}\] done
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C)
Fuel done
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D)
Heat done
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question_answer5)
The ignition temperatures of four substances, P, Q, R, and S, are \[{{125}^{o}}C\], \[{{270}^{o}}C\], \[{{155}^{o}}C\], and \[{{310}^{o}}C\] respectively. Which of the following pairs of substances catches fire at \[{{250}^{o}}C\]?
A)
Q and S done
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B)
P and R done
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C)
R and S done
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D)
P and Q done
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question_answer6)
The substance that catches fire spontaneously in presence of air, at room temperature, is
A)
White Phosphorous done
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B)
Rhombic Sulphur done
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C)
Calcium done
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D)
Iron done
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question_answer7)
The head of a matchstick contains a mixture of antimony trisulphide, potassium chlorate, starch, and some glue. For combustion, it is struck against a rough surface made of powdered glass and red phosphorus. Which of the following substances will be the first to get ignited when the match is struck against a rough surface?
A)
Antimony trisulphide done
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B)
Potassium chlorate done
clear
C)
Red phosphorus done
clear
D)
Powdered glass done
clear
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question_answer8)
A piece of paper wrapped around an aluminium pipe does not catch fire easily. Which of the following reasons supports the above information?
A)
Paper is non-combustible in nature done
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B)
Aluminium is non-combustible in nature done
clear
C)
Aluminium pipe does not attain its ignition temperature done
clear
D)
Paper wrapped around the pipe does not attain its ignition temperature done
clear
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question_answer9)
The ignition temperature of four substances I, II, III, and IV is \[{{25}^{o}}C\], \[{{35}^{o}}C\], \[{{40}^{o}}C\], and \[{{60}^{o}}C\] respectively. The substances that will catch fire at \[{{36}^{o}}C\] are _____i_____ and ______ii______. The remaining substances can be called _____iii_____ at this temperature. The information in which alternative completes the given statements?
A)
B)
C)
D)
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question_answer10)
The given table lists the ignition temperatures of four fuels W, X, Y, and Z respectively. |
Fuel Ignition | Temperature |
W | \[{{38}^{o}}C\] |
X | \[{{42}^{o}}C\] |
Y | \[{{53}^{o}}C\] |
At \[{{50}^{o}}C\], which of the given fuels is likely to undergo combustion?
A)
Y and Z done
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B)
X and Y done
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C)
Wand X done
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D)
Z and W done
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question_answer11)
The unit of calorific value of a fuel is
A)
\[^{o}C\] done
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B)
L done
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C)
m/s done
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D)
kJ/kg done
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question_answer12)
The given table lists some fuels with their calorific values:
Fuel | Calorific Value |
Diesel | 45000 |
LPG | 55000 |
Petrol | 45000 |
Which of the given fuels is the most efficient?
A)
Petrol done
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B)
Diesel done
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C)
LPG done
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D)
CNG done
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question_answer13)
What is a major cause of global warming?
A)
Gaseous nitrogen oxides released by petrol engines done
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B)
Oxides of sulphur and nitrogen dissolved in rain water done
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C)
Emission of sulphur dioxide on combustion of coal done
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D)
Release of carbon dioxide on combustion of fuels done
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question_answer14)
Which of the following gases is responsible for global warming?
A)
Carbon monoxide done
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B)
Carbon dioxide done
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C)
Nitrogen done
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D)
Ozone done
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question_answer15)
Which of the following fuels is the most efficient?
A)
Coal done
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B)
Wood done
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C)
Biogas done
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D)
Charcoal done
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question_answer16)
Sujit took four different beakers I, II, III, and IV each containing 1 litre water. Also, he took four fuels W, X, Y, and Z. Then, he started heating the water in beakers I, II, III, and IV using 1 kg of each W, X, Y, and Z respectively. He found out that the heat produced by complete combustion of 2 kg of W, 4 kg of X, 1.2 kg of Y, and 3.2 kg of Z is 110000 kJ, 100000 kJ, 72000 kJ, and 12800 kJ respectively. Assume that all the heat released by burning the fuel is absorbed by water. In which beaker does the maximum evaporation take place?
A)
I done
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B)
II done
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C)
III done
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D)
IV done
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question_answer17)
Ravi collected four different types of fuels I, II, in, and IV. He wants to find out which fuel is the most efficient among the fuels he has collected. He bums 1.2 kg of I, 4 kg of II, 3.2 kg of III, and 2.4 kg of IV completely. He found out that the heat produced by complete burning of I, II, III, and IV is 7200 kJ, 32000 kJ, 12800 kJ, and 16800 kJ respectively. From this experiment, he concluded that _i_ is the most efficient fuel and its calorific value is _ii_. The information in which alternative completes the given statement?
A)
i-I, ii-5000 kJ/ kg done
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B)
i-II, ii-8000 kJ/ kg done
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C)
i-II, ii-6000 kJ/ kg done
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D)
i-IV, ii-8000 kJ/ kg done
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question_answer18)
Which of the following faels is the most efficient among the given fuels?
A)
B)
C)
D)
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question_answer19)
The given table lists some of the fuels along with their calorific values and ignition temperatures. |
Fuel | Calorific value (KJ/g) | Ignition temperature\[{{(}^{o}}c)\] |
P | 100 | 5 |
Q | 80 | 50 |
R | 30 | 60 |
S | 20 | 70 |
Which of the following faels is an ideal fuel?
A)
P done
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B)
Q done
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C)
R done
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D)
S done
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question_answer20)
The following figure represents the different zones of a flame.
The information in which alternative correctly represents the different zones of the flame?
A)
B)
C)
D)
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question_answer21)
The given figure represents the various zones of a candle flame.
The information in which alternative correctly labels the given figure?
A)
B)
C)
D)
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question_answer22)
Two friends Gaurav and Samik took two glass plates and two lighted candles. Gaurav held the glass plate inside the flame of the candle and Samik held it slightly above the candle flame. Which of the following statements is correct?
A)
Both Gaurav's and Samik's glass plates will get blackish soot deposition. done
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B)
Neither Samik's nor Gaurav's glass plate will have blackish soot deposition. done
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C)
Gaurav's glass plate will have blackish soot deposition but Samik's glass plate will not. done
clear
D)
Samik's glass plate will have blackish soot deposition but Gaurav's glass plate will not done
clear
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question_answer23)
The given table lists some substances as per their burning tendencies. |
Produce a flame | Do not produce a flame |
Molten wax | Kerosene oil |
Camphor | Charcoal |
Which of the following substances is incorrectly categorized?
A)
Charcoal done
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B)
Camphor done
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C)
Kerosene oil done
clear
D)
Molten wax done
clear
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question_answer24)
Hydrogen is not considered a good fuel because it
A)
Can be liquefied done
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B)
Is limited in nature done
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C)
Has very high calorific value done
clear
D)
Has very high ignition temperature done
clear
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