Q58 of 87 Page 107

Which of the following is not used in making matchsticks these days?

White phosphorus undergoes spontaneous combustion. Hence it is not used in making matchsticks now days.

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56

Which of the following substance has the lowest ignition temperature?

 57

One of the following is not a combustible substance. This one is:

 59

Which of the following undergoes spontaneous combustion?

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which of the following statement is not correct about carbondioxide acting as a fire extinguisher for electrical fires?