The lowest temperature at which an oil gives sufficient vapours to form an explosive mixture with air is known as -

The lowest temperature at which an oil gives sufficient vapours to form an explosive mixture with air is known as -

(A) Flash Point

(B) Smoke Point

(C) Explosive Point

(D) Acidic Flux


Answer: (A) Flash Point

Explanation: The flashpoint of a liquid is the lowest temperature at which the liquid gives off enough vapour to be ignited (start burning at the surface of the liquid. Sometimes more than one flashpoint is reported for a chemical.

The lowest temperature at which an oil gives sufficient vapours to form an explosive mixture with air is known as -

More Question


Question: Which of the following metals in pure form has the highest melting point?

(A) Tungsten

(B) Copper

(C) Platinum

(D) Gold


Answer


Question: All the mixtures containing a solid and a liquid can be separated by -

I. Centrifugation

II. Evaporation

III. Crystallisation

IV. Chromatography

Correct code is -

(A) Only I

(B) Only II and III

(C) I, II, III and IV

(D) Only III and IV


Answer


Question: Which of the following is not a characteristic of a physical change?

(A) It is a temporary change

(B) It is usually an irreversible change

(C) Very little heat (or light) energy is usually absorbed or given out

(D) The mass of a substance does not alter in a physical change


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Question: Sound cannot travel through -

(A) Solids

(B) Liquids

(C) Gases

(D) Vaccum


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Question: What is the correct ascending order of the following substances in relation to their density (kg/ m(C)?

(A) Aluminium, Iron, Mercury, Gold

(B) Gold, Iron, Aluminium, Mercury

(C) Mercury, Iron, Gold, Aluminium

(D) Iron, Gold, Mercury, Aluminium


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Question: Which of the following metals exists in the liquid state?

(A) Sodium

(B) Mercury

(C) Silver

(D) Chromium


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Question: Which of the following metals is not strong?

(A) Sodium

(B) Gold

(C) Silver

(D) Iron


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Question: The device used for producing electric current is called -

(A) Generator

(B) Galvanometer

(C) Ammeter

(D) Motor


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Question: Sun derives its energy from -

(A) The fusion of hydrogen nuclei into helium nuclei

(B) The fusion of helium nuclei into hydrogen nuclei

(C) The fission of hydrogen nuclei

(D) The fission of helium nuclei


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