Something with no adulteration means ……………. substance.
A) pure
B) impulse
C) specific
D) normal
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The final good means, it is …………….. in production of goods.
A) not used further
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______________ means connecting computer to any other computer anywhere in the world.
Correct option is (A) Internet
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German word ‘Trade’ means A) Commerce
correct option is C) Track
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……………. defined an element as any substance that cannot be decomposed into further simple substance by physical or chemical change.
B) Robert Boyle
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Assertion (A) : Air is compound substance. Reason (R) : We can separate air into two or more components only by means of a chemical reaction.
B) A and R are false
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When the particles of a substance contain only one type of atoms, that substance is called a / an
Correct option is B) element
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The molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of the substance.
Correct option is A) 98 U
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A substance is in light yellow colour. If we put it in sunlight, it changes into grey colour. What is the substance ?
C) Silver bromide
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As the night advanced swami felt that something terrible would happen to him what would it be ? How would it happen
When he was in the office-room at night, he remembered all the devil and ghost stories. His friend Mani had seen the devil in the banyan tree, Muniswami’s father spat...
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Discuss in details how components of petroleum can be identified for adulteration
Detection of adulteration in the petroleum fuels (gasoline and diesel) is challenging because the adulterants usually include those compounds which are already present in these fuels. Measurements of various physico-chemical...
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