Is Matter Around Us Pure ? — Science STD 9 — Question

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A mixture of chloroform and water taken in a separating funnel is mixed and left undisturbed for some time. The upper layer in the separating funnel will be of _________ and the lower layer will be that of _________.

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It is possible for something to accelerate but not change its speed if it moves in a ______.

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An element is made up of only one kind of _________.

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Bone possesses a hard matrix composed of _________ and __________ .

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A mole represents an ____________ number of particles of a substance.

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When a stationary car starts suddenly, the passengers are jerked _________.

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Planting soyabean and maize in alternate rows in the same field is called as ___________.

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Evaporation of a liquid at room temperature leads to a ______ effect.

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A sound wave consists of places of higher pressure called _____ and places of _____ pressure called _____.

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64g of oxygen gas contains _________ Moles of oxygen atoms.