Chemistry 9 Chapter 1 Practice Test 2

ByMuhammad Zaman

Chemistry 9 Chapter 1 Practice Test 2

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435

Class 9 Chemistry

Chapter 1

Branches of Chemistry

Practice MCQs Test 2

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Element radium decays by emitting α-particles and is converted into another element radon.

2 / 16

Haber’s process converts large quantities of hydrogen and nitrogen into ammonia (NH3 ).

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White lead is a pigment used by artists for centuries, the metal Pb in the compound is extracted from its ore, galena (PbS).

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Ammonia is a colourless gas with a pungent irritating odour. It is highly soluble in water.

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Acetylene is the simplest hydrocarbon that contains a carbon-carbon triple bond. Hydrocarbons are the compounds of carbon and hydrogen.

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Some examples of complete protein food are meat, milk, and eggs.

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Gases can be compressed by applying pressure.

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Calorimeter is a device that measures the amount of heat, a substance absorbs on heating or emits on cooling.

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A chemist performed an experiment to check the percentage purity of a sample of glucose (C6 H12 O6).

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α-particles (He++) when bombard on nitrogen atom, a proton is emitted.

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Hair contain a special class of proteins called keratins, which are present in nails and wool. Proteins contain chains of C-atoms.

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Plantation helps in overcoming the greenhouse effect.

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Chlorofluorocarbon compounds are responsible for the depletion of ozone layer.

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An analyst determines that NO2 is responsible for acid rain.

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Sulphuric acid (H2 SO4) is extremely corrosive to skin.

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Photosynthesis produces glucose and oxygen from carbon dioxide and water in presence of chlorophyll and sunlight.

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