9th Chemistry Glossary Chemistry Terminologies mcqs test

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1. ........the State of an atom where all electrons have the minimum energy .

Ground State

Free State

Plane State

None of them

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2. .......... The Process in which a bigger molecule breaks into two or more simoler Units.

Distillation

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Double bond

Dissociation

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3. .......... The Process in which a bigger molecule breaks into two or more simoler Units.

Electrode

Electrolyte

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Electrolysis

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4. .........the substance dissolved in a solvent to form a Solution ,its quantity in the solution is always laser.

Solution

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Solvent

Solute

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5. ............. The atomic Number of an element is the number of protons in its nucleus.

Atomic Mass Number

Atomic Number

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Atomic Mass Unit

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6. .............. Solids that have indistinct Shapes , because their particle arrangements lack order.

Alloy

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Amorphous Solids

Alpha particles

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7. ............. A substance which can accept a proton , H from an acid

Amphoteric substance

Base

Aufbau principale

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8. ............ The Smallest particle of an element which can take part in chemical reactions and display the chemical properties of that element.

Matter

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Atom

Atomic Mass

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9. ............. Group IIA Elements.

Alkaline Earths

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Alkali Metals

Allotrope

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10. .......,...see Daniel cell.

Gamma rays

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Free Cell

Galvanic Cell

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11. ........... In an electrochemical cell or electrolytic cell, the anode is the electrode where oxidation takes place.

None of them

Anode

Anion

Atmosphere

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12. ...............Water soluble hydroxide of one of the alkali metals.

Acid

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Anode

Alkali

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13. .......... A substance that resists changes in pH when moderate amounts of Acid or base are added.

Catalyst

Calorie

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Buffer

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14. .............the energy liberated when an element acquires an electron to form an anion.

Electron

Electronegativity

Electron affinity

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15. An organic compound containing the CHO group

Amalgam

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Element

Aldehyde

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16. ........... One of the set of seven units on which the SI system is based.

Beta particles

Base

Base Unit

None of them

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17. .........a pure substance that consists of two or more elements chemically combined in fixed proportions .

Concentration

Compound

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Covelant bond

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18. .............the Branch of analytical chemistry that involves identifying , Elements, compounds and ions in samples of unknown or uncertain

Qualitative analysis

Quantative analysis

Quantum analysis

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19. .........a phase change wher by a solid passes directly into the gas phase without melting.

None of them

Suplimation

Sublimation

Solution

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20. ............the outer most shell of electrons .

Vander shell

Vapour shell

Valance shell

None of them

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