9th Chemistry Glossary Chemistry Terminologies mcqs test

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

Buffer

Catalyst

None of them

Calorie

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2. An organic compound containing the CHO group

Amalgam

Element

Aldehyde

None of them

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

Dissociation

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Double bond

Distillation

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

Anion

Atmosphere

Anode

None of them

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5. .......,...see Daniel cell.

None of them

Free Cell

Galvanic Cell

Gamma rays

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

None of them

Atomic Number

Atomic Mass Number

Atomic Mass Unit

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

None of them

Ground State

Plane State

Free State

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

Electrolyte

None of them

Electrode

Electrolysis

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

Atom

None of them

Matter

Atomic Mass

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

None of them

Solution

Solvent

Solute

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

None of them

Alloy

Amorphous Solids

Alpha particles

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

Covelant bond

None of them

Concentration

Compound

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14. ............the outer most shell of electrons .

Vander shell

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Valance shell

Vapour shell

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

Electron affinity

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Electron

Electronegativity

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

Quantative analysis

Qualitative analysis

Quantum analysis

None of them

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17. ............. Group IIA Elements.

Alkaline Earths

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Allotrope

Alkali Metals

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

Amphoteric substance

Base

Aufbau principale

None of them

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

Base

Base Unit

None of them

Beta particles

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

Anode

None of them

Alkali

Acid

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