9th Chemistry Glossary Chemistry Terminologies mcqs test

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1. ............the outer most shell of electrons .

Vander shell

Valance shell

Vapour shell

None of them

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2. ............. 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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3. ............. Group IIA Elements.

Alkali Metals

None of them

Alkaline Earths

Allotrope

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

Amorphous Solids

Alpha particles

None of them

Alloy

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

Electron affinity

None of them

Electron

Electronegativity

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

Dissociation

Distillation

None of them

Double bond

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

Qualitative analysis

None of them

Quantum analysis

Quantative analysis

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

Concentration

Covelant bond

Compound

None of them

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

Atmosphere

Anode

Anion

None of them

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10. ........... 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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11. An organic compound containing the CHO group

Aldehyde

Amalgam

Element

None of them

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

Solution

None of them

Solute

Solvent

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

None of them

Catalyst

Buffer

Calorie

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14. .......,...see Daniel cell.

Free Cell

Galvanic Cell

None of them

Gamma rays

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

Plane State

Ground State

Free State

None of them

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

Electrolyte

Electrode

None of them

Electrolysis

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

Base

None of them

Amphoteric substance

Aufbau principale

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

Acid

Alkali

None of them

Anode

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19. ............ 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

Atomic Mass

Matter

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

Solution

Sublimation

Suplimation

None of them

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