9th Chemistry Glossary Chemistry Terminologies mcqs test -

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

Sublimation

Solution

None of them

Suplimation

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2. ............the outer most shell of electrons .

Vander shell

Vapour shell

None of them

Valance shell

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

Amphoteric substance

Aufbau principale

Base

None of them

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

None of them

Electronegativity

Electron

Electron affinity

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

Dissociation

None of them

Distillation

Double bond

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

Calorie

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Catalyst

Buffer

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

Atomic Number

Atomic Mass Number

Atomic Mass Unit

None of them

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

Solute

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Solution

Solvent

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9. An organic compound containing the CHO group

Element

None of them

Amalgam

Aldehyde

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

Alpha particles

Alloy

None of them

Amorphous Solids

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

Alkali

Acid

None of them

Anode

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13. ............. Group IIA Elements.

Alkali Metals

Alkaline Earths

None of them

Allotrope

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

None of them

Quantum analysis

Quantative analysis

Qualitative analysis

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

None of them

Atomic Mass

Matter

Atom

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

None of them

Beta particles

Base Unit

Base

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

Electrolysis

None of them

Electrode

Electrolyte

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19. .......,...see Daniel cell.

Gamma rays

None of them

Galvanic Cell

Free Cell

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

Anion

Anode

None of them

Atmosphere

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