9th Chemistry Glossary Chemistry Terminologies mcqs test

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

Concentration

None of them

Compound

Covelant bond

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

None of them

Dissociation

Distillation

Double bond

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

Calorie

Buffer

Catalyst

None of them

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

Solution

Solute

Solvent

None of them

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

Quantative analysis

Quantum analysis

None of them

Qualitative analysis

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

None of them

Electrolyte

Electrolysis

Electrode

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

Anion

None of them

Anode

Atmosphere

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

None of them

Atomic Mass Unit

Atomic Number

Atomic Mass Number

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10. An organic compound containing the CHO group

None of them

Element

Aldehyde

Amalgam

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

None of them

Matter

Atom

Atomic Mass

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

None of them

Free State

Ground State

Plane State

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

Alpha particles

None of them

Alloy

Amorphous Solids

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

None of them

Electronegativity

Electron

Electron affinity

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15. ............the outer most shell of electrons .

None of them

Vander shell

Vapour shell

Valance shell

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

Aufbau principale

Amphoteric substance

None of them

Base

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

Suplimation

Sublimation

None of them

Solution

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18. ............. Group IIA Elements.

Allotrope

Alkaline Earths

None of them

Alkali Metals

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

None of them

Anode

Alkali

Acid

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20. .......,...see Daniel cell.

Free Cell

None of them

Galvanic Cell

Gamma rays

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