EASY #2848

The lightest element is

A Helium

B Hydrogen ✓

C Lithium

D Beryllium

ChemistrySciences MDCATMedical

EASY #2834

The atomic number of hydrogen is

A 1 ✓

B 2

C 3

D 4

ChemistrySciences MDCATMedical

EASY #2835

The atomic number of carbon is

A 4

B 6 ✓

C 8

D 12

ChemistrySciences MDCATMedical

EASY #2836

The atomic number of oxygen is

A 6

B 8 ✓

C 10

D 16

ChemistrySciences MDCATMedical

EASY #2837

The periodic table was developed by

A John Dalton

B Antoine Lavoisier

C Dmitri Mendeleev ✓

D Ernest Rutherford

ChemistrySciences MDCATMedical

MEDIUM #2838

The number of elements in the periodic table is

A 100

B 108

C 118 ✓

D 120

ChemistrySciences MDCATMedical

EASY #2839

Acids have a pH value

A Greater than 7

B Equal to 7

C Less than 7 ✓

D Equal to 14

ChemistrySciences MDCATMedical

EASY #2840

Bases have a pH value

A Less than 7

B Equal to 7

C Greater than 7 ✓

D Equal to 0

ChemistrySciences MDCATMedical

EASY #2841

The chemical formula of common salt is

A NaCl ✓

B KCl

C NaOH

D HCl

ChemistrySciences MDCATMedical

EASY #2842

The chemical formula of carbon dioxide is

A CO

B CO₂ ✓

C CH₄

D C₂H₂

ChemistrySciences MDCATMedical

EASY #2843

Rusting of iron is an example of

A Physical change

B Chemical change ✓

C Nuclear change

D Phase change

ChemistrySciences MDCATMedical

MEDIUM #2844

Ionic bonds form between

A Two metals

B Two nonmetals

C Metal and nonmetal ✓

D Two metalloids

ChemistrySciences MDCATMedical

MEDIUM #2845

Covalent bonds form by

A Transfer of electrons

B Sharing of electrons ✓

C Loss of protons

D Gain of protons

ChemistrySciences MDCATMedical

EASY #2846

The process of a liquid turning to gas is

A Freezing

B Condensation

C Evaporation ✓

D Sublimation

ChemistrySciences MDCATMedical

MEDIUM #2847

Sublimation is

A Liquid to gas

B Solid to gas directly ✓

C Gas to liquid

D Liquid to solid

ChemistrySciences MDCATMedical

EASY #1476

The chemical symbol for Iron is?

A Ir

B Io

C Fe ✓

D Fr

ChemistrySciences FederalNTS

EASY #1479

Which acid is found in lemon?

A Acetic acid

B Citric acid ✓

C Lactic acid

D Formic acid

ChemistrySciences FederalNTS

MEDIUM #1416

The process of converting iron into steel is called?

A Galvanization

B Rusting

C Smelting ✓

D Purification

ChemistrySciences PPSCProvincial PSCs

EASY #1417

The chemical name of table salt is?

A Sodium Carbonate

B Sodium Bicarbonate

C Sodium Chloride ✓

D Sodium Hydroxide

ChemistrySciences FederalNTS

EASY #1418

Carbon dioxide is a compound of?

A Carbon and Hydrogen

B Carbon and Nitrogen

C Carbon and Oxygen ✓

D Carbon and Sulphur

ChemistrySciences FederalNTS