EASY #2848

The lightest element is

A Helium

B Hydrogen ✓

C Lithium

D Beryllium

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 #2846

The process of a liquid turning to gas is

A Freezing

B Condensation

C Evaporation ✓

D Sublimation

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

MEDIUM #2844

Ionic bonds form between

A Two metals

B Two nonmetals

C Metal and nonmetal ✓

D Two metalloids

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

EASY #2842

The chemical formula of carbon dioxide is

A CO

B CO₂ ✓

C CH₄

D C₂H₂

ChemistrySciences MDCATMedical

EASY #2841

The chemical formula of common salt is

A NaCl ✓

B KCl

C NaOH

D HCl

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 #2839

Acids have a pH value

A Greater than 7

B Equal to 7

C Less than 7 ✓

D Equal to 14

ChemistrySciences MDCATMedical

MEDIUM #2838

The number of elements in the periodic table is

A 100

B 108

C 118 ✓

D 120

ChemistrySciences MDCATMedical

EASY #2837

The periodic table was developed by

A John Dalton

B Antoine Lavoisier

C Dmitri Mendeleev ✓

D Ernest Rutherford

ChemistrySciences MDCATMedical

EASY #2836

The atomic number of oxygen is

A 6

B 8 ✓

C 10

D 16

ChemistrySciences MDCATMedical

EASY #2835

The atomic number of carbon is

A 4

B 6 ✓

C 8

D 12

ChemistrySciences MDCATMedical

EASY #2834

The atomic number of hydrogen is

A 1 ✓

B 2

C 3

D 4

ChemistrySciences MDCATMedical

MEDIUM #2833

IPv6 addresses have how many bits?

A 32

B 64

C 96

D 128 ✓

Computer ScienceNetworking FederalFPSC

MEDIUM #2832

IPv4 addresses have how many bits?

A 16

B 32 ✓

C 64

D 128

Computer ScienceNetworking FederalFPSC

MEDIUM #2831

Encryption is the process of

A Compressing files

B Deleting files

C Converting data into a coded form ✓

D Backing up data

Computer ScienceNetworking FederalFPSC

EASY #2830

Malware is

A Useful software

B Anti-virus software

C Malicious software ✓

D System software

Basic IT & MS OfficeComputer Science FederalNTS

EASY #2829

What does 'www' stand for in a website address?

A World Wide Web ✓

B World Wireless Web

C Wide World Website

D World Web Work

Basic IT & MS OfficeComputer Science FederalNTS