7
Curiosity
Atoms and Molecules
250+ practice questions available
Sample Practice Questions
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1
Easy
John Dalton presented his atomic theory in the year:
A1766
B1793
C1808
D1961
2
Hard
Match the following: (i) Au (ii) Ag (iii) Pb (iv) Cu. The correct order of elements is:
AGold, Silver, Lead, Copper
BSilver, Gold, Copper, Lead
CGold, Copper, Lead, Silver
DLead, Silver, Gold, Copper
3
Medium
The formula of carbon tetrachloride is:
ACCl₂
BCCl₃
CCCl₄
DC₄Cl
4
Easy
The valency of hydrogen is:
A1
B2
C3
D0
5
Medium
The mass of 5 moles of sodium is: (Na = 23u)
A23 g
B46 g
C115 g
D230 g
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