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Acid-Base Equilibrium
Atomic Structure And Related Patterns In The Periodic Table
Bonding And Structure, And Intermolecular Forces
Chemical Equilibrium
D-Block Elements (Transition Elements)
DESCRIPTIVE INORGANIC CHEMISTRY: Group IV (14)
DESCRIPTIVE INORGANIC CHEMISTRY: Halogens (GROUP VII or 17)
DESCRIPTIVE INORGANIC CHEMISTRY: Modern Periodic Table, Periodicity And S-Block Elements
Functional Group Chemistry And Reaction Mechanism
ORGANIC CHEMISTRY: Fundamentals
Raoult’s Law And Phase Equilibria
Reaction Kinetics
Redox Equilibrium
The Mole Concept

5/64 MCQs for:

The Mole Concept

In the titration of aqueous sodium hydroxide and oxalic acid (ethanedioic acid), the indicator used in this titration is:

Phenolphthalein.

Oxalic acid is self-indicating.

Methyl orange.

K₂CrO₄.

In the titration of aqueous sodium hydroxide and oxalic acid (ethanedioic acid). The apparatus in which the NaOH solution is to be put in during titration is called?

Round-bottomed flask

Volumetric flask

Pipette

Conical flask

In order to determine the molecular formula of a certain hydrocarbon at SONARA in Limbe, 10.0cm³ of the hydrocarbon was exploded with 100cm³ of oxygen. The total volume after the explosion was 75cm³ which decreased to 25.0cm³ on shaking the gaseous mixture with aqueous sodium hydroxide.

The molecular formula of the hydrocarbon is:

C₅H₈.

C₄H₁₀.

C₅H₁₂.

C₅H₁₀.

1.60 g of a metallic oxide of type MO was dissolved in 100 cm³ of 1M HCl. The resulting liquid was made up to 500 cm³ with distilled water. 25.0 cm³ of the analyt required 21.02 cm³ of 0.1020 M NaOH for neutralisation. The relative atomic mass of the metal, M is:

40.

40 g mol⁻¹.

56.

56 g.

How many moles of sodium atoms are there in 2.3 g of sodium metal?

0.1 mol

1 mol

0.01 mol

0.2 mol