Chemistry sample exam Flashcards
(16 cards)
1 mole of water contains 2 moles of…
hydrogen atoms
What is the unit of the molar volume of a given compound (i.e. gases)…
dm3/mol
The intermolecular forces between hydrogen molecules are…
dispersion (London) forces
How can you shift the equilibrium of N2 + 3 H2 2 NH2 reaction to right?
Increase pressure
Reduction is:
gain electron(s)
Potassium chloride is dissolved in water. The solution becomes…
neutral as this salt does not react with water
Which one is wrong? Define the mass-concentration of a given solution
trans-1,1-dibromoethan
Which one is the most basic compound in its dilute aqueous solution?
Diethylamine
Which is same for enantiomeric pairs
- Melting point
- Boiling point
- Density
- Solubility in water
Which polymer is build up of only carbohydrates?
Cellulose
How can you detect specifically the primary amino group in the molecule? With
Sodium nitrite/hydrochloric acid
Which one is correct? Peptides/proteins (are)
hydrolyse under very harsh conditions
Which one is wrong? Catechol
forms water soluble salt with HCl
Which compound in row are all give the positive Tollens test (i.e. silver-mirrir test)?
formic acid, proptonaldehyde, fructose
Which one is non-reducing disaccharide?
Sucrose
The positive result of a Fehling test is the appearance of a heavy, red precipitate of
Cu2O
