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Chemistry > Deck 20 (381 - 400) > Flashcards

Deck 20 (381 - 400) Flashcards

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1
Q
  1. The strongest bases are hydroxides of:

a. halogens
b. transition metals
c. noble gases
d. group 1 and group 2

A

group 1 and group 2

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2
Q
  1. Give the name to the product of dehydrogenation of propane
A

propene

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3
Q
  1. Write the formula for potassium permanganate
A

KMnO4

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4
Q
  1. PIC
A
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5
Q
  1. The substance that enters a chemical reaction is called a..
A

reactant

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6
Q
  1. Complete the equation:

CH3-CH2-COOH + NH4OH -> ???

A

CH3-CH2-COOH + NH4OH -> CH3-CH2-COONH4 + H2O

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7
Q
  1. PIC
A
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8
Q
  1. Give the corresponding name to the symbol Pb
A

lead

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9
Q
  1. PIC
A
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10
Q
  1. Which of the following pairs is not a conjugate acid-base pair ?

a. H2O and OH-
b. HNO3 and NO3-
c. H3O+ and OH-
d. HCl and Cl-

A

H3O+ and OH-

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11
Q
  1. The formation of proteins, starches and fats from their subunits occurs by a process known as
A

dehydration

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12
Q
  1. Orange juice is a:

a. homogenous mixture
b. heterogenous mixture
c. unsaturated solution
d. compound

A

heterogenous mixture

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13
Q
  1. Lecithin is a:

a. sugar
b. wax
c. amino acid
d. phospholipid

A

phospholipid

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14
Q
  1. The neutralisation of any strong acid and strong base produces mostly ?
A

H2O molecules

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15
Q
  1. The solvent in a vinegar is:

a. wine
b. water
c. acetic acid
d. salt

A

water

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16
Q
  1. 80 g of NaOH is dissolved 2000 ml of solution. Calculate the molar concentration of solution.
    Mm(NaOH) = 40 g.mol-1

a. 40 mol.dm-3
b. 82 mol.dm-3
c. 160 mol.dm-3
d. 1 mol.dm-3

A

1 mol.dm-3

17
Q
  1. The structure below is a(n):

R-NH-R

A

amine

18
Q
  1. Which of the following quantum numbers describes a “p” orbital in the third energy level ?

a. n = 3, l = 0, m = 0
b. n = 3, l = 1, m = 0
c. n = 3, l = -1, m = 0
d. n = 4, l = 3, m = 0

A

n = 3, l = 1, m = 0

19
Q
  1. Name the process that converts oils to fats
A

hydrogenation

20
Q
  1. How many protons and electrons respectively are in Cl- (Z = 17) ?

a. 18, 17
b. 17, 18
c. 17, 16
d. 16, 17

A

17, 18

21
Q
A

Chemistry (25 decks)

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