In a flame, lithium compounds turn it .......
Lilac
Green
Yellow
Crimson
Red
In a flame, Sodium compounds turn it .......
In a flame, potassium compounds turn it ....
In a flame, calcium compounds turn it...
In a flame, barium compounds turn it .....
How can Halide ions be tested?
Flame test
With Sodium Hydroxide
Bromine Test
With Silver Nitrate
Silver Chloride is a ........ precipitate.
White
Cream
Pale yellow
Silver Bromide is a ...... precipitate
Silver Iodide is a .......... precipitate.
One can test for aluminium ions, calcium ions and magnesium ions with ......
A flame test
Bromine wate
Sodium hydroxide
Silver nitrate
Aluminium, calcium and magnesium ions form ......... precipitates with sodium hydroxide solution
blue
white
green
cream
Copper (2), iron (2) and iron (3) ions can be tested ....
with sodium hydroxide solution
with a flame test
in bromine water
with silver nitrate
In excess sodium hydroxide solution, copper (2) ions form ......... precipitates.
brown
In excess sodium hydroxide solution, iron (2) ions form ....... precipitates.
In excess sodium hydroxide solution, iron (3) ions form ....... precipitates.
During the Haber Process, hydrogen & nitrogen react together in these conditions:
400 degrees c
350 degrees c
450 degrees c
200 atmospheres
150 atmospheres
350 atmospheres
with a nickel catalyst
with a copper catalyst
with an iron catalyst
In a reversible reaction when the temperature is increased the yield from the ........
endothermic reaction increases and the yield from the exothermic decreases
endothermic reaction decreases and the yield from the exothermic increases
In a reversible reaction when the temperature is decreased the yield from the ........
endothermic reaction increases and the yield from the exothermic reaction decreases.
endothermic reaction decreases and the yield from the exothermic reaction increases.
Group 1 metals react with water, releasing
carbon dioxide
oxygen
hydrogen
Group 1 metals, form .......... that dissolve in water to give ........... solutions
carbonates
acids
hydroxides
acidic
alkaline
In gaseous reactions, an increase in pressure favours the reaction that produces the ..... number of molecules
least
most
Alcohols react sodium to produce .....
sodium chlroide
Carboxylic acids are part of the ..... molecular group.
(-OH)
(-COO-)
(-COOH)
Carboxylic acids, react with alcohols in the presence of an ........ catalyst to produce .............
acid
nickel
esters
a stronger acid
a weaker acid
Esters are part of the ..... molecular group
Newlands, and then Mendeleev, attempted to classify the elements by arranging them in order of their
atomic weights
atomic structure
atomic numbers
when electrons, protons and neutrons were discovered early in the 20th century, the periodic table was then arranged in order of
Atomic mass
Atomic structure
Atomic numbers
In Group 1, the more easily electrons are lost, the ........... number of shells
higher
lower
same
The less easily electrons are gained therefore the ........ number of shells is more reactive
What may be added to drinking water to reduce microbes and fluorides?
Oxygen
Chlorine
Weak acids
Iodine
Bromine
Is bond breaking exothermic or endothermic?
Endothermic
Exothermic
Both
Is bond formation exothermic or endothermic?
