What is the chemical formula for an ionic compound of potassium and oxygen?
KO
K2O
K2O2
KO2
Q.9.
Sodium hydrogen carbonate when added to acetic acid evolves a gas .which of the statement is true about the gas evolved
it turns lime water milky
it burns with a pop sound
it changes the soln colorless
it has a pungent smell
Q.10.
Is the following compound an acid or a base? Ca(OH)2
Acid
Base
Q.11.
How many moles of potassium hydroxide are needed to completely neutralize 0.mol of phosphoric acid? The balanced equation is:H3PO4 + 3KOH --> K3PO4 + 3H2O
0.75 mol
2.25 mol
0.25 mol
0.375 mol
Q.12.
Name this compound: NH4F
Ammonia fluoride
Ammonium fluorite
Ammonia fluorate
Ammonium fluoride
Q.13.
Predict the products for the following reaction:LiOH + H2SO4 -->
LiSO4 + HOH
LiSO4 + H2(OH)
Li2SO4 + HOH
Li2SO4 + H2(OH)
Q.14.
Which of these compounds is ionic?
Carbon dioxide
Dinitrogen Trioxide
Silicon tetrachloride
Lithium bromide
Q.15.
What's the name of the compound NH4NO3 ?
nitrogen hydrogen oxygen
ammonium nitrite
nitrogenous water
ammonium nitrate
Q.16.
Which has a pH below 7?
Acid
Base
Q.17.
NH4+
nitrogen hydride
ammonium
Q.18.
CN-
cyanide
carbon nitride
Q.19.
SO42-
sulfate
sulfite
Q.20.
PO43-
phosphate
phosphorus oxide
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