1.0 atm
0.1 atm
9.0 atm
0.9 atm
Correct answer is B
Partial pressure is found by Dalton's Law:
Px = PTotal ( nx / nTotal )
where
Px = partial pressure of gas x
PTotal = total pressure of all gases
nx = number of moles of gas x
nTotal = number of moles of all gases
Step 1
Find PTotal
Standard pressure is 1 atm.
Step 2
Add up the number of moles of the component gases to find nTotal
nTotal = noxygen + nnitrogen
nTotal = 100 + 900
nTotal =1000cm3
Step 3
Now you have all the information needed to plug the values into the equation and solve for Poxygen
P-oxygen = PTotal ( n-oxygen / nTotal )
oxygen = 1 atm ( 100 / 1000 )
oxygen= 0.1atm
Which of the following acids would form normal salt only?
Tetraoxosulphate(VI) acid
Trioxonitrate(V) acid
Tetraoxophosphate(V) acid
Trioxosulphate(IV) acid
Correct answer is A
Normal salts are formed when all the replaceable hydrogen ions in the acid have been completely replaced by metallic ions
a basic oxide
a reducing agent
an acidic oxide
an oxidizing agent
Correct answer is C
Silicon dioxide is an acidic oxide. It will react with strong bases to form silicate salts, SiO\(_{2}\) is acidic oxide because Si is non-metal. Oxides of non-metals are acidic in nature.
Before a reaction could take place, there should be
ionization of reactant particles
breakage of bonds of products
breakage of bonds of reactants
ionization of product particles
Correct answer is C
Activation energy must be achieved before reaction begin. This is because in any chemical reaction, chemical bonds in the reactants are broken, and new bonds in the products are formed
SO\(_{4}\) \(^{2-}\) ions
SO\(_{3}\) \(^{2-}\) ions
NO\(_{3}\)- ions
SO\(_{3}\) \(^{2-}\)- ions
Correct answer is D
Effervescence is the formation of gas bubbles in a liquid by a chemical reaction. An example of effervescence is the release of carbon dioxide which bubbles as a gas from the liquid when limestone chips, which are composed of calcium carbonate, are added to dilute hydrochloric acid.