SAT Chemistry - Acids, Bases and Salts
Exam Duration: 45 Mins Total Questions : 30
Arrange the following compounds in increasing order of pH values.
i) Human blood
ii) 1 M HCl
iii) 1 M NaOH
iv) Lemon juice
v) Soft drinks
- (a)
ii< iv < v < i < iii
- (b)
iii < i < v < iv < ii
- (c)
ii < v < iv < i < iii
- (d)
ii < i < v < iv < iii
A metal carbonate (X) on thermal decomposition produces a solid residue and a gas (Y). When (Y) is passed through aqueons solution of another substance (Z) gives
back X. The compounds X, Y and Z respectively are
- (a)
Ca(OH)2, CaC03, CO2
- (b)
Ca(HCO3)2, Ca(OH)2,CaCO3
- (c)
CaCO3,CO2,Ca(OH)2
- (d)
CaCO3, CO2,Ca(HCO3)2
Aqueous solutions of which of the following oxides are basic in nature?
i) CaO
ii) MgO
iii) SO2
iv) CO2
- (a)
ii only
- (b)
i and ii
- (c)
iii only
- (d)
iii and iv
A salt X which is an ingradient of antacid on thermal decomposition gives another salt Y which on recrystallisation gives the compound (Z) which is used
for removing permanent hardness of water. The compoundsX. Y and Z are respectively.
- (a)
Mg(OH)2, MgO, MgCO3
- (b)
Na2CO3, NaHCO3, NaOH
- (c)
CaCO3. CaO, Ca(HCO3)2
- (d)
NaHCO3, Na2CO3, Na2CO3·10H2O
Identify the organic acids among the following.
i) Tartaric acid
ii) Hydrobromic acid
iii) Oxalic acid
iv) Citric acid
- (a)
(i) and (iii)
- (b)
(i) and (iv)
- (c)
(i) , (iii) and (iv)
- (d)
(i), (ii). (iii) and (iv)
Formula of gypsfm is ____
- (a)
CaSO4. 1/2 H20
- (b)
CaSO4.2H2O
- (c)
MgSO4· 2H2O
- (d)
Na2So4. 7H2o
Acidity of magnesium hydroxide and basicity of phosphoric acid are respectively
- (a)
2,2
- (b)
2,3
- (c)
3,2
- (d)
1,3
An acid is ____________
- (a)
a proton donor
- (b)
a proton acceptor
- (c)
an electron donor
- (d)
an electron acceptor
When litmus is added to a solution of borax, it turns ______________
- (a)
red
- (b)
pink
- (c)
remains colourless
- (d)
blue
The most commonly used natural indicator' Litmus' is extracted from:
- (a)
Lichens
- (b)
Turmeric
- (c)
Indicators
- (d)
China rose
Ammonium hydroxide is found in:
- (a)
Window cleaner
- (b)
Detergents
- (c)
Soap
- (d)
Milk of magnesia
Which one is suitable method to find the accurate pH value?
- (a)
pH meter
- (b)
pH paper
- (c)
Universal indicator
- (d)
Litmus solution
Metallic oxides are ___________ in nature, but non-metallic oxides are ____________ in nature. The information in which alternative completes the given statement?
- (a)
neutral, acidic
- (b)
acidic, basic
- (c)
basic, neutral
- (d)
basic, acidic
CuO + (X) ⟶ CuSO4 + H2O. Here (X) is
- (a)
CuSO4
- (b)
HCl
- (c)
H2SO4
- (d)
HNO3
Methyl orange is
- (a)
an acidic indicator
- (b)
a basic indicator
- (c)
a neutral indicator
- (d)
none of these
A solution has pH 9. On dilution the pH value
- (a)
decreases
- (b)
increases
- (c)
remain same
- (d)
none of these
Plaster of paris is made from
- (a)
lime stone
- (b)
slaked lime
- (c)
quick lime
- (d)
gypsum
Setting of plaster of Paris takes place due to
- (a)
oxidation
- (b)
reduction
- (c)
dehydration
- (d)
hydration
Chemical formula of baking soda is-
- (a)
MgSO4
- (b)
Na2CO3
- (c)
NaHCO3
- (d)
MgCO3
The difference in number of water molecules in gypsum and plaster of paris is-
- (a)
5/2
- (b)
2
- (c)
1/2
- (d)
3/2
When a base is dissolved in water, the concentration of hydroxide ions per unit volume
- (a)
Increases
- (b)
Decreases
- (c)
Remains same
- (d)
May increase or decrease depending upon the base used.
Brine is an aqueous solution of
- (a)
Sodium hydroxide
- (b)
Sodium oxide
- (c)
Sodium chloride
- (d)
Potassium chloride
Fresh milk has a pH of 6. On changing into curd its pH becomes
- (a)
More than 6
- (b)
Less than 6
- (c)
Remains 6
- (d)
pH of curd can't be calculated.
An aqueous solution of the salt is acidic in nature. Which of the following acids and bases react to give this salt?
- (a)
Strong acid and weak base
- (b)
Strong acid and strong base
- (c)
Weak acid and weak base
- (d)
Weak acid and strong base
The chemical formula of blue vitriol is
- (a)
CuSO4.H20
- (b)
CuSO4.3H20
- (c)
CuSO4.5H20
- (d)
None of these
Which amongst the following can be used as an antacid?
- (a)
Vinegar
- (b)
Milk of magnesia
- (c)
Calcium hydroxide
- (d)
Sodium hydroxide,
A solution turns red litmus blue, its pH is likely to be
- (a)
1
- (b)
4
- (c)
5
- (d)
10
A solution reacts with crushed egg shells to give a gas that turns lime water milky. The solution contains
- (a)
NaCl
- (b)
HCl
- (c)
LiCl
- (d)
KCl
Which of the following will not turn blue litmus red?
- (a)
Vinegar
- (b)
Dry HCI gas
- (c)
Dilute hydrochloric acid
- (d)
Lemon juice
The gas liberated when few ml of dilute sulphuric acid is poured on metal carbonate taken in a test tube is
- (a)
Sulphur dioxide
- (b)
Sulphur trioxide
- (c)
Carbon dioxide
- (d)
Hydrogen.
