Font size
WorksheetsAcids, Bases & Salts
Total questions: 40
Worksheet time: 41mins
Zinc granules on treating with an acid X, forms zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.
X-Sulphuric acid , Y- Oxygen gas
X- Hydrochloric acid , Y- Oxygen gas
X- Hydrochloric acid , Y- Hydrogen gas
X- Sulphuric acid , Y- Hydrogen gas
Identify the products of the following reaction:
CaCO3 + 2HCl -->
Calcium hydrogen carbonate and chlorine gas
Calcium chloride and water
Calcium chloride, carbon dioxide and water
Calcium oxide, carbon dioxide and water
A salt is formed when nitric acid combines with sodium hydroxide. What are present in the salt that forms?
Sodium chloride
Sodium ions & nitrate ions
Only Sodium ions
Only Nitrate ions
Pickles form by soaking in an acid. What are some properties of pickles ?
Conducts electricity, bitter, turns litmus blue
Slippery, bitter, turns litmus blue
Slippery, sour, turns litmus blue
Sour, turns litmus red, can conduct electricity
When solutions P and Q are mixed, neutralisations occurs and a solution with a pH of 7 is obtained. What could the pH values of P and Q be?
A
B
C
D
Brine is an
aqueous solution of sodium hydroxide
aqueous solution of sodium carbonate
aqueous solution of sodium chloride
aqueous solution of sodium bicarbonate
How many water molecules does hydrated Calcium sulphate contain?
5
10
2.5
2
Which of the following statements is correct about an aqueous solution of an acid and of a base?
(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(in) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base
(i) and (iii)
(ii) and (iii)
(i) and (iv)
(ii) and (iv)
Lime water reacts with chlorine to give
Bleaching powder
Baking powder
Baking soda
Washing soda
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
Baking powder
Lime
Ammonium hydroxide solution
Hydrochloric acid
Sodium hydroxide turns phenolphthalein solution
pink
yellow
colourless
orange
Which of the following acid(s) never forms acidic salt?
(a) HCl
(b) H₃PO₄
(c) H₂SO₄
(d) H₂CO₃
(A) only
(D) only
(A) and (D) both
(A) and (C) both
Identify the element
(a) It is a white translucent solid
(b) It readily reacts with water and produces an alkaline solution
(c) It is stored in kerosene
Na
Ca
Al
P
Common salt beside being used in the kitchen can also be used as the raw material for the production of
(a) Baking powder
(b) Washing soda
(c) Black ash
(d) Slaked lime
(B) and (C)
(A) and (C)
(A) and (B)
(B) and (D)
During the preparation of HCl gas on a humid day, the gas is usually passed through the guard tube containing CaCl₂. The purpose of using CaCl₂ is
To add moisture to the gas (HCl)
To absorb HCl gas
To absorb moisture from HCl gas
To Use it as a catalyst
Which of the following phenomena occurs when acid is mixed with water
(a) Neutralization
(b) Dilution
(c) Ionization
Only (B) is correct
(A) & (B) are correct
(B) & (C) are correct
Only (C) is correct
Which of the given is a strong base?
Calcium hydroxide
Magnesium hydroxide
Ammonium hydroxide
Potassium hydroxide
In which one of the given reactions a salt is reacting with a base?
NaOH+HCl→NaCl+H₂O
Cu(OH)₂+H₂SO₄→CuSO₄+2H₂O
6NH₄OH+Al(SO₄)₃→2Al(OH)₃+3(NH₄)₂SO₄
KOH+HCl→KCl+H₂O
The sample of soil from a particular place was tested for its pH value. It came out to be 5. Which one of the following should be added to the soil to make it suitable for the plant growth?
i. Calcium chloride
ii. Calcium Hydroxide
iii. Calcium oxide
Both (i) and (ii)
Both (ii) and (iii)
Only (i)
Only (iii)
In the following reaction, identify the salt formed
NH4OH (aq) + H2SO4 (aq) → _____ + 2H2O (l)
NH4NO3
(NH4)2SO4
(NH4)3PO4
(NH4)2S
Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from:
Blue to green
Blue to white
Blue to sky blue
Blue to grey
Bleaching powder is used as a disinfectant for water to:
Make water tastier
Remove all the dirt from water
Make water germ-free
Make water clear
Farmers neutralize the effect of Acidity on soil by adding
Gypsum
Slaked Lime
Caustic Soda
Baking Soda
The function of quick lime in soda lime mixture is to
Absorb moisture present in soda lime
Increase the efficiency of soda lime
Increase the pH of soda lime
Take part in reaction with NaOH
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) The temperature of the solution increases
(ii) The temperature of the solution decreases
(iii) The temperature of the solution remains the same
(iv) Salt formation takes place
(i) only
(i) and (iii)
(ii) and (iii)
(i) and (iv)
Sodium carbonate is a basic salt because it is a salt of
strong acid and strong base
weak acid and weak base
strong acid and weak base
weak acid and strong base
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
Wash the hand with saline solution.
Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate
After washing with plenty of water and apply solution of sodium hydroxide on the hand
Neutralise the acid with a strong alkali
The pH of three solutions X, Y and Z is 6, 4 and 8 respectively. Which of the following is the correct order of acidic strength?
X > Y > Z
Z > Y > X
Y > X > Z
Z > X > Y
When the solution of an acid is diluted, what will be the change in pH of the solution?
pH of the solution remains the same
pH of the solution will increase
pH of the solution will decrease
pH of the solution climbs to 7
Match the chemical substances given in Column (A) with their appropriate application given in Column (B)
A-(ii), B-(i), C-(iv), D-(iii)
A-(iii), B-(ii), C-(iv), D-(i)
A-(iii), B-(iv), C-(i), D-(ii)
A-(ii), B-(iv), C-(i), D-(iii)
The process of formation of salt and water when an acid reacts with a base is called ……………
(a)
NaHCO, formed by reaction of
NaOH + H2CO3
NaCl + H2CO3
Na2CO3 + HCl
NaOH + Na2CO3
Assertion: Universal indicator gives green colour with distilled water.
Reason: pH of distilled water is 7 and it is neutral and universal indicator gives green colour with neutral solution.
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
Both A and R are false
A salt derived from strong acid and weak base will dissolve in water to give a solution which is
Acidic
Basic
Neutral
None of the above
Setting of plaster of Paris takes place due to
Dehydration
Oxidation
Hydration
Reduction
Methyl orange is
A neutral indicator
An acidic indicator
A basic indicator
None of these
When CO2 is passed through lime water, it turns milky. The milkiness is due to the formation of
Ca(OH)2
CaCO3
H2O
CO2
Caustic soda is the common name for
NaOH
Mg(OH)2
KOH
Ca(OH)2
The raw materials required for the manufacture of by Solvay process are
NH4Cl, NaCl2Ca(OH)2
NaCl, NH3, CaCO3, H2O
NaCl2, (NH4)2CO3, NH3
CaCl2, (NH4)2CO3, NH3
The difference in number of water molecules in Gypsum and Plaster of Paris is
2
3/2
5/2
1/2
