Kerala SCERT Class 9 Chemistry Acids, Bases, Salts Question Answer
Kerala SCERT Class 9 Chemistry Chapter 5 Acids, Bases, Salts Question Answer Solution Here. Kerala Board Class 9 Students can find Here 5th Chapter Acids, Bases, Salts Notes provide by our Teacher. Important Question Answer from Chapter 5 Acids, Bases, Salts.
- Board- Kerala Board.
- Class – 9.
- Subject – Chemistry Part 2
- Chapter – 5
- Chapter Name – Acids, Bases, Salts.
- Topic – Question Answer Solution.
Q.1) MCQ
1) Which of the following is chemical of Caustic Soda.
a) NaOH
b) KOH
c) Ca(OH)2
d) H2SO4
2) Which of the following is alkali.
a) HCl
b) H2SO4
c) NaOH
d) Al(OH)3
3) If pH value of vinegar is 4.2, it is ————- in nature.
a) acid
b) alkali
c) base
d) Neutral
4) Which of the following salts used as fertilizers.
a) NaCl
b) KCl
c) MgSO4
d) CaSO4
5) Salts are electrically______________.
a) acidic
b) basic
c) neutral
d) zero
6) In Sodium chloride, which ion is positive.
a) Na
b) Ca
c) Cl
d) OH
7) From the following, which acid is produced in stomach,
a) KCl
b) H2SO4
c) HCl
d) H3PO4
8) From the following, which antacid used to reduce acidity in stomach.
a) Aluminium Carbonate
b) Sodium Chloride
c) Aluminium Chloride
d) Calcium Hydroxide
9) Which substance turns blue litmus red.
a) base
b) acid
c) neutral
d) None of the above
10) Which of the following is formula of Sulfuric acid.
a) SO3
b) H2SO4
c) NaHSO3
d) H3PO4
Q.2) Very Short answer questions.
1) Define acids and write two examples of acid.
2) Define bases and write two examples of bases.
3) What is alkalies? give its examples.
4) Define neutralisation reaction.
5) What is antacids, give its examples.
6) Define pH value.
7) What is pH meter.
8) HCl + NaOHà___________
Complete the reaction and name the above reaction.
9) Give the reaction between Sulfuric acid and Magnesium hydroxide.
10) Write Chemical formula of following,
a) Cuprous ion
b) Magnesium Sulphate
c) Calcium carbonate
d) Aluminium hydroxide
11) Salts are electrically neutral, why.?
12) Complete the reaction.
1) KCL à K+ + ____________.
2) Mg (OH)2à_________+ 2OH–
Q.3) Short answer question on Kerala SCERT Class 9 Chemistry Acids Bases and Salts
1) Complete the following table.
S.N. | Name of Acid | Chemical Formula |
1 | Nitric acid | |
2 | Sulphuric acid | |
3 | Hydrochloric acid | |
4 | Carbonic acid |
2) State difference between acidity and basicity,
3) Define Neutralisation reaction, and explain it with example.
4) How does pH of value calculated, byusing litmus paper method.
5) Who discovered pH value Scale? Draw its diagrammatic representation And explain.
6) How does pH value of soil affects the agricultural crops.
7) Complete the table.
S.N. |
Name of ions |
Symbols |
1 | Zinc ion | ————– |
2 | —————- | SO2-4 |
3 | Phosphate ion | ————— |
4 | Cupric ion | ————— |
5 | —————- | OH– |
6 | Carbonate ion | ————— |
8) State the numbers of positive ions and negative ions present in a Molecule.
a) NaCl
b) MgSO4
c) CaCO3
d) ZnSO4
e) Na2SO3
f) MgCl2
9) Write uses of Salts, with some example.
Q.4) Long answer questions.
1) Complete the reaction of ionization of phosphoric acid.
a) H3PO4à H+ + —————-
b) ———à H+ + —————-
c) ——–à H+ + PO34
2) Three beakers contains solution of, Magnesium Chloride, Sodium
Chloride and Ammonium Sulphate respectively.
Dip a litmus paper (red,blue) in each beaker.
Salt |
Colour of litmus | Nature of substance |
A |
|
|
B |
||
C |
a) Name the acid and alkali that reacts to form each salt given above.
3) Write chemical names of following.
1) Mg (H2PO4)3
2) Mg HPO4
3) Mg3 (PO4)2
4) NaHCO3
5) Na2CO3
S.N. | Substance | pH |
1 | Vinegar | 4.2 |
2 | Lime water | 10.5 |
3 | Milk | 6.4 |
4 | Water | 7 |
5 | Blood | 7.3 |
6 | Tooth Paste | 8.7 |
4) By analysing the given table, answer the following questions.
a) Classify the substances into acids and alkali.
b) Is blood acidic or basic.
c) Which from the above is strongly basic.
d) Which is strongly acidic.
e) The pH of milk is 6.4. Does pH value affected when milk changes to curd. Justify.
5) Complete the table.
S.N. | Common Name | Chemical Name |
1 | Gypsum | |
2 | Baking Soda | |
3 | Washing Soda | |
4 | Blue Vitriol | |
5 | Sylvine | |
6 | Table Salt |
a) Give the uses of washing soda and baking soda.
6) a) Name the salt formed by reaction between calcium
Hydroxide and dilute hydroxide acid.
b) Write the equation for the reaction.
c) Which acid is required for preparation of Calcium Sulphate.
7) Complete the below equations.
KClà K+ + ———-
H2SO4à 2H+ + ———-
NH4Cl àNH+4 + ———-
CaSO4à——–+———-
HNO3à——–+———-
HClà H+ +—————-
8) Identify Symbol of ions and rewrite with their names.
(PO3-4, CO2-3 , Cu2+, Fe3+, Cu+ , HCO–3, No–3,H2PO–4,HSO–4)
Solution
Kerala SCERT Class 9 Chemistry Solution Acid Bases SaltsFor more update follow net explanations page