Exam Questions And Quiz Test Inorganic Chemistry

Exam Questions And Quiz Test Inorganic Chemistry
These Objective Solved Questions are very useful for Quiz on Chemistry andjob recruitment exams Like PSC UPSC NDA etc

1. When a little sulphur in a spoon is heated, it burns with a blue flame which slowly disappears after some time and we can feel a pungent odour. This pungent odour is due to
(a) Carbon dioxide
(b) Sulphur dioxide
(c) Sulphur gas
(d) Sulphuric acid
Ans. (b)

2. The formula of Baking soda is
(a) Sodium carbonate
(b) Sodium bicarbonate
(c) Calcium carbonate
(d) Sodium hydroid
Ans. (b)

3. Which of the foll6wing is a weak base?
(a) NaOH
(b) KOH
(c) NH4OH
(d) None of these
Ans. (c)

4. A basic salt that is used in daily life is
(a) Sodium acetate
(b) Sodium chloride
(c) Ammonium sulphate
(d) Sodium carbonate
Ans. (b)

5. Which of the following is spread on icy roads to melt ice in cold countries?
(a) Sodium bicarbonate
(b) Rock salt
(c) Sodium hydroxide
(d) None of these
Ans. (b)

6. Which of the following is a hydrated salt?
(a) Ca(OH) 4
(b) MgCO3
(c) MgSO.7H2O
(d) BaSO4
Ans. (c)

7. Calcium phosphate can be obtained by reacting calcium hydroxide with
(a) Phosphoric acid
(b) Nulphuric acid
(c) Nitric acid
(d) Both (b) and (c)
Ans. (a)

8. Epsom salt is
(a) CuSO4
(b) CaSO4
(c) MgSO4
(d) Na2SO4
Ans. (c)

9. What happens when hydrated copper sulphate is heated?
(a) It becomes colourless
(b) It turns into anhydrous salt
(c) It loses water of crystallization
(d) All of the above
Ans. (d)


10. Which of the following statement is correct?
(a) Only organic acids conduct electricity
(b) Only mineral acids conduct electricity
(c) All acid solutions, whether organic acids or mineral acids, conduct electricity
(d) None of these
Ans. (c)

11. Which of the following acid is also known as battery acid that is used in car batteries?
(a) H2SO4
(b) HCI
(c) HNO3
(d) H3PO4
Ans. (a)


12. What happens to the colour of litmus paper when a drop of acid falls on it?
(a) Colour fades
(b) From blue it turns red
(c) From red it turns blue
(d) Remains unchanged
Ans. (b)

13. The term ‘pH’ comes from
(a) Hydrogen purity
(b) Pure Hydrogen
(c) Hydrogen power
(d) Purity of Hydrogen
Ans. (c)

14. The pH of 1 x 10-8 M HC1 solution is
(a) 8
(b) 7
(c) 6
(d) None of the above
Ans. (d)

15.While mixing H2SO4 with water which of the• following precautions should be taken?
(a) Never add acid to water
(b) Never add water to acid
(c) Add the lighter heavier liquid
(d) Avoid sunlight
Ans. (b)


16. Which of the following may be regarded as weak electrolytes?
(a) NaC1
(b) CH3COONa
(c) HC1
(d) CH3COOH
Ans. (d)

17. The pH of three solutions A, B, C is 6, 4, 8 receptivity which of the following is the correct option?
(a) A>B>C decreasing acidic strength
(b) C>B>A increasing acidic strength
(c) B>A>C is decreasing acidic strength
(d) C>B>A decreasing acidic strength
Ans. (c)

18. An aqueous solution of NaCl is
(a) Acidic
(b) Basic
(c) neutral
(d) Either acidic / basic
Ans. (c)

19. ‘Alum’ is an example of
(a) Single salt
(b) Double salt
(c) Acids
(d) None of above
Ans. (b)

20. All salts are
(a) Strong electrolytes
(b) Weak electrolytes
(c) Non electrolytes
(d) Either weak or strong
Ans. (d)

21. An aqueous solution of CH3COONa is
(a) Acidic
(b) Basic
(c) Amphitricha
(d) Either Acklic/Basic
Ans. (b)

22. A pH -2 solutions is more acidic than one with pH 6 by a factor of
(a) 4000
(b) 2
(c) 10000
(d) 8000
Ans. (c)

23. Electro refining which is based on phenomenon of Electrolysis where
(a) Impure metal is made anode and pure metal is cathode
(b) Impure metal is cathode and pure metal is anode
(c) Pure metal makes both anode and cathode
(d) None of the above

24. Which of the following is an example of strong electrolyte?
(a) NH4OH solution
(b) NaOH
(c) CH3COONa
(d) HCN
Ans. (b)

25. The loss of water of crystallization to the atmosphere by a compound is termed
(a) deliquescence
(b) dehydration
(c) efflorescence
(d) hydrolysis
Ans. (c)