Free Online chemistry Practice test

Free Online chemistry Practice test
Free online chemistry practice test for all entrance exams
Free Online Chemistry Sample Papers Practice and Preparation Test
1. The valency of a phosphate ion is
(a) —l
(b) —2
(c) +3
(d) —3
Ans. (b)

2. Which of the following is acidic in nature?
(a) Apple juice
(b) Soap solution
(c) Slaked lime
(d) Lime
Ans. (a)

3. When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remains in the solution. The reaction is an example o
(a) a combination reaction
(b) a displacement reaction
(c) a decomposition reaction
(d) a double decomposition reaction
Ans. (d)

4, Which of the following acids is present in sour milk?
(a) Glycolic acid
(b) Lactic acid
(c) Citrus acid
(d) Tartaric acid
Ans. (b)

5. Zinc can displace copper from copper sulphate solution because zinc is
(a) More reactive than copper
(b) Less reactive than copper
(c) More stable than copper
(d) Less stable than copper
Ans. (a)

6. Which of the following is a strong acid?
(a) Nitric acid
(b) Citrus acid
(c) Formic acid
(d) Lactic acid
Ans. (a)

7. Carbon dioxide reacts with carbon to form Carbon monoxide. This is an example of a
(a) Displacement reaction
(b) Double displacement reaction
(c) Combination reaction
(d) Decomposition reaction
Ans. (d)

8. The sharp pain caused by the sting of an ant is due to
(a) Malic acid
(b) Nitric acid
(c) Formic acid
(d) Lactic acid
Ans. (c)

9. Which of the following reactions is not a decomposition reaction?
(a) Starch is converted to glucose in our body
(b) Proteins are digested to amino aids
(c) Magnesium ribbon is burnt in ai
(d) Electricity is passed through water
Ans. (c)

10. Which of the following acids is used in car batteries?
(a) Nitric acid
(b) Hydrochloric acid
(c) Sulphuric acid
(d) Carbonic acid
Ans. (c)

11. Which of the following statement is incorrect?
(a) Metals like Cu, Ag, Au cannot displace H from acids
(b) In reactivity series metals are arranged in order of increasing reactivity
(c) Silver cannot displace Cu form Cu(NO3) 2
(d) Zinc displaces Cu from CuSO4
Ans. (b)

12. Milk of magnesia is an
(a) Acid
(b) Ant acid
(c) Alkali
(d) Rock salt
Ans. (b)

13. Which type of salts are stored in air tight containers
(a) Anhydrous
(b) Hydrated
(c) Dehydrated
(d) Deliquescence
Ans. (d)

14. The substance that looses electrons is called as
(a) Oxidizing agent .
(b) Reducing agent
(c) Catalyst
(d) None of above
Ans. (b)

15. Which of the following statement is correct?
(a) Oxidation involves gain of electron
(b) Substance which is reduced is reducing agent
(c) Exothermic process involves absorption of heat
(d) Oxidation involves loss of electrons
Ans. (d)

16. Which of the following reaction is not endothermic in nature?
(a) Breaking of bonds
(b) Digestion of food
(c) Combustion of Carbon
(d) Evaporation of water
Ans. (c)

17. Basicity of acetic acid is
(a) 4
(b) 3
(c) 1
(d) 2
Ans. (c)


18. Which of following is fast reaction?
(a) Reaction between H2 and O2 to form H2O
(b) Reaction between acid and base to form salt and water
(c) Hydrolysis of ester
(d) Hydrolysis of sugar to glucose
Ans. (b)

19. When marble chips are treated with HCI , which of the following gas is liberated?
(a) CO2
(b) O2
(c) CO
(d) NO2
Ans. (a)


20. Which of the following is not a property of acids?
(a) All acids have a sour taste
(b) Acids turn blue litmus red
(c) Acids turn red litmus blue
(d) All acids form H ions in water
Ans. (c)