Chemistry Objective Model Test - 1

1. Usually the rate of reaction will be double for increase of temperature –

a) 10⁰C b) 20⁰C c) 30⁰C d) 40⁰C

2. When did scientist kossel give the idea of ionic bond?

a) 1910 b) 1912 c) 1915 d) 1916

3. Which of the metal can not replace hydrogen from acid?

a) Mg b) Zn c) Ag d) Fe.

4. In thermochemical reaction the standard temperature is –

a) O k b) 298 k c) 100 k d) 273 k

5. Which one of the following ion is at the top of the reactivity series?

a) SO₄^2- b) SO₃^2- c) OH^- d) Cl^-

6. What is the cause of passivation of iron?

a) Zine sulphate b) Copper sulphate

c) Rust d) Tri –iron tetraoxide

7. Which one of the following metal is used for the preparation of fire producing bomb?

a) Ca b) Na c) Pb d) Mg

8. Which one of the following used to produce white fumes in the theatre stage?

a) NH₃ b) CO₂ c) NO₂ d) SO₂

9. Which one of the following attacks methyl group in acetic acid?

a) PCl₃ b) PCl₅ c) Cl₂ d) Na

10. Which one of the following has maximum intermolecular force?

a) Kerosene b) Water

c) Common slat d) Nitrogen.

11. Who first introduced the concept of the law of Reciprocal proportions?

a) John Dalton b) Richter

c) Gay Lussac d) Avogadro

12. What in the volume of 16 gm oxygen gas at S.T.P. ?

a) 22.4 L b) 11.2 L c) 224 L d) 448 L.

13. The molecular mass of a compound is 180 and empirical formula is CH₂O. What is the molecular formula of the compound?

a) CH₄O b) C₆H₆O

c) C₆H₁₂O₆ d) H₂CO₃

14. What is the valency of thio sulphate Radical?

a) 1 b) 2 c) 3 d) 4

15. Which one of the following is not stable fundamental particle?

a) Proton b) Neutron c) Electron d) Positron

16. The shape of a molecule of ammonia is-

a) Linear b) Angular

c) Pyramidal d) Tetrahedral.

17. 2, 8, 18 is the electronic configuration of –

a) Argon b) Kripton c) Helium d) Radon

18. Ammonium Cyanate is converted into Urea by

a) Isomerism b) Neutralisation

c) Decomposition d) Polymerisation

19. Which is necessary for the chemical reaction, CH₄ + Cl₂ = CH₃ Cl + HCl?

a) Light b) Electricity

c) Heat d) Pressure.

20. The heat of neutralisation of a strong acid and a strong base is –

a) -57.3 KJ b) 57.3 KJ c) 100 KJ d) 573 KJ

21. Which one of the following is not produced by the electrolysis of a solution of sodium chloride?

a) Iron b) Sodium hydroxide

c) Hydrogen d) Chlorine

22. Which one can show the property of catenation?

a) Na b) H₂ c) Cl₂ d) C.

23. Which is the formula of gluconic acid?

a) C₆H₁₂O₇ b) C₆ H₆

c) C₁₂ H₂₂ O₁₁ d) C₆ H₁₂ O₆.

24. Which one of the following is used for the preparation of rat Killer?

a) S b) Cl₂ c) P d) N₂

25. Which one reacts with water catches fire?

a) Calcium b) Magnesium

c) Potassium d) Zinc

26. When heated, some solid substances, are directly converted into vapour. This process is called-

a) Distillation b) Sublimation

c) Evaporation d) Condensation

27. Which one of the following is metalloid?

a) Mercury b) copper

c) Zinc d) Boron.

28. Which of the following element has valency 3 ?

a) S b) Na c) N d) C.

29. What is the percentage of composition of oxygen in perchloric acid?

a) 0.996% b) 32% c) 35.3% d) 63.68%

30. Which one of the two isotopes is not equal?

a) Atomic Number b) Electron

c) Mass Number d) Chemical properties

31. Which one of the following is polar compound?

a) Alcohol b) Ether c) Benzene d) Petrol

32. How many atoms are in a molecule of sulphur?

a) 2 b) 4 c) 6 d) 8

33. Which oxide belongs to the element of group VI ?

a) P₂O₅ b) Al₂O₃ c) SO₃ d) Cl₂ O₇

34. What is absolutely necessary for a chemical reaction?

a) Heat b) Light c) Catalyst.

d) contanct between the reactants.

35. Which of the following compound is aromatic?

a) C₂H­₆ b) C₂H₄ c) CH₃Cl d) C₆H₅ CH₃