RRB Group D - Chemical reactions and periodic classification Online Test (MCQ Quiz)

1. Which of the following is a balanced chemical equation for the synthesis of water from hydrogen and oxygen?

A) H2 + O2 -> H2O B) 2H2 + O2 -> 2H2O C) H2 + O -> H2O D) 2H + O2 -> H2O2

2. What does the law of conservation of mass state in a chemical reaction?

A) Mass can be created but not destroyed. B) Mass can be destroyed but not created. C) Mass is neither created nor destroyed. D) Mass is proportional to energy.

3. Identify the type of chemical reaction: A + B -> AB

A) Decomposition reaction B) Displacement reaction C) Combination reaction D) Double displacement reaction

4. Which element is characterized by the symbol 'Fe'?

A) Fluorine B) Iron C) Phosphorus D) Silver

5. In the periodic table, elements are arranged in order of increasing:

A) Atomic mass B) Number of neutrons C) Atomic number D) Number of valence electrons

6. What is the atomic number of Carbon?

A) 4 B) 5 C) 6 D) 7

7. Which group in the periodic table contains the alkali metals?

A) Group 1 B) Group 2 C) Group 17 D) Group 18

8. What type of bond is formed between a metal and a non-metal?

A) Covalent bond B) Ionic bond C) Metallic bond D) Hydrogen bond

9. Which of the following is an example of a decomposition reaction?

A) 2H2 + O2 -> 2H2O B) Zn + CuSO4 -> ZnSO4 + Cu C) CaCO3 -> CaO + CO2 D) AgNO3 + NaCl -> AgCl + NaNO3

10. What is the chemical formula for common salt?

A) KCl B) NaCl C) MgCl2 D) CaCO3

11. The vertical columns in the periodic table are called:

A) Periods B) Groups C) Series D) Blocks

12. Which element has the electronic configuration 2, 8, 1?

A) Sodium B) Potassium C) Lithium D) Magnesium

13. What is the valency of Oxygen in most of its compounds?

A) 1 B) 2 C) 3 D) 4

14. Which of the following is a redox reaction?

A) HCl + NaOH -> NaCl + H2O B) CaCO3 -> CaO + CO2 C) 2KClO3 -> 2KCl + 3O2 D) Zn + 2HCl -> ZnCl2 + H2

15. What is the IUPAC name for H2O?

A) Dihydrogen monoxide B) Hydrogen oxide C) Water D) Hydroxic acid

16. The horizontal rows in the periodic table are called:

A) Groups B) Periods C) Blocks D) Series

17. Which element is the most electronegative?

A) Oxygen B) Chlorine C) Fluorine D) Nitrogen

18. What is the chemical formula for methane?

A) C2H6 B) CH4 C) C3H8 D) CO2

19. Identify the type of reaction: CuO + H2 -> Cu + H2O

A) Combination B) Decomposition C) Redox reaction D) Neutralization

20. Which noble gas has the highest atomic number?

A) Helium B) Neon C) Argon D) Radon

21. What is the state of matter for most elements in Group 18 (noble gases) at room temperature?

A) Solid B) Liquid C) Gas D) Plasma

22. Which element is known as the 'universal solvent'?

A) Ethanol B) Acetone C) Water D) Methanol

23. What is the atomic mass of Helium?

A) 1.008 amu B) 4.003 amu C) 12.011 amu D) 15.999 amu

24. Which of the following is a characteristic of metals?

A) Dull luster B) Poor conductors of heat and electricity C) Tendency to lose electrons D) High ionization energy

25. What is the chemical symbol for Potassium?

A) P B) K C) Pt D) Po

26. The process of adding oxygen or removing hydrogen is called:

A) Reduction B) Oxidation C) Neutralization D) Combustion

27. Which period does Sodium (Na) belong to in the periodic table?

A) Period 1 B) Period 2 C) Period 3 D) Period 4

28. What is the atomic number of Sodium?

A) 10 B) 11 C) 12 D) 13

29. Which of the following is a strong acid?

A) Acetic acid B) Carbonic acid C) Hydrochloric acid D) Sulfurous acid

30. What is the chemical formula for sulfuric acid?

A) H2SO3 B) H2SO4 C) HNO3 D) HCl

31. A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is called a(n):

A) Inhibitor B) Catalyst C) Reactant D) Product

32. Which element is in Group 17 and Period 3?

A) Fluorine B) Chlorine C) Bromine D) Iodine

33. What is the common name for the compound C6H12O6?

A) Sucrose B) Glucose C) Lactose D) Fructose

34. Which type of reaction involves the transfer of ions between two compounds?

A) Combination B) Decomposition C) Single displacement D) Double displacement

35. What is the valency of Chlorine in HCl?

A) 0 B) 1 C) 2 D) 3

36. Which of the following is a non-metal that exists as a diatomic molecule?

A) Sulfur B) Phosphorus C) Nitrogen D) Carbon

37. What is the symbol for the element Silver?

A) Si B) Ag C) Au D) Ar

38. The tendency of an atom to attract a bonding pair of electrons is called:

A) Ionization energy B) Electron affinity C) Electronegativity D) Metallic character

39. Which group contains the halogens?

A) Group 1 B) Group 2 C) Group 16 D) Group 17

40. What is the chemical formula for calcium carbonate?

A) CaCO B) Ca(CO3)2 C) CaCO3 D) Ca2CO3

41. Which of the following is an endothermic reaction?

A) Combustion of wood B) Respiration C) Photosynthesis D) Explosion of dynamite

42. What is the atomic number of Oxygen?

A) 6 B) 7 C) 8 D) 9

43. Which element is a metalloid?

A) Sodium B) Iron C) Silicon D) Sulfur

44. What is the process where a solid directly changes into a gas?

A) Melting B) Evaporation C) Sublimation D) Condensation

45. Which element has the symbol 'Au'?

A) Silver B) Aluminum C) Gold D) Argon

46. What is the common name for the compound CH4?

A) Ethane B) Propane C) Methane D) Butane

47. Which of the following is an example of a single displacement reaction?

A) 2H2 + O2 -> 2H2O B) Zn + CuSO4 -> ZnSO4 + Cu C) HCl + NaOH -> NaCl + H2O D) CaCO3 -> CaO + CO2

48. What is the atomic number of Neon?

A) 8 B) 9 C) 10 D) 11

49. Which family of elements is known for being highly reactive and having one valence electron?

A) Alkaline earth metals B) Halogens C) Alkali metals D) Noble gases

50. What is the chemical formula for ammonia?

A) NO2 B) NH3 C) H2O D) SO2

Chemical reactions and periodic classification - Online Test

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