Chemistry-[Diploma]-Set-1



Multiple Choice Questions


1. FeCl₃ is…




... Answer is C)
FeCl₃ is Ferric chloride.


2. Valency of cuprous ion is...




... Answer is A)
Valency of cuprous ion is 1 & 2.


3. Elements having atomic number 11 and 17 most likely forms........bond.




... Answer is A)
Elements having atomic number 11 and 17 most likely forms electrovalent bond.



4. The tendency of an atom to draw the share pair of electrons towards itself is....




... Answer is A)
The tendency of an atom to draw the share pair of electrons towards itself is electronegativity.


5. Ozone molecule has......oxygen atom.




... Answer is C)
Ozone molecule has 3 oxygen atoms.


6. In the given balanced chemical reaction “CH₄+2O₂→CO₂+xH₂O”, the value of x is....?




... Answer is B)
The value of x is 2.


7. The chemical properties of the elements are determined by....




... Answer is A)
The chemical properties of the elements are determined by atomic number.


8. Variable valency is generally shown by.......




... Answer is C)
Variable valency is generally shown by d-block elements.


9. Atoms of same element which have same atomic number but different atomic mass are called.....?




... Answer is B)
Atoms of same element which have same atomic number but different atomic mass are called isotopes


10. The maximum number of electrons that a shell can accommodate is given by....




... Answer is B)
The maximum number of electrons that a shell can accommodate is given by 2n² rule.


11. The maximum number of electrons present in d-subshell is.....




... Answer is C)
The maximum number of electrons present in d-subshell is 10.


12. Carbon has valency 4 in CH₄ and CO₂. Find the valency of Carbon in C₂H₆.




... Answer is C)
The valency of carbon in C₂H₆ is 3.


13. The molecular formula of hydrated lime is.....




... Answer is C)
The molecular formula of hydrated lime is Ca(OH)₂.


14. Which is the tetravalent element?




... Answer is A)
In Greek language, tetra means 4. Since C (carbon) has valency 4, it is called tetravalent element.


15. What is the molecular formula of Auric chloride?




... Answer is C)
The molecular formula of Auric chloride is AuCl₃.


16. Valency of Carbonate radical is...?




... Answer is D)
Valency of Carbonate radical is 2.


17. Molecular formula of oxygen is....




... Answer is B)
Molecular formula of oxygen is O₂.


18. Sodium zincate is.....




... Answer is A)
Sodium zincate is Na₂ZnO₂.


19. An example of double bonded molecule is....?




... Answer is B)
An example of double bonded molecule is O₂


20. Valency of Nitrogen is....




... Answer is C)
Valency of nitrogen is 3.


21. The valency of silicon is......




... Answer is D)
The valency of silicon is 4.


22. The valency of nitrogen in Ammonia (NH₃) is....




... Answer is A)
The valency of nitrogen in Ammonia (NH₃) is 3.


23. ‘Deuterium’ is isotopes of hydrogen, which has......




... Answer is B)
‘Deuterium’ is isotopes of hydrogen, which has 1e⁻, 1p⁺ & 1n⁰.


24. If the Latin name of Sodium is Natrium, what is the Latin name of Lead?




... Answer is B)
The Latin name of Lead is Plumbum.


25. 2,8,8,2 is electronic configuration of......




... Answer is D)
2,8,8,2 is electronic configuration of Ca (calcium).


26. The valency of Iron in ferrous sulphate is....?




... Answer is C)
The valency of iron in ferrous sulphate is 2.


27. The valency of copper is.....




... Answer is B)
The valency of copper is 1,2.


28. The element having one proton, one neutron and one electron is known as......




... Answer is C)
The element having one proton, one neutron and one electron is known as Deuterium.


29. Which of the following radical has valency “2”? ?




... Answer is B)
Sulphate radical has valency “2”


30. If the atomic number of Aluminium is 13 and atomic weight is 27, what is the number of neutrons in Aluminium?




... Answer is D)
The number of neutrons in Aluminium is 14.


31. Which electrons in atom can take part in a chemical reaction?




... Answer is A)
Valence electrons can take part in a chemical reaction.


32. Which of the follwing compound is electron deficient?




... Answer is D)
We know that valency of hydrogen is +1 and of oxygen is -2. So molecular weight of H₂O = 2×H+1×O = 2×(+1)+1×(-2) = +2-2= 0. Since molecular weight of H₂O is 0, it is electron deficient.


33. Which of the following is an ionic compound?




... Answer is C)
NH₃ is an ionic compound because it produces ions (positively or negatively charged particle) and conduct electricity when dissolved in water.


34. Which of the folllowing compound can conduct electricity in aqueous solution?




... Answer is C)
NaCl can conduct electricity in their aqueous solution.


35. The number of neutrons in Mg is......




... Answer is A)
The number of neutrons in Mg (Magnesium) is 12.


36. What is the atomic weight of Sodium??




... Answer is C)
The atomic weight of sodium is 23.


37. What is the valency of lead?




... Answer is D)
The valency of lead is 2,4.


38. Which of the following element is found in liquid state?




... Answer is D)
Both mercury and bromine are found in liquid state. Mercury is a liquid metal whereas Bromine is a liquid non-metal.


39. Which of the following symbol is correct for phosphate radical??




... Answer is A)
PO₄⁻⁻⁻ symbol is correct for phosphate radical.


40. Al can form........ion.




... Answer is A)
Al can form Al⁺⁺⁺ ion because its valency is +3.


41. Which of the following is not an acidic radical?




... Answer is A)
Acidic means electronegative. Since Ammonium is an electropositive radical, it is not an acidic radical.


42. Which of the following is pentavalent?




... Answer is C)
In Greek language, penta means 5. Since valency of both nitrogen and phosphorus is 5, they are pentavalent elements.


43. Which of the following elements show variable valency?




... Answer is D)
Mercury, Gold and Tin all show variable valency.


44. The valency of P in phosphorus pentoxide is.....




... Answer is B)
The valency of P in phosphorus pentoxide is 5.


45. The basic unit of the substance is......




... Answer is D)
The basic unit of the substance is atom.


46. The Gun Powder contains the mixture of....?




... Answer is B)
The Gun powder contains the mixture of KNO₃+S+Charcoal


47. The Latin name of mercury is.......




... Answer is D)
The Latin name of mercury is hydrargyrum.


48. The symbol of Antimony is.....




... Answer is B)
The symbol of Antimony is Sb.


49. How many elements are there in nature??




... Answer is D)
There are only 92 elements in nature.

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