TEST QUESTIONS ON GROUP 4A ELEMENTS, CARBON FAMILY

Quiz Application

GROUP 4A ELEMENTS, CARBON FAMILY

please fill above required data

GROUP 4A ELEMENTS, CARBON FAMILY

Total Questions: 70

you'll have 25 second to answer each question.

Time's Up
score:
Kerala PSC

Quiz Result


Total Questions:

Attempt:

Correct:

Wrong:

Percentage:


HTML Quiz Generator

Quiz Answers

1. Which of the following is the most stable?

Pb2+


2. Why can't HF be stored in glass bottles, but in plastic bottles?

HF reacts with the silicate in glass


3. A very small amount of electrical conductivity is measured in _

Silicon and Germanium


4. Which of these group 4A elements has the lowest melting point?

Tin


5. In which of these compounds does the metal has an oxidation state of +2

SnO


6. Elements with giant molecular structures and strong covalent bonds include...

All of the above options


7. The element Germanium in group 4A is a _

Metalloid


8. One of these acts as an insulator

Carbon (diamond)


9. In metalloid of group 4A, the electrical conductivity increases with

Increase in temperature


10. The group 4A element that has the highest bond energy is...

C–C bond


11. Oxides formed by the group 4A elements have oxidation state of

2 and 4


12. All of these tetrachloride are hydrolysed by water except

CCl4


13. At room temperature, group 4A tetrachlorides are...

Liquids


14. On heating lead(II) oxide (PbO), which of these will be produced?

All of the above


15. One of these trends decreases as we move down group 4A

Bond energy


16. Both ionization energy and density increases as we move down group 4A

False


17. The hydrides of germanium are known as...

Germanes


18. The group 4A elements form _ hydrides

Covalent


19. Which of the following elements does not belong to the carbon family?

Aluminium


20. Dry ice is _

Solid carbon dioxide


21. Si–O bond > C–O bond

True


22. A low temperature bath for use in the lab is required to maintain a temperature of 190K, which of these would you use?

Solid CO2 and acetone


23. Which of the following elements belong to group 4A?

Ge, Sn


24. SiCl4, PCl5, SiF62- and PCl3 are compounds which can be hydrolysed by water to give acidic solutions. Which of these molecules possesses the sp3d hybrid orbital type?

PCl5


25. One of the following statements is not true about group 4A elements on descending the group

Their ability to catenate increases


26. Graphite is exploited commercially for the following reasons except...

Hardness


27. One of the following statements is not true about this equation

PbO2(s) + 4HCl(aq) → PbCl2(aq) + Cl2(g) + 2H2O(l)

Lead dioxide is being oxidized


28. Which of the following member of group 4A is toxic?

Lead


29. Which of the following is a metalloid?

Germanium


30. The hardest known allotrope of carbon is...

Diamond


31. Which of the following pair crystallizes with the same structure as a diamond?

Si and Ge


32. _ is the most abundant element in group 4A

Si


33. _ is an impure allotrope of carbon?

Amorphous carbon


34. One of the following represents the electronic arrangement of Silicon

[Ne] 3s2 3p2


35. The structure changes for group 4A elements is from...

The structure changes from giant molecular lattices in carbon and silicon to giant metallic structure in Tin and Lead


36. The ability of carbon to catenate results from the fact that...

The C–C bond is almost as strong as the C–O bond


37. One of the following is not a property of SnH4 and PbH4

They form volatile liquids at room temperature


38. The structure of diamond is...

A three dimensional array of carbon atoms, each atom surrounded tetrahedrally by four other carbon atoms


39. Group 4A elements exhibit inert pair effect which is when...

Two electrons in the p orbital are removed, the remainder in the s orbital are held more strongly by the increased positive charge in the s orbital


40. The first ionization energy decreases greatly between carbon and silicon but decreases very little for the other elements because...

There is a larger increase in nuclear charge due to the filling of d and f orbitals which counterbalances the increase in atomic radii


41. There are 3 types of carbides: _, _ and _

Covalent, interstitial and salt-like


42. Diamond is colourless, and its carbon atoms are _ hybridized

sp3


43. Graphite forms a _ sheet like polymeric structure

Two–dimensional


44. CO is a poisonous gas, sparingly soluble in water and formed by which of these reactions?

HCOOH + H2SO4 → CO + H2O


45. Carbon differs from the other elements in its limitation to a coordination number of four because there are no _ in the second shell

d orbital


46. Carbon dioxide is _

An acidic oxide


47. Pyrex is a type of _ glass

Borosilicate glass


48. Which of these statements is incorrect

Carbon tetrachloride is readily hydrolysed by water


49. Which of these imparts a red colour to glass?

Copper(I) oxide


50. One of these is not a component of glass

Reducing agents


51. The main component in glass is...

Silica


52. Which of these silicon compounds is used to remove permanent hardness of water?

Zeolite


53. Glass is a material with the internal structure of a _, but the hardness of a _

Liquid, solid


54. Which allotrope of carbon has a high refractive index and is used as a gemstone?

Diamond


55. Cyanogen is a radical

False


56. One of these is not a component of greenhouse gas

CO


57. Graphite can conduct electricity due to...

Presence of delocalized electrons


58. A single isolated layer of graphite is known as...

Graphene


59. What is the correct trend for electronegativity as we move down group 4A?

Electronegativity decreases


60. The carbon atoms in graphite are _ hybridized

sp2


61. In which of these carbon allotropes are the carbon atoms arranged in the form of a hollow sphere?

Fullerene


62. Which of these group 4A elements is radioactive?

Fl


63. Silicon reacts with steam at red heat to form

SiO2


64. SiO2 is amphoteric

False


65. A silicone is a polymer composed of...

—R2Si—O—SiR2—


66. Which of these is the primary function of a flux during glass formation?

It lowers the melting point of silica


67. Which of these is a commonly used stabiliser during production of soda glass

CaCO3


68. Which type of glass is usually used in high quality screen protectors for mobile phones?

Alumino-silicate glass


69. Which group 4A element has high density and is used as a protection against radiation?

Pb


70. The most common ore of lead is...

Galena


Blogger tips and tricks


#buttons=(Accept) #days=(20)

This website uses cookies to enhance your experience. Learn More
Accept
To Top