Versatile nature of carbon - class-XI
Description: versatile nature of carbon | |
Number of Questions: 48 | |
Created by: Sharvani Hegde | |
Tags: organic chemistry : some basic principles and techniques the world of carbon chemistry carbon carbon and fuel carbon compounds allotropy of carbon carbon- an important element organic chemistry : basic principles and techniques organic chemistry occurrence of carbon compounds in nature carbon and its compounds |
Which of the following statements is/are incorrect for diamond?
(a) The refractive index of diamond is highest among solids.
(b) Diamond is hard because all the valence electrons of each carbon atom are involved in bond formation.
(c) Diamond is thermodynamically more stable than graphite.
(d) One carat of diamond represents its weight.
Carbon in __________ form conducts electricity.
The carbon atoms in diamond are bonded to each other by:
Fullerene, an allotrope of carbon, has 60 carbon atoms joined together and no other element in it. There are various types of fullerenes. $C _{60}, C _{70}, C _{74}$ and $C _{78}$ are the members of the fullerene family. Identify the property due to which such large numbers of carbon atoms are joined together in this molecule :
Which of the following is not an allotrope of carbon?
Which of the following is not an allotropic form of carbon?
Carbon forms bonds with another element by :
Which of the following is the true statement for carbon atoms :
____________ is the crystalline allotrope of carbon.
Which of the following elements shows allotropy ?
Diamond and graphite are the covalent compounds of carbon element (C).
$C _{graphite}+O _{2(g)}\rightarrow CO _{2(g)}; \Delta H=-393.5kJ, \Delta H$ of the reaction cannot be:
Select the compound from the following which dissolves in water:
Which of the following statements are incorrect?
I. Diamond is the hardest natural substance known and has very high melting and boiling point.
II. Iodine is a metal like lithium, sodium, and potassium are so hard that they cannot be cut with a knife. They have high densities and high melting point.
IV. Most of the non- metals produce acidic oxides while most of the metals produce basic oxides.
V. Graphite is a conductor of electricity.
The property of catenation is strongest in carbon because?
What are the two properties of carbon which led to the huge number of carbon compounds we see around us?
Buckminsterfullerene is an allotropic form of:
In diamond, the bonding between carbon atoms is :
Diamond is not a good conductor of electricity because :
Which is/are the characteristic(s) of Diamond?
Two adjacent layers in graphite are bonded by comparatively _______ forces.
Crystalline fullerene has __________ properties.
Density of graphite is :
The most stable fullerene is :
The first fullerene was discovered in :
The most common fullerene is $C {60}$. 60 C-atoms are arranged in _____ pentagons and ______ hexagons.
Chemically, diamond is :
Which of the following statement is true for graphite?
(a) In graphite, each carbon atom is bonded to four other carbon atoms.
(b) Graphite is very hard.
(c) It is a good conductor of electricity.
(d) It is bad conductor of electricity.
Which of the following substance consists of only one element?
The allotrope of carbon which is a good conductor of heat and electricity is:
Rhombic and monoclinic sulphur are:
The allotrope of carbon used in nuclear reactor is :
Some elements show the property of existing in two or more distinct physical form which show different physical properties but same chemical properties. These distinct forms of an element are called :
An allotropic form of carbon used for cutting and drilling is which of the following?
The allotrope of carbon used in nuclear reactor is:
Graphite is a ______ conductor of electricity whereas diamond is a ______ conductor of electricity.
Some elements show the property of existing in two or more distinct physical form which shows different physical properties but same chemical properties. These distinct forms of an element are called:
Due to the weak Van der Waals' forces and less distance between the layers, graphite :
(i) It is used in making leads of pencils.
(ii) It is used as dry lubricant.
(iii) It is used in making black paint and printers ink.
(iv) It is used in nuclear reactors as moderator.
Which is this substance?
Carbon can form a maximum of _____ bonds.
Which of the following can conduct electricity in the solid state ?
Which one has an allotrophic form that is a good electrical conductor at standard conditions ?
Which of the following element's allotrop is the primary absorber of UV solar radiation in Earth's atmosphere ?
In which of the given pairs the two compounds are allotropes of the same element?
The number of free electrons in the outermost shell of carbon in graphite is:
Select the correct statement.
Which of the following statements is/are correct?
(1) Graphite is used in making electrodes because it can conduct electricity.
(2) Graphite is used as a solid lubricant.
(3) Graphite is used in the manufacture of crucibles.
(4) Graphite is also known as black lead.