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The carbons in two-dimensional graphene are hybridized.

A sp    B sp2    C sp3

Enter your answer as A, B or C.

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Important Questions on p-Block Elements - I

EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
White phosphorus, when heated with conc. NaOH solution in an inert atmosphere of CO2, forms phosphine and a sodium salt of oxoacid of phosphorus, 'X'. The oxidation state of phosphorus in 'X' is
EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
In diamond, the hybridization of each carbon atom is
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
White phosphorous P4 has the following characteristics
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
The element that does not show catenation is
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
Diamond is extremely hard whereas graphite is soft. This is because
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
Which among the group -15 elements does NOT exist as tetra atomic molecule?
EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
The P-P-P bond angle in white phosphorus is
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
An allotrope of carbon which exhibits only two types of C-C bond distance of 143.5 pm and 138.3 pm, is
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
Choose the correct statement:
EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Match list-I with List-II :

List - I List - II
A. Coke I. Carbon atoms are sp3 hybridised
B. Diamond II. Used as dry lubricants
C. Fullerene III. Used as a reducing agent
D. Graphite IV. Cage like molecules

Choose the correct answer from the options given below:

EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
The basic structural unit of feldspar, zeolites mica, and asbestos is:
EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
What is the hybridization of carbon atoms in fullerene?
EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
Identify the correct statements from the following:
(a) CO2g is used as a refrigerant for ice cream and frozen food.
(b) The structure of C60 contains twelve six-membered carbon rings and twenty-five membered carbon rings.
(c) ZSM−5, a type of zeolite, is used to convert alcohols into gasoline.
(d) CO is a colourless and odourless gas.
EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
The element that does NOT exhibits allotropy is-
EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
Identify the correct statements
I) Germanium exists only in traces.
II) The order of electronegativity of Si, Ge, Sn is Sn>Ge>Si
III) All group 14 elements are available in solid state
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
Mention any three uses of silicones.
MEDIUM
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
Zeolites are shape selective structures because of
HARD
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound X.X on acidification with HCl gives compound Y. The basicity of compound Y is:
EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Identify the correct statements regarding fullerene.

i. It has 60 vertices.
ii. All the carbon atoms are in the sp3 hybridisation.
iii.The number of rings having six carbons each is 20 and the number of rings having five carbons each is 12.
iv.  All the C-C bond lengths in it are equal.

EASY
Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements
Assertion: Among the carbon allotropes, diamond is an insulator, whereas, graphite is a good conductor of electricity.

Reason: Hybridization of carbon in diamond and graphite are sp3 and sp2 respectively.