MEDIUM
Earn 100

Which of the following option is not allotropes of carbon ?

50% studentsanswered this correctly

Important Questions on Sets, Relations and Functions

MEDIUM
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
Choose the correct statement:
MEDIUM
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
The INCORRECT statement regarding the structure of C60 is :
MEDIUM
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
Diamond is extremely hard whereas graphite is soft. This is because
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
If A={x|x∈N,x is a prime number less than 12} and B={x|x∈N , x is factor of 10}, then A∩B=…
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
The C-C bond length is maximum in:
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
Let A={ 1,2,3,4,5,6,7,8,9,10 }. Then the number of subsets of A containing two or three elements is
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
The number of six membered and five membered rings in Buckminster Fullerence respectively is
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
If A⊂B, then AΔB is equal to
MEDIUM
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
The number of pentagons in C60 and trigons (triangles) in white phosphorus, are;
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
In diamond, the hybridization of each carbon atom is
HARD
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
In an examination 51% students fail in English and 45% fail in Maths. If 21%students fail in both the subjects, then 169 students pass the examination. What is the total number of students taking the exam?
 
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
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.
MEDIUM
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
In a group of boys, 25 play volleyball, 20 play badminton and 10 boys play cricket. Five boys play all the three games. 8 boys play atleast two of the three games. How many of them play only one game? 
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
How many five-membered and six-membered rings are present in a buckmisterfullerene C60?
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
Two finite sets have m and n elements. The number of subsets of the first set is 112 more than that of the second. The values of m and n are respectively
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
A survey shows that 73% of the persons working in an office like coffee, whereas 65% like tea. If x denotes the percentage of them, who like both coffee and tea, then x cannot be:
MEDIUM
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
A survey shows that 63% of the people in a city read newspaper A whereas 76% read news paper B. If  x% of the people read both the newspapers, then a possible value of x can be:
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations

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
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
C60, an allotrope of carbon contains
EASY
Mathematics>Algebra>Sets, Relations and Functions>Sets and Relations
What is the hybridization of carbon atoms in fullerene?