1
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following properties is not true for graphite?
A
Hybridisation of each carbon atom is sp3
B
Hybridisation of each carbon atom is sp2
C
Electrons are delocalised over the whole sheet of atoms
D
Each layer is composed of hexagonal rings
2
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following is the purest form of carbon?
A
Charcoal
B
Coke
C
Fullerene
D
Carbon black
3
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The poisonous nature of carbon monoxide (CO) is due to its
A
insolubility in water
B
ability to form a complex with haemoglobin
C
ability to reduce some metal oxides
D
property of having one $$\sigma$$-bond
4
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Which one of the following alkali metals has lowest melting point?
A
Sodium
B
Potassium
C
Rubidium
D
Caesium
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12