Importance of carbon - class-VIII
Description: carbon and its compounds | |
Number of Questions: 18 | |
Created by: Kalki Agrawal | |
Tags: carbon compounds carbon chemistry organic chemistry : some basic principles and techniques carbon and its compounds basic principles of organic chemistry occurrence of carbon compounds in nature carbon- an important element |
The tetrahedral structure of carbon was proposed by__________.
All allotropes of carbon exist in ___________ state at room temperature.
How many triple covalent bonds can a single carbon atom form at a time?
How many double covalent bonds can a single carbon atom form at a time?
The oxidation state of carbon in carbon monoxide is:
Which of the following is not a source of carbon?
Which symbol is used for the element carbon?
Compound with maximum number of $\sigma$-bond:
Carbon has zero oxidation number in
Graphite melts at a high temperature of about:
The reaction between carbon and oxygen can be represented as
$C _{(s)}+O _{2(x)}\rightarrow CO _{2(g)}+heat$
In which of the following type(s), the above reaction can be classified?
I. Combustion reaction
II. Displacement reaction
III. Endothermic reaction
IV. Combination reaction
In the Earth's crust, Carbon is found in the form of_________.
Which of the following is not an allotrope of carbon?
Who has synthesised the organic compound 'urea' for the first time?
An element which is an essential constituent of all organic compounds belongs to the_____group.
Using the given hints, identify the option with correct coal product and its use.
(1)$\;\;$Almost pure form of carbon.