Methane is often referred to as "marsh gas" because it is commonly produced in marshy areas. In these environments, organic matter decays anaerobically, leading to the release of methane gas. The name "marsh gas" highlights its association with the natural decomposition of organic material in wet, marshy conditions.
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Find the odd man out: Cotton, Silk, Proteins, Wool
Protiens
Question Explanation:
Proteins. Proteins are carbonaceous nutrients while rest all are natural fibres.
2/27
Carbon dioxide gas is not used in …...........
Glass cutting
3/27
Which important element is a major component of proteins and is essential for life processes?
Nitrogen
Question Explanation:
Nitrogen is an essential element in proteins, playing a crucial role in various life processes.
4/27
Melting point of methane is …........
–182.5ºC
5/27
Molecular mass of methane is
16
6/27
Wohler, a German scientist synthesized the compound ….......from an inorganic compound ammonium cyanate
urea
7/27
Find the odd man out: Propane, Methane, Ethene, Pentane.
Ethene
Question Explanation:
Ethene. It is an unsaturated hydrocarbon with double bond between two carbon atoms while rest are saturated hydrocarbons with single bond between two carbon atoms.
8/27
Find the odd man out: Diamond, Fullerene, Graphite, Methane.
Methane
Question Explanation:
Methane. It is a marsh gas while rest are allotropes of carbon.
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H2C = CH2 is …....
Ethene
10/27
Find the odd man out: Peat, Charcoal, Lignite, Bituminous
Charcoal
Question Explanation:
Charcoal. Charcoal is a non-crystalline form of carbon while rest all are types of coal
11/27
Methane is ….............
CH4
12/27
Melting point of CO2 is …..............
–56.6ºC
13/27
What is the atomic number of carbon?
6
Question Explanation:
The atomic number of carbon is 6, indicating the number of protons in its nucleus.
14/27
Covalent compounds have …..........
low melting point
15/27
Find the odd man out: Lubricants, Electrodes, Ornaments, Arc Lamps
Ornaments
Question Explanation:
Ornaments. Ornaments are made from diamonds while rest all are made from graphite.
16/27
Melting point of diamond is
3500ºC
17/27
…........... coal contains highest percentage of carbon
Anthracite
18/27
Carbon has 4 valence electrons in its outermost shell, hence it is .
tetravalent
Question Explanation:
Carbon is tetravalent, meaning it forms four covalent bonds in its compounds, due to its atomic structure. Carbon has four valence electrons in its outer shell, and it needs to share electrons with other atoms to achieve a stable, octet configuration. By forming four covalent bonds, carbon can complete its outer shell with eight electrons, resembling the stable configuration of noble gases. This tetravalent nature allows carbon to create a diverse range of organic compounds with various structures and properties.
19/27
…........ is not a property of carbon dioxide gas.
Supporting combustion
20/27
Which allotrope of carbon is used as a lubricant and is an excellent conductor of electricity?
Graphite
Question Explanation:
Graphite is the allotrope of carbon used as a lubricant and possesses excellent conductivity due to its layered structure.
21/27
Weight of Kohinoor Diamond was …..........
186 carats
22/27
In which form does carbon dioxide exist in the atmosphere?
Gas
Question Explanation:
Carbon dioxide exists in the atmosphere primarily as a gas, contributing to the greenhouse effect.
23/27
Biogas contains about …........ of methane.
55% to 60%
24/27
Ethane with molecular formula C2H6 has …......... covalent bonds.
Seven
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What is the valency of carbon in most of its compounds?
4
Question Explanation:
Carbon typically exhibits a valency of 4, forming covalent bonds in most of its compounds.
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Find the odd man out: Coal, Petroleum, Natural gas, Cotton
Cotton
Question Explanation:
Cotton. Cotton is a natural fibre while rest all are fossil fuels.
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