CARBON AND ITS COMPOUND BY SP SINGH

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that:

• The food is not cooked completely

• The fuel is not burning completely

• The fuel is wet

• The fuel is burning completely

Cation is formed when

• Atom gains electrons

• Atom loses electrons

• Proton is lost by the atom

• Atom shares electrons

Which of the following is the molecular formula of cyclobutane?

• C₄H₁₀

• C₄H₆

• C₄H₈

• C₄H₄

The property of self-linkage among identical atoms to form long chain compounds is known

• Superposition

• Catenation

• Isomerisation

• Halogenation

Which of the following statements about graphite and diamond is true?

• They have the same crystal structure

• They have the same degree of hardness

• They have the same electrical conductivity

• They can undergo the same chemical reactions

Which of the followings is the major constituent of the liquefied petroleum gas?

• Ethane

• Methane

• Propane

• Butane

From which of the following substance pencil lead is formed?

• Charcoal

• Wood

• Lead

• Graphite

-Methane is a major constituent of

• CNG

• Bio-gas

• Natural Gas

• All the above

Carbon is

• divalent

• trivalent

• tetravalent

• pentavalent

Covalent bonds

• has low melting and boiling point

• are generally poor conductors of electricity

• has weak inter-molecular forces

• All of the above