English Medium Class 10 - CBSE Question Bank Solutions

Which of the following statements are usually correct for carbon compounds? These

1. are good conductors of electricity
2. are poor conductors of electricity
3. have strong forces of attraction between their molecules
4. do not have strong forces of attraction between their molecules.

Cation is formed when ______.

The I.U.P.A.C name of CH₃CH₂CH = CH₂ is?

Which of the following compounds of carbon does not consist of ions?

Which of the following statements are correct for carbon compounds?

1. Most carbon compounds are good conductors of electricity.
2. Most carbon compounds are poor conductors of electricity.
3. Force of attraction between molecules of carbon compounds is not very strong.
4. Force of attraction between molecules of carbon compounds is very strong.

Which of the following is the formula of Butanoic acid?

An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following

Although metals form basic oxides, which of the following metals form an amphoteric oxide?

A molecule of ammonia (NH₃) has

Which of the following are correct structural isomers of butane?

1. \[\begin{array}{cc}
   \ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
   |\phantom{....}|\phantom{....}|\phantom{....}|\\
   \ce{H - C - C - C - C - H}\\
   |\phantom{....}|\phantom{....}|\phantom{....}|\\
   \ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
   \end{array}\]
   
   
2. \[\begin{array}{cc}
   \ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
   |\phantom{....}|\phantom{....}|\\
   \ce{H - C - C - C - H}\\
   |\phantom{.....}|\phantom{.....}|\\
   \ce{H}\ce{H-C-H}\ce{H}\\
   |\\
   \ce{H}\\
   \end{array}\]
3. \[\begin{array}{cc}
   \ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
   |\phantom{....}|\phantom{....}|\\
   \ce{H - C - C - C - H}\\
   |\phantom{.....}\backslash\phantom{..}|\\
   \phantom{....}\ce{H}\phantom{......}\ce{C - H}\phantom{}\\
   \phantom{.......}|\\
   \phantom{.......}\ce{H}\\
   \end{array}\]
4. \[\begin{array}{cc}
   \ce{H}\phantom{...}\ce{H}\\
   |\phantom{....}|\\
   \ce{H - C - C - H}\\
   |\phantom{....}|\\
   \ce{H - C - C - H}\\
   |\phantom{....}|\\
   \ce{H}\phantom{...}\ce{H}\\
   \end{array}\]

`"CH"_3 - "CH"_2 - "OH" overset("Alkaline""KMnO"_4 + "Heat")(->) "CH"_3 - "COOH"`

In the above given reaction, alkaline KMnO₄ acts as 

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of

The correct structural formula of butanoic acid is

Mineral acids are stronger acids than carboxylic acids because

1. mineral acids are completely ionised
2. carboxylic acids are completely ionised
3. mineral acids are partially ionised
4. carboxylic acids are partially ionised

Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of

The table shows the electronic structures of four elements. 

1.  Identify which element(s) will form covalent bonds with carbon.
2. “Carbon reacts with an element in the above table to form several compounds.” Give suitable reason.

"Carbon prefers to share its valence electrons with other atoms of carbon or with atoms of other elements rather than gaining or losing the valence electrons in order to attain noble gas configuration." Give reasons to justify this statement.

State the reasons, why carbon cannot

1. Lose four electrons to form C⁴⁺ cation and
2. Gain four electrons to form C^4- anion.

How does carbon overcome this problem to form compounds?

Assertion (A): Melting point and boiling point of ethanol are lower than that of sodium chloride.

Reason (R): The forces of attraction between the molecules of ionic compounds are very strong.

A compound which is prepared from gypsum has the property of hardening when mixed with water. identify the compound and write its formula. How is this compound prepared? Describe it in the form of a chemical equation only.