Advertisements
Advertisements
प्रश्न
The number of carbon atoms joined in a spherical molecule of buckminsterfullerene is:
(a) fifty
(b) sixty
(c) seventy
(d) ninety
उत्तर
sixty
The number of carbon atoms joined in a spherical molecule of buckminsterfullerene is 60.
APPEARS IN
संबंधित प्रश्न
What type of chemical bond is formed between carbon and bromine?
What type of bonds are present in H2 molecule? Draw their electron-dot structures.
Give one example of a molecule containing a double covalent bond
Fill in the blank in the following sentence:
In forming N2 molecule, .............. electrons are shared by each atom of nitrogen.
Buckminsterfullerene is an allotropic form of the element:
(a) phoshorus
(b) fluorine
(c) carbon
(d) sulphur
The electronic configurations of two elements A and B are given below:
| A | 2, 6 |
| B | 2, 8, 1 |
(a) What type of chemical bond is formed between the two atoms of A?
(b) What type of chemical bond will be formed between the atoms of A and B?
For each compound mentioned above give the formulae of ions formed in aqueous solution.
Complete the following:
In case of non-polar covalent bond, the covalent bond is formed in the ______ of atoms and shared electrons are ______ distributed. (corner, middle, equally, unequally)
Write answer as directed.
Saturated hydrocarbons are classified into three types. Write these names giving one example each.
The following structural formula belongs to which carbon compound?
Explain the following:
Covalent compounds have low melting and boiling point.
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
The type of bonding in X will be
Acids dissolve in water to produce positively charged ions. Draw the structure of these positive ions.
Define a covalent bond.
The molecular masses of a carbon compound spread over a range of _______.
Write scientific reason.
Carbon has the property of forming many compounds.
Acetic acid was added to a solid X kept in a test tube. A colourless, odourless gas Y was evolved. The gas was passed through lime water, which turned milky. It was concluded that ______.
Mineral acids are stronger acids than carboxylic acids because
- mineral acids are completely ionised
- carboxylic acids are completely ionised
- mineral acids are partially ionised
- carboxylic acids are partially ionised
Non-polar covalent compounds are ______ conductors of heat and electricity.
In covalent compounds, the bond is formed due to ______ of electrons.
