Advertisements
Advertisements
Question
State one use of diamond which depends on its 'extraordinary brilliance' and one use of graphite which depends on its being 'black and quite soft'.
Advertisements
Solution
1. Diamonds are used in making jewellery because of their extraordinary shine and texture.
2.Graphite is used in making pencil leads (black core of pencils) because of its black colour and softness.
APPEARS IN
RELATED QUESTIONS
Name a carbon containing molecule which has two double bonds.
What type of chemical bond is formed between carbon and bromine?
What type of bonds are present in methane (CH4) and sodium chloride (NaCl)?
What type of bonds are present in CH4 molecule? Draw their electron-dot structures.
Fill in the following blank with suitable word:
The general formula CnH2n for cycloalkanes is the same as that of ...........
Give one example, state what are covalent compounds?
How buckminsterfullerene is it related to diamond and graphite?
Give two general properties of ionic compounds and two those of covalent compounds.
State one test by which sodium chloride can be distinguished from sugar.
Give the formula of the compound that would be formed by the combination of the following pair of elements:
K and H
Why is graphite a good conductor of electricity but diamond is a non-conductor of electricity?
The electronic configurations of three elements X, Y and Z are as follows:
| X | 2, 4 |
| Y | 2, 7 |
| Z | 2, 1 |
(a) Which two elements will combine to form an ionic compound?
(b) Which two elements will react to form a covalent compound?
Give reasons for your choice.
Give two example in following case:
Gaseous polar compounds
Observe the straight chain hydrocarbons given below and answer the following
questions :
i) Which of the straight chain compounds from A and B is saturated and unsaturated straight chains?
ii) Name these straight chains.
iii) Write their chemical formulae and number of – CH2 - units.

Choose and write the correct option.
Which type of carbon-carbon bonds are present in Vanaspati ghee?
Element A has 2 electrons in its M shell. Element B has atomic number 7.
If B is a diatomic gas, write the equation for the direct combination of A and B to form a compound.
Draw the electron dot structure of covalent compound methane (non polar) and HCL (polar) and give two difference between them.
Write a short note.
Aromatic hydrocarbons
The correct structural formula of butanoic acid is -
In covalent compounds, the bond is formed due to ______ of electrons.
