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प्रश्न
What is the difference between ionic compounds and polar covalent compounds?
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उत्तर
Ionic compound:
- They usually have high melting points and boiling points.
- They are soluble in water. (NaCl)
- They often conduct electricity in a molten state.
- They are usually crystalline solids.
Polar covalent compound:
- Atoms do not have an equal distribution of shared electron pairs.
- They ionise in water.
- They are not electrically neutral.
- Bond is formed between dissimilar atoms such as H2O, NH3, HCl.
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संबंधित प्रश्न
Write structural formula of Methane.
Why covalent compounds are different from ionic compounds?
Explain the nature of the covalent bond using the bond formation in CH3Cl.
You can buy solid air-freshners in shops. Do you think these substances are ionic or covalent? Why?
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.
Explain the following:
Polar covalent compounds are good conductors of electricity.
Choose the correct answer from the options given below
Which one is not example of polar covalent compound?
Complete the following activity.
Write the names of the hydrocarbons for the following structural formula.
(isobutylene, cyclohexane, propene, cyclohexene, cyclopentane, benzene, propyne, isobutane, propane)
| \[\begin{array}{cc}\phantom{......}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\ \phantom{.....}|\phantom{....}|\phantom{....}|\\ \ce{H - C - C = C}\\\phantom{.....}|\phantom{.........}|\\ \phantom{.....}\ce{H}\phantom{........}\ce{H}\end{array}\] |
Give an example for each of the following statement
A compound in which two Covalent bonds are formed.
The table shows the electronic structures of four elements.
| Element | Electronic Structure |
| P | 2, 6 |
| Q | 2, 8, 1 |
| R | 2, 8, 7 |
| S | 2, 8, 8 |
- Identify which element(s) will form covalent bonds with carbon.
- “Carbon reacts with an element in the above table to form several compounds.” Give suitable reason.
