Advertisements
Advertisements
Question
Although metals form basic oxides, which of the following metals form an amphoteric oxide?
Options
Na
Ca
Al
Cu
Advertisements
Solution
Al
Explanation -
Out of all the given options, aluminium forms an amphoteric oxide Al2O3, which can both act as an acid or a base.
APPEARS IN
RELATED QUESTIONS
What would be the electron dot structure of carbon dioxide which has the formula CO2?
Give appropriate scientific reasons for Carbon tetrachloride does not conduct electricity.
Friedrich Wohler converted an inorganic compound into an organic compound in the laboratory.
Write the name and formula of organic compound formed.
Give the formula of the compound that would be formed by the combination of the following pair of elements:
K and H
Explain why, graphite can be used as a lubricant but diamond cannot.
The atomic numbers of four elements P, Q, R and S are 6, 10, 12 and 17 respectively. Which two elements can combine to form a covalent compound?
(a) P and R
(b) Q and S
(c) P and S
(d) R and S
A saturated hydrocarbon has fifty hydrogen atom in its molecule. The number of carbon atoms in its molecule will be
(a) twenty five
(b) twenty four
(c) twenty six
(d) twenty seven
Give the characteristic properties of covalent compounds.
Draw an electron dot diagram for the formation of the following. State the type of bonding present in them.
Hydroxyl ion
An element L consists of molecules.
Why L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?
What are the term defined below?
A bond formed by share pair of electrons, each bonding atom contributing one electron to the pair.
What is the difference between a polar covalent compound and a non-polar covalent compound?
Name two compounds that are covalent when taken pure but produce ions when dissolved in water.
In the formation of electrovalent compounds, electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound?
Define the functional group and complete the following table.
| S.I. No. | Functional Group | Compound | Formula |
| (1) | ______________ | _______________ |
C2H5OH |
| (2) | _______________ | _______________ | CH3CHO |
Write an Explanation.
Alkyne
Write a short note.
Aromatic hydrocarbons
List two differences between the properties exhibited by covalent compounds and ionic compounds.
Identify the incorrect statement and correct them.
- Like covalent compounds, coordinate compounds also contain charged particles (ions). So they are good conductors of electricity.
- Ionic bond is a weak bond when compared to Hydrogen bond.
- Ionic or electrovalent bonds are formed by mutual sharing of electrons between atoms.
- Loss of electrons is called Oxidation and gain of electron is called Reduction.
- The electrons which are not involved in bonding are called valence electrons.
Two carbon atoms can always form one or two covalent bonds.
