Advertisements
Advertisements
प्रश्न
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
विकल्प
Mg
Na
P
Ca
Advertisements
उत्तर
Na
Explanation -
Sodium is a third-period alkali metal which is a soft metal and highly reactive. sodium is stored under kerosene and whenever it comes in contact with air or water it reacts vigorously.
APPEARS IN
संबंधित प्रश्न
What do you call the compounds having the same molecular formula but different structural arrangements of atoms?
What type of bond is present in the following molecule?
CH4
Explain why:
Covalent compounds have generally low melting points.
How is buckminsterfullerene related to diamond and graphite?
Explain why, ionic compounds conduct electricity in solution whereas covalent compounds do not conduct electricity.
How will you find out which of the water soluble compound A or B is ionic?
Explain why, diamond is hard while graphite is soft (though both are made of carbon atoms).
Which element exhibits the property of catenation to maximum extent and why?
Draw an electron dot structure of the following molecule. (Without showing the circle) :
Water
Write answer as directed.
What causes the existance of very large number of carbon compound ?
(a) Compound X consists of molecules.
Choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d) given below
X is likely to have a :
The electronic configuration of N2 is 2, 5. How many electrons in the outer shell of a N atom are not involved in the formation of a nitrogen molecule?
Explain the bonding in methane molecule using electron dot structure.
State the type of bonding in the following molecule.
Water
The molecular masses of a carbon compound spread over a range of _______.
Cation is formed when ______.
A molecule of ammonia (NH3) has
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
Non-polar covalent compounds are ______ conductors of heat and electricity.
