Advertisements
Advertisements
प्रश्न
Write the electron-dot structures for sodium, oxygen and magnesium.
Advertisements
उत्तर
| Sodium | (2, 8, 1) | \[\ce{\overset{\bullet}{Na}}\] |
| Oxygen | (2, 6) |
\[\begin{array}{cc} |
| Magnesium | (2, 8, 2) |
\[\begin{array}{cc} |
APPEARS IN
संबंधित प्रश्न
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Differentiate between metal and non-metal on the basis of their chemical properties.
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
Write equation for the reaction of magnesium with oxygen.
Fill in the following blank with suitable word:
Magnesium liberates ............... gas on reacting with hot boiling water.
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
What type of oxides are formed when non-metals react with oxygen? Explain with an example.
Give one example, with equation, of the displacement of hydrogen by a metal from an acid.
What happens when a metal reacts with dilute hydrochloric acid? Explain with the help of an example.
Name one metal more reactive and another less reactive than hydrogen.
Name one metal which displaces silver from silver nitrate solution and one which does not.
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
Which one among the following is an acidic oxide?
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reaction involved.
