Advertisements
Advertisements
Question
Write the electron-dot structures for sodium, oxygen and magnesium.
Solution
Sodium | (2, 8, 1) | \[\ce{\overset{\bullet}{Na}}\] |
Oxygen | (2, 6) |
\[\begin{array}{cc} |
Magnesium | (2, 8, 2) |
\[\begin{array}{cc} |
APPEARS IN
RELATED QUESTIONS
_________ solution is blue in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Name the following:
Metals which forms an amphoteric oxide.
Differentiate between metal and non-metal on the basis of their chemical properties.
A solution of _________________ in water is green in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
State whether the following statement is true or false:
Non-metals react with dilute acids to produce a gas which burns with a 'pop' sound.
Write equation for the reaction of magnesium with oxygen.
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
What happens when magnesium reacts with very dilute nitric acid? Write an equation for the reaction involved.
Name two metals which cannot displace hydrogen from dilute acids.
What is the action of water on magnesium ? Write equation of the chemical reaction involved.
You are given samples of three metals − sodium, magnesium and copper. Suggest any two activities to arrange them in order of their decreasing reactivities.
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
(d) a neutral oxide
An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag
Metal A burns in air, on heating, to form an oxide A2O3 whereas another metal B burns in air only on strong heating to form an oxide BO. The two oxides A2O3 and BO can react with hydrochloric acid as well as sodium hydroxide solution to form the corresponding salts and water.
(a) What is the nature of oxide A2O3?
(b) What is the nature of oxide BO?
(c) Name one metal like A.
(b) Name one metal like B.
If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
Choose the correct alternative and rewrite the following:
Which of the following is lue in colour?
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?