Advertisements
Advertisements
Question
_______ is the least reactive metal.
Options
silver
sodium
zinc
gold
Advertisements
Solution
Gold is the least reactive metal.
APPEARS IN
RELATED QUESTIONS
Define the Ore.
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
Give the name and chemical formula of one ore of copper.
An important ore of zinc metal is:
(a) calamine
(b) cuprite
(c) pyrolusite
(d) haematite
Which of the following is an ore of mercury metal?
(a) rock salt
(b) cinnabar
(c) calamine
(d) haematite
During galvanisation, iron metal is given a thin coating of one of the following metals. This metal is:
(a) chromium
(b) tin
(c) zinc
(d) copper
Give reasons, why aluminum is used in:
making alloys
Give reasons, why aluminum is used in:
In aluminiothermy
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
Define the term:
Flux
Complete the incomplete statement with missing words:
Metals are ______ while non-metals are ______ conductors of heat.
Name : The metal which is liquid at room temperature.
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
Answer the following question:
Carbon cannot reduce the oxides of sodium, magnesium, and aluminum to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
Find the odd one out and give its explanation.
Identify who I am!
Ore of Aluminum- ______
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
Which of the statements about the reaction, \[\ce{ZnO + CO -> Zn + CO2}\] is correct?
Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.
