Advertisements
Advertisements
Question
Select the appropriate option for the following statement:
The element which is a noble metal.
Options
Boron
Chlorine
Potassium
Platinum
Radon
Solution
Platinuma.
APPEARS IN
RELATED QUESTIONS
Explain the meaning of malleable.
Fill in the blanks:
Metals are ________ conductors of heat and _________.
Write a balanced chemical equation for the reaction of zinc with potassium hydroxide solution.
Name one metal which is stored in kerosene oil.
Name one property which is characteristic of non-metals.
State any five physical properties of non-metals.
The noble gas used in advertising signboards is
Statements given below are incorrect. Write the correct statements :
Soda water is prepared by dissolving washing soda in water.
Tick (√) the most appropriate answer.
Copper metal is used in :
Name a non-metal whose compounds help in the growth of plants.
Define metal and non-metal on the basis of electron loss or gain.
Name:
a non metal which conducts electricity
Explain how the activity series accounts for the following:
occurrence of metals
Give a short account of heating effect on metal carbonates based on the activity series ?
Give the effect of heat on metal oxides based on the activity series ?
How many valence electrons are present in:
(i) metals and
How are metals like sodium, potassium, and calcium obtained? Give equations.
Give the common name and chemical name of an ore of:
(a) zinc (b) aluminium (c) iron.
Give a reason why – properties of metals are related to their activity or reactivity series of metals. Explain the same with reference to potassium and iron in the series.
Give reason for the following:
Potassium reacts vigorously with cold water while copper does not react with water or steam.