Question 5 :
Which one of the following metals is the most reactive and stored in kerosene?
Question 6 :
Name the gas evolved when magnesium reacts with dilute hydrochloric acids.
Question 7 :
The metal which is not corroded by air, water and acid is.
Question 13 :
Out of these, which one is more reactive with water?
(a)
(b)
(c)
(d)
Question 15 :
A mineral from which. a metal can be extracted on the commercial scale, economically is called.
Question 20 :
Both …………. and …………. find extensive use in the native form as well as compounds.
Question 24 :
Which of the following metals catch fire on reaction with air?
Question 25 :
When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is ___ in nature.
Question 26 :
Which of the following metals does not react even with steam.?
Question 27 :
Identify the non-metal which exists in a liquid state in room temperature 25∘C.
Question 28 :
Which of the following pairs of compounds undergo displacement reaction when they react with each other?
Question 29 :
A reaction in which a more reactive metal replaces a less reactive metal from its salt solution is called a/an ________ reaction.
Question 30 :
Food cans are coated with tin and not with zinc because:
Question 31 :
Metals, except Al and Zn, react with oxygen to form _______ oxides.
Question 32 :
When sulphur reacts with oxygen, the oxide formed is ___ in nature.
A.
B.
C.
D.
Question 33 :
Metals like zinc and aluminium react with sodium hydroxide to produce ____ gas.
Question 34 :
When zinc reacts with dilute sulphuric acid, a salt is formed with the release of a gas. The gas produced during this puts off a burning candle with a pop sound. The gas evolved during this reaction is:
Question 35 :
The property by which metals can be beaten into sheets is known as ___
Question 36 :
The property of metal by which it can be drawn into wires is called _____.
Question 43 :
Sodium metal is dipped in which of the following substances for storage?
Question 44 :
Which of the following order is correct for the reactivity of metals?
Question 50 :
Which of the following metals are soft enough to be even cut with a knife?