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Question-1
Sodium burns in air and gives
(A)
Na
3
N
(B)
NaO
2
(C)
NaO
(D)
Na
2
O
2
Question-2
Which of the following is most stable towards heat?
(A)
BaCO
3
(B)
BeCO
3
(C)
CaCO
3
(D)
SrCO
3
Question-3
What is obtained when cesium reacts with oxygen?
(A)
CsO
(B)
Cs
2
O
(C)
CsO
2
(D)
Cs
2
O
2
Question-4
Which of the following compound of sodium, on heating evolves CO
2
?
(A)
NaHCO
3
(B)
Na
2
CO
3
.H
2
O
(C)
Na
2
CO
3
.7H
2
O
(D)
Na
2
CO
3
.10H
2
O
Question-5
Which of the following halide has the highest melting point?
(A)
LiI
(B)
LiF
(C)
LiCl
(D)
LiBr
Question-6
The essential raw materials used in the manufacture of portland cement are
(A)
lime stone and clay
(B)
lime stone and gypsum
(C)
lime stone, gypsum and sand
(D)
lime stone, gypsum and alumina
Question-7
The melting point of calcium halides decreases in the order
(A)
CaF
2
> CaCl
2
> CaBr
2
> CaI
2
(B)
CaCl
2
>
CaF
2
> CaBr
2
> CaI
2
(C)
CaI
2
>
CaBr
2
>
CaF
2
> CaCl
2
(D)
CaI
2
>
CaBr
2
> CaCl
2
>
CaF
2
Question-8
Which of the following is formed when Mg reacts with dilute HCl?
(A)
MgH
2
(B)
MgCl
(C)
MgCl
2
(D)
Mg
2
Cl
2
Question-9
Calcium decomposes water and liberates
(A)
O
2
(B)
H
2
(C)
CaO
(D)
CaO
2
Question-10
Which of the following compound of an alkaline earth metal is extremely hard?
(A)
Be
(B)
Mg
(C)
Sr
(D)
Ca
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Plus 1 Biology Science
Kerala (English Medium)
Practice in Related Chapters
Structure of Atom
Classification of Elements and Periodicity in Properties
Some Basic Concepts Of Chemistry
Comparitive Study of Elements
The s-Block Elements
Redox Reactions
Hydrogen
Equilibrium
Chemical Bonding and Molecular Structure
States of Matter
Thermodynamics
The p-Block Elements
Organic Chemistry - Some Basic Principles and Techniques
Boron Family
Carbon Family
oxygen Family
Classification of Elements & Periodicity
Environmental Chemistry
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