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This Test Contains Questions from CHEMISTRY PART 2 # CH 3.
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Boric acid is not used
Which of the followings is not common property of group IV-A elements?
Sodium silicate is a useful compound of silicon. Which statement is false?
Which metal is used in the thermit process because of its activity?
Which element form an ion with charge 3+?
Tincal is a mineral of
The formula of orthoboric acid is
The oxides of B and Si are
Which of the following Group IV-A oxides cannot be formed by direct combination of the element and oxygen?
Which of the following oxides of elements in Group lV-A is the most acidic character?
The most abundant element in the earth’s crust is
Diamond and graphite are
Boric acid cannot be used
Which of the following mineral does not contain Al?
Which metal is protected by a layer of its own oxide?
In which of the following elements +1 oxidation state is more stable than +3
Alum is not used
Al is more reactive than Fe but Al is less easily corroded than Fe because
Which of the following is most abundant in the earth’s crust?
BF3 acts as acid according to the concept of
The aqueous solution of potash alum is
Galena is an ore of
The principle constituent of white lead is
Red lead is
In the manufacture of cement which of the following is used?
Freon-12 is used as a
The percentage of lead in lead pencil is
Bauxite is a mineral used for the extraction of
An aqueous solution of borax is
The inert pair effect is most prominent in
Which of the following elements has the highest melting point
Which is the chief ore of Aluminum
When boric acid is reacted with NaOH or Na2CO3 the product formed is
When aluminium is heated with carbon up to 2000°C, it forms aluminium carbide whose formula is
The most reactive allotropic form of carbon is
Carbon reacts with metals to form
Nature of chemical bonding in diamond is
Which of the f&lowing elements does not show allotropy
Two & more forms of the same element which differ in the arrangement of atoms in the crystal lattice are called
Oxide of an element is a gas & it dissolves in water to give an acid. The element in the Periodic table exists in the group
Yellow lead monoxide is also known as
[2PbCO3.Pb(OH)2] is the composition of
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