-
question_answer1)
The most abundant metal in the earth's crust is -
A)
iron done
clear
B)
copper done
clear
C)
aluminium done
clear
D)
mercury done
clear
View Solution play_arrow
-
question_answer2)
The only metal that is liquid at room temperature is -
A)
mercury done
clear
B)
sodium done
clear
C)
zinc done
clear
D)
tungsten done
clear
View Solution play_arrow
-
question_answer3)
Chemically rust is
A)
hydrated ferric oxide only done
clear
B)
hydrated ferrous oxide only done
clear
C)
ferric oxide only done
clear
D)
ferrous oxide only done
clear
View Solution play_arrow
-
question_answer4)
Alumina is chief ore of which of the following metal?
A)
Na done
clear
B)
K done
clear
C)
Ca done
clear
D)
Al done
clear
View Solution play_arrow
-
question_answer5)
Horn silver is
A)
an oxide ore of silver done
clear
B)
a sulphite ore of silver done
clear
C)
a carbonate ore of silver done
clear
D)
a chloride ore of silver done
clear
View Solution play_arrow
-
question_answer6)
Naturally occuring substances from which a metal can be profitably (or economically) extracted are called?
A)
Minerals done
clear
B)
Ores done
clear
C)
Gangue done
clear
D)
Salts done
clear
View Solution play_arrow
-
question_answer7)
Cinnabar is an ore of
A)
Hg done
clear
B)
Cu done
clear
C)
Pb done
clear
D)
Zn done
clear
View Solution play_arrow
-
question_answer8)
Which of the following is not an ore?
A)
Bauxite done
clear
B)
Malachite done
clear
C)
Zinc blende done
clear
D)
Pig iron done
clear
View Solution play_arrow
-
question_answer9)
Which of the following mineral does not contain Al?
A)
Cryolite done
clear
B)
Mica done
clear
C)
Feldspar done
clear
D)
Fluorspar done
clear
View Solution play_arrow
-
question_answer10)
Formula of magnetite is
A)
\[F{{e}_{2}}{{O}_{3}}\] done
clear
B)
\[F{{e}_{{}}}{{S}_{2}}\] done
clear
C)
\[FeC{{O}_{3}}\] done
clear
D)
\[F{{e}_{3}}{{O}_{4}}\] done
clear
View Solution play_arrow
-
question_answer11)
Which ore contains both iron and copper?
A)
Cuprite done
clear
B)
Chalcocite done
clear
C)
Chalcopyrite done
clear
D)
Malachite done
clear
View Solution play_arrow
-
question_answer12)
Calcination is the process of heating the ore
A)
in a blast furnace done
clear
B)
in absence of air done
clear
C)
in presence of air done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer13)
Which of the following is an oxide ore?
A)
Bauxite done
clear
B)
Cuprite done
clear
C)
Haematite done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer14)
Removal of impurities from ore is known as -
A)
crushing and grinding done
clear
B)
concentration of ore done
clear
C)
calcination done
clear
D)
roasting done
clear
View Solution play_arrow
-
question_answer15)
Which reducing agent is used in chemical reduction?
A)
C done
clear
B)
CO done
clear
C)
Al done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer16)
Aluminium is used in thermite welding because -
A)
aluminium is a light metal done
clear
B)
aluminium has more affinity for oxygen done
clear
C)
aluminium is a strong oxidising agent done
clear
D)
aluminium is a reactive metal done
clear
View Solution play_arrow
-
question_answer17)
The process of extraction of metal from its ores, is known as
A)
concentration done
clear
B)
calcination done
clear
C)
purification done
clear
D)
metallurgy done
clear
View Solution play_arrow
-
question_answer18)
The process to heat the ore in the presence of excess supply of air below its melting point is called
A)
roasting done
clear
B)
calcination done
clear
C)
smelting done
clear
D)
liquation done
clear
View Solution play_arrow
-
question_answer19)
Brass is a mixture of
A)
copper and zinc done
clear
B)
copper and tin done
clear
C)
copper, nickel and zinc done
clear
D)
aluminium, copper and traces of Mg and Mn done
clear
View Solution play_arrow
-
question_answer20)
Sodium is obtained by the electrolysis of
A)
an aqueous solution of sodium chloride done
clear
B)
an aqueous solution of sodium hydroxide done
clear
C)
fused sodium chloride done
clear
D)
fused sodium sulphate done
clear
View Solution play_arrow
-
question_answer21)
The chief ore of aluminium is
A)
bauxite done
clear
B)
cryolite done
clear
C)
alunite done
clear
D)
feldspar done
clear
View Solution play_arrow
-
question_answer22)
One of the constituents of amalgam is
A)
aluminium done
clear
B)
copper done
clear
C)
iron done
clear
D)
mercury done
clear
View Solution play_arrow
-
question_answer23)
The metal used to built bridges is
A)
gold done
clear
B)
silver done
clear
C)
platinum done
clear
D)
iron done
clear
View Solution play_arrow
-
question_answer24)
Which of the following is a good conductors of heat and electricity?
A)
Graphite done
clear
B)
Oxygen done
clear
C)
Chlorine done
clear
D)
Nitrogen done
clear
View Solution play_arrow
-
question_answer25)
Metals are
A)
malleable done
clear
B)
ductile done
clear
C)
Both [a] and [b] done
clear
D)
Neither [a] nor [b] done
clear
View Solution play_arrow
-
question_answer26)
Which of the following have low melting and boiling points?
A)
Phosphorus done
clear
B)
Sodium done
clear
C)
Iron done
clear
D)
Both [a] and [b] done
clear
View Solution play_arrow
-
question_answer27)
Which of the following non-metals has shining lustrous surfaces?
A)
Graphite and phosphorus done
clear
B)
Graphite and iodine done
clear
C)
Iodine and phosphorus done
clear
D)
Phosphorus and chlorine done
clear
View Solution play_arrow
-
question_answer28)
Metals like Gold, Platinum which do not easily react are called
A)
active metals done
clear
B)
dull metals done
clear
C)
noble metals done
clear
D)
bright metals done
clear
View Solution play_arrow
-
question_answer29)
The metalloids include the elements
A)
Boron, Silicon done
clear
B)
Arsenic, Antimony done
clear
C)
Germanium, Tellurium done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer30)
Select the property that is associated with non-metals.
A)
Low density done
clear
B)
Low melting point done
clear
C)
Poor conductor of electricity done
clear
D)
All of the above done
clear
View Solution play_arrow
-
question_answer31)
Which of the following non-metals sublimes on heating?
A)
Fluorine done
clear
B)
Chlorine done
clear
C)
Bromine done
clear
D)
Iodine done
clear
View Solution play_arrow
-
question_answer32)
Which of the following statement regarding metals is true?
A)
All metals are solid in nature. done
clear
B)
Metals can be used to make handle of cooking utensils done
clear
C)
Generally most of metals have high melting and boiling points. done
clear
D)
Gold is used generally to make electrical wires. done
clear
View Solution play_arrow
-
question_answer33)
Which of the following statement is false?
A)
Metals are good conductors of heat and electricity. done
clear
B)
Gold, Silver and Zinc are most malleable metals. done
clear
C)
Mercury is the only liquid metal. done
clear
D)
Bromine is the only liquid non-metal. done
clear
View Solution play_arrow
-
question_answer34)
Which of the following statement regarding non-metals is true?
A)
Non-metals are of two types only solids and gases. done
clear
B)
Non-metals reacts with oxygen to form basic oxides generally done
clear
C)
Non-metals are non-lustrous with dull apppearence. Graphite, an allotrope of carbon and iodine have shining lustrous surfaces. done
clear
D)
Non-metals replace hydrogen from acids. done
clear
View Solution play_arrow
-
question_answer35)
Which of the following statements regarding non-metals is false?
A)
11 non-metals are in gaseous state. done
clear
B)
Gas carbon is a good conductor of heat and electricity. done
clear
C)
The black material inside a pencil is metal lead. done
clear
D)
All non-metals are non-sonorous in nature. done
clear
View Solution play_arrow
-
question_answer36)
Consider the following elements: (i) Copper (ii) Gold (iii) Platinum (iv) Silver Which of the above elements exist free in nature?
A)
(i) and(ii) done
clear
B)
(ii) and (iii) done
clear
C)
(i),(ii) and (iv) done
clear
D)
(iii) and (iv) done
clear
View Solution play_arrow
-
question_answer37)
Consider the following statements: Nitrogen is an essential constituent of (i) soils (ii) animals (iii) plants Which of the statements given above is/are correct?
A)
(iii) only done
clear
B)
(i) and (iii) only done
clear
C)
(i) and (ii) only done
clear
D)
(i), (ii) and (iii) done
clear
View Solution play_arrow
-
question_answer38)
When iron is left exposed in open air, it gets rusted. Which constituent(s) of air is /are responsible for rusting iron? (i) Oxygen gas present in air (ii) Moisture present in air (iii) Carbon dioxide gas present in air Select the correct answer using the code given below:
A)
(i) only done
clear
B)
(ii) only done
clear
C)
(i) and (ii) done
clear
D)
(ii) and (iii) done
clear
View Solution play_arrow
-
question_answer39)
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same? (i) Good thermal conductivity (ii) Good electrical conductivity (iii) Ductility (iv) High melting point
A)
(i) and (ii) done
clear
B)
(i) and (iii) done
clear
C)
(ii) and (iii) done
clear
D)
(i) and (iv) done
clear
View Solution play_arrow
-
question_answer40)
Silicon is used in -
A)
solar energy devices done
clear
B)
semiconductors done
clear
C)
transistors done
clear
D)
all of these done
clear
View Solution play_arrow
-
question_answer41)
Which of the following is not a atomic characteristics of metal -
A)
malleable done
clear
B)
electropositive nature done
clear
C)
ductile done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer42)
Pure gold is -
A)
24 carats done
clear
B)
22 carats done
clear
C)
20 carats done
clear
D)
18 carats done
clear
View Solution play_arrow
-
question_answer43)
What is anode mud -
A)
fan of anode done
clear
B)
metal of anode done
clear
C)
impurities collected at anode in electrolysis during purification of metals done
clear
D)
all of these done
clear
View Solution play_arrow
-
question_answer44)
The best mealleable metal is -
A)
aluminium done
clear
B)
silver done
clear
C)
gold done
clear
D)
lead done
clear
View Solution play_arrow
-
question_answer45)
German silver is a mixture of-
A)
copper and zinc done
clear
B)
copper and tin done
clear
C)
copper, nickel and zinc done
clear
D)
aluminium, copper and traces of Mg and Mn. done
clear
View Solution play_arrow
-
question_answer46)
Graphite is a/an -
A)
alloy done
clear
B)
metal done
clear
C)
metalloid done
clear
D)
non-metal done
clear
View Solution play_arrow
-
question_answer47)
Which of the following metals constitutes the alloy magnalium-
A)
Al, Cu done
clear
B)
Al, Fe done
clear
C)
Al. Mg done
clear
D)
Al, Mn done
clear
View Solution play_arrow