-
question_answer1)
Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to [CBSE PMT 1994]
A)
Large size of silicon done
clear
B)
More electropositive nature of silicon done
clear
C)
Availability of low lying d-orbitals in silicon done
clear
D)
Both a and b done
clear
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question_answer2)
The ionic carbide is [JIPMER 2000]
A)
\[ZnC\] done
clear
B)
\[TiC\] done
clear
C)
\[SiC\] done
clear
D)
\[Ca{{C}_{2}}\] done
clear
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question_answer3)
\[Pb{{O}_{2}}\] is [JIPMER 2000]
A)
Basic done
clear
B)
Acidic done
clear
C)
Neutral done
clear
D)
Amphoteric done
clear
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question_answer4)
Lead pipes are not suitable for drinking water because [JIPMER 2000]
A)
A layer of lead dioxide is deposited over pipes done
clear
B)
Lead reacts with air to form litharge done
clear
C)
Lead reacts with water containing air to form \[Pb{{(OH)}_{2}}\] done
clear
D)
Lead forms basic lead carbonate done
clear
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question_answer5)
Silicon dioxide is formed by the reaction of [KCET (Med.) 2001]
A)
\[SiC{{l}_{4}}+2{{H}_{2}}O\] done
clear
B)
\[{{N}_{2}}\] done
clear
C)
\[Si{{O}_{2}}+NaOH\] done
clear
D)
\[SiC{{l}_{4}}+NaOH\] done
clear
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question_answer6)
Which alkali metal carbonate decomposes on heating to liberate \[C{{O}_{2}}\] gas [Pb. PMT 2000]
A)
\[L{{i}_{2}}C{{O}_{3}}\] done
clear
B)
\[CaC{{O}_{3}}\] done
clear
C)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
D)
\[A{{l}_{2}}C{{O}_{3}}\] done
clear
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question_answer7)
Which of the following gives propyne on hydrolysis [AIIMS 2005]
A)
\[A{{l}_{4}}{{C}_{3}}\] done
clear
B)
\[M{{g}_{2}}{{C}_{3}}\] done
clear
C)
\[{{B}_{4}}C\] done
clear
D)
\[L{{a}_{4}}{{C}_{3}}\] done
clear
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question_answer8)
Which one of the following statements is not correct [CBSE PMT 1994]
A)
Zinc dissolves in sodium hydroxide solution done
clear
B)
Carbon monoxide reduces iron (III) oxide to iron done
clear
C)
Mercury (II) iodide dissolves in excess of potassium iodide solution done
clear
D)
Tin (IV) chloride is made by dissolving tin solution in concentrated hydrochloric acid done
clear
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question_answer9)
In laboratory silicon can be prepared by the reaction [Pb. PMT 1999]
A)
By heating carbon in electric furnace done
clear
B)
By heating potassium with potassium dichromate done
clear
C)
Silica with magnesium done
clear
D)
None of these done
clear
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question_answer10)
Which of the following is the correct statement for red lead [AIIMS 2000]
A)
It is an active form of lead done
clear
B)
Its molecular formula is \[P{{b}_{2}}{{O}_{3}}\] done
clear
C)
It decomposes into Pb and \[C{{O}_{2}}\] done
clear
D)
It decomposes into \[Xe{{F}_{6}}\] and \[{{O}_{2}}\] done
clear
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question_answer11)
Suppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which is the best absorbing material for the carbon dioxide [Pb. PMT 2001]
A)
Heated copper oxide done
clear
B)
Cold, solid calcium chloride done
clear
C)
Cold, solid calcium hydroxide done
clear
D)
Heated charcoal done
clear
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question_answer12)
The number and type of bonds between 2 carbon atoms in \[{{N}_{2}}\] [UPSEAT 2001]
A)
One sigma \[(\sigma )\] and one pi\[(\pi )\] bond done
clear
B)
One sigma \[{{O}_{2}}\] and two pi \[(\pi )\] bond done
clear
C)
One sigma \[(\sigma )\] and half pi \[(\pi )\] bond done
clear
D)
One sigma \[C{{O}_{2}}\] bond done
clear
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question_answer13)
Metalloid among the following is [DPMT 2001]
A)
\[Si\] done
clear
B)
\[C\] done
clear
C)
\[Pb\] done
clear
D)
\[Ge\] done
clear
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question_answer14)
?Lead pencil? contains [DPMT 2001; IIT 1990]
A)
\[PbS\] done
clear
B)
Graphite done
clear
C)
\[({{H}_{3}}B{{O}_{3}})\] done
clear
D)
\[Pb\] done
clear
View Solution play_arrow
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question_answer15)
Nitrogen gas is absorbed by [DPMT 2001]
A)
Calcium hydroxide done
clear
B)
Ferrous sulphate done
clear
C)
Calcium carbide done
clear
D)
Aluminium carbide done
clear
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question_answer16)
In laboratory silicon can be prepared by the reaction [Pb. PMT 1999; AFMC 2002]
A)
Silica with magnesium done
clear
B)
By heating carbon in electric furnace done
clear
C)
By heating potassium fluosilicate with potassium done
clear
D)
None of these done
clear
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question_answer17)
Formation of in-numberable compounds of carbon is due to its [RPMT 1999]
A)
High reactivity done
clear
B)
Catenation tendency done
clear
C)
Covalent and ionic tendency done
clear
D)
Different valency done
clear
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question_answer18)
Colour is imported to glass by mixing [Pb. PMT 2002]
A)
Synthetic dyes done
clear
B)
Metal oxide done
clear
C)
Oxides of non-metal done
clear
D)
Coloured salt done
clear
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question_answer19)
Which of the following is insoluble in water [MP PET 2002]
A)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
B)
\[CaC{{O}_{3}}\] done
clear
C)
\[ZnC{{O}_{3}}\] done
clear
D)
\[A{{l}_{2}}{{(C{{O}_{3}})}_{3}}\] done
clear
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question_answer20)
In which of the following the inert pair effect is most prominent [MP PMT 2000]
A)
\[S{{O}_{2}}\] done
clear
B)
\[{{H}_{2}}Se\] done
clear
C)
\[C{{O}_{2}}\] done
clear
D)
\[{{H}_{2}}O\] done
clear
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question_answer21)
Plumbosolvancy implies dissolution of lead in [DCE 1999]
A)
Bases done
clear
B)
Acids done
clear
C)
Ordinary water done
clear
D)
\[CuS{{O}_{4}}\]sol done
clear
View Solution play_arrow
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question_answer22)
Which of the following glass is used in making wind screen of automobiles [AIIMS 1999; Pb. CET 2000]
A)
Crook's done
clear
B)
Jena done
clear
C)
Safety done
clear
D)
Pyrex done
clear
View Solution play_arrow
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question_answer23)
Glass reacts with HF to produce [KCET 2000; CBSE PMT PMT 2000]
A)
\[Si{{F}_{4}}\] done
clear
B)
\[{{H}_{2}}Si{{F}_{6}}\] done
clear
C)
\[{{H}_{2}}Si{{O}_{3}}\] done
clear
D)
\[N{{a}_{3}}Al{{F}_{6}}\] done
clear
View Solution play_arrow
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question_answer24)
The type of glass used in making lenses and prisms is [JIPMER 1999]
A)
A flint glass done
clear
B)
Jena glass done
clear
C)
Pyrex glass done
clear
D)
Quartz glass done
clear
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question_answer25)
When carbon monoxide is passed over solid caustic soda heated to \[{{200}^{o}}\]C, it forms [KCET (Med.) 1999]
A)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
B)
\[NaHC{{O}_{3}}\] done
clear
C)
\[H-COONa\] done
clear
D)
\[C{{H}_{3}}COONa\] done
clear
View Solution play_arrow
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question_answer26)
Which is used to produce smoke screens [AFMC 2005]
A)
Calcium phosphide done
clear
B)
Zinc sulphide done
clear
C)
Sodium carbonate done
clear
D)
Zinc phosphide done
clear
View Solution play_arrow
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question_answer27)
Sodium oxalate on heating with conc. \[{{H}_{2}}S{{O}_{4}}\] gives [Roorkee 2000]
A)
CO only done
clear
B)
\[C{{O}_{2}}\] only done
clear
C)
\[CO\] and \[C{{O}_{2}}\] done
clear
D)
\[S{{O}_{2}}\] and \[S{{O}_{3}}\] done
clear
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question_answer28)
Extraction of lead by reduction methods is done by [AMU 2000]
A)
Adding more galena into reverberatory furnace done
clear
B)
Adding more lead sulphate into reverberatory furnace done
clear
C)
Adding more galena and coke into the reverberatory furnace done
clear
D)
Self reduction of oxide from sulphide present in the furnace done
clear
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question_answer29)
Which gas is used in excess water [BVP 2003]
A)
\[C{{O}_{2}}\] done
clear
B)
\[S{{O}_{2}}\] done
clear
C)
CO done
clear
D)
Water vapours done
clear
View Solution play_arrow
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question_answer30)
The compound which does not possess a peroxide linkage is [JIPMER 1999]
A)
\[N{{a}_{2}}{{O}_{2}}\] done
clear
B)
\[Cr{{O}_{5}}\] done
clear
C)
\[{{H}_{2}}S{{O}_{5}}\] done
clear
D)
\[Pb{{O}_{2}}\] done
clear
View Solution play_arrow
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question_answer31)
Silicon is an important constituent of [MH CET 2001]
A)
Rocks done
clear
B)
Amalgams done
clear
C)
Chlorophyll done
clear
D)
Haemoglobin done
clear
View Solution play_arrow
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question_answer32)
Carborundum is [AFMC 2002; MH CET 2003; BHU 2003, 05]
A)
SiC done
clear
B)
\[AlC{{l}_{3}}\] done
clear
C)
\[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\] done
clear
D)
\[A{{l}_{2}}{{O}_{3}}\,.\,2{{H}_{2}}O\] done
clear
View Solution play_arrow
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question_answer33)
\[{{H}_{3}}P{{O}_{3}}\] gets hydrolysed giving ....... [Orissa JEE 2002]
A)
\[Si{{O}_{2}}\] done
clear
B)
\[Si{{(OH)}_{2}}{{F}_{2}}\] done
clear
C)
\[{{H}_{2}}Si{{F}_{6}}\] done
clear
D)
\[Si{{(OH)}_{4}}\] done
clear
View Solution play_arrow
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question_answer34)
Glass is a [AIEEE 2003; RPET 2003]
A)
Micro-crystaline solid done
clear
B)
Super cooled liquid done
clear
C)
Gel done
clear
D)
Polymeric mixture done
clear
View Solution play_arrow
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question_answer35)
\[{{H}_{2}}{{O}_{2}}\] on reaction with PbS gives [RPET 2003]
A)
\[PbO\] done
clear
B)
\[PbS{{O}_{4}}\] done
clear
C)
\[Pb{{O}_{2}}\] done
clear
D)
\[PbHS{{O}_{4}}\] done
clear
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question_answer36)
Soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to [AIEEE 2004]
A)
A change in the partial pressure of oxygen in the air done
clear
B)
A change in the crystalline structure of tin done
clear
C)
An interaction with nitrogen of the air at very low to temperatures done
clear
D)
An interaction with water vapour contained in the humid air done
clear
View Solution play_arrow
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question_answer37)
Solid \[C{{O}_{2}}\] is known as dry ice, because [Pb. CET 2000]
A)
It melts at \[0{}^\circ C\] done
clear
B)
It evaporates at \[40{}^\circ C\] done
clear
C)
It evaporates at \[-78{}^\circ C\] without melting done
clear
D)
Its boiling point is more than \[199{}^\circ C\] done
clear
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question_answer38)
Which one of the following statements about the zeolites is false [CBSE PMT 2004]
A)
Zeolites are aluminosilicates having three dimensional network done
clear
B)
Some of the \[SiO_{4}^{-4}\]units are replaced by \[AlO_{4}^{-5}\] and \[AlO_{6}^{9-}\] ions in zeolites done
clear
C)
They are used as cation exchangers done
clear
D)
They have open structure which enables them to take up small molecules done
clear
View Solution play_arrow
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question_answer39)
Which of the following cuts ultraviolet rays [AFMC 2004]
A)
Soda glass done
clear
B)
Crooke's glass done
clear
C)
Pyrax done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer40)
In IIIA group, Tl (thalium) shows +1 oxidation state while other members show +3 oxidation state. Why [JEE Orissa 2004]
A)
Presence of lone pair of electron in Tl done
clear
B)
Inert pair effect done
clear
C)
Large ionic radius of \[Tl\] ion done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer41)
Carbon suboxide \[{{C}_{3}}{{O}_{2}}\] has [DCE 2003]
A)
Linear structure done
clear
B)
Bent structure done
clear
C)
Trigonal planar structure done
clear
D)
Distorted tetrahedral structure done
clear
View Solution play_arrow
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question_answer42)
Which of the following is a mixed oxide [Pb. CET 2003]
A)
\[F{{e}_{2}}{{O}_{3}}\] done
clear
B)
\[Pb{{O}_{2}}\] done
clear
C)
\[P{{b}_{3}}{{O}_{4}}\] done
clear
D)
\[Ba{{O}_{2}}\] done
clear
View Solution play_arrow
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question_answer43)
Noble gases are absorbed on [BVP 2004]
A)
Anhydrous \[CaC{{l}_{2}}\] done
clear
B)
Charcoal done
clear
C)
Conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
Coconut done
clear
View Solution play_arrow
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question_answer44)
Lapis lazuli is [AFMC 2004]
A)
Ferrous sulphate done
clear
B)
Copper sulphate done
clear
C)
Sodium alumino silicate done
clear
D)
Zinc sulphate done
clear
View Solution play_arrow
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question_answer45)
Which of the following statement is correct with respect to the property of elements in the carbon family with an increase in atomic number, their [Pb. CET 2002]
A)
Atomic size decreases done
clear
B)
Ionization energy increases done
clear
C)
Metallic character decreases done
clear
D)
Stability of +2 oxidation state increases done
clear
View Solution play_arrow
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question_answer46)
When tin is treated with concentrated nitric acid [DCE 2004]
A)
It is converted into stannous nitrate done
clear
B)
It is converted into stannic nitrate done
clear
C)
It is converted into metastannic acid done
clear
D)
It becomes passive done
clear
View Solution play_arrow
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question_answer47)
Solder is an alloy of [Pb. CET 2003]
A)
\[Pb+Zn+Sn\] done
clear
B)
\[Pb+Zn\] done
clear
C)
\[Pb+Sn\] done
clear
D)
\[Sn+Zn\] done
clear
View Solution play_arrow
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question_answer48)
A metal used in storage batteries is
A)
Copper done
clear
B)
Lead done
clear
C)
Tin done
clear
D)
Nickel done
clear
View Solution play_arrow
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question_answer49)
Name of the structure of silicates in which three oxygen atoms of [SiO4]4- are shared is [IIT 2005]
A)
Pyrosilicate done
clear
B)
Sheet silicate done
clear
C)
Linear chain silicate done
clear
D)
Three dimensional silicate done
clear
View Solution play_arrow
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question_answer50)
Red lead is [CPMT 1972, 74, 94; MNR 1985; DPMT 1982, 2002; Bihar CEE 1995; MP PET 1995]
A)
\[P{{b}_{3}}{{O}_{4}}\] done
clear
B)
\[PbO\] done
clear
C)
\[Pb{{O}_{2}}\] done
clear
D)
\[P{{b}_{4}}{{O}_{3}}\] done
clear
View Solution play_arrow
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question_answer51)
White lead is [CPMT 1983, 93, 2002; MNR 1984; MP PMT 1995; UPSEAT 1999; DCE 2000]
A)
\[PbC{{O}_{3}}\] done
clear
B)
\[PbC{{O}_{3}}.PbO\] done
clear
C)
\[2PbC{{O}_{3}}.\,Pb{{(OH)}_{2}}\] done
clear
D)
\[2PbS{{O}_{4}}.PbO\] done
clear
View Solution play_arrow
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question_answer52)
Lead pipes are corroded quickly by [AFMC 1981]
A)
Dil. \[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
Conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
C)
Acetic acid done
clear
D)
Water done
clear
View Solution play_arrow
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question_answer53)
In silicon dioxide [AIEEE 2005]
A)
Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms done
clear
B)
Each siliocn atom is surrounded by two oxygen atoms and each oxygen atom is bounded to two silicon atoms done
clear
C)
Silicon atom is bonded to two oxygen atoms done
clear
D)
There are double bonds between silicon and oxygen atoms done
clear
View Solution play_arrow
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question_answer54)
Litharge is chemically [DPMT 1984; JIPMER 2001]
A)
\[PbO\] done
clear
B)
\[Pb{{O}_{2}}\] done
clear
C)
\[P{{b}_{3}}{{O}_{4}}\] done
clear
D)
\[Pb{{(C{{H}_{3}}COO)}_{2}}\] done
clear
View Solution play_arrow
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question_answer55)
The element of \[{{s}^{2}}{{p}^{2}}\] configuration is of ..... group
A)
IV done
clear
B)
III done
clear
C)
V done
clear
D)
II done
clear
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question_answer56)
Which of the following compounds of elements in group IV would you expect to be most ionic in character [NCERT 1978]
A)
\[CC{{l}_{4}}\] done
clear
B)
\[SiC{{l}_{4}}\] done
clear
C)
\[PbC{{l}_{2}}\] done
clear
D)
\[PbC{{l}_{4}}\] done
clear
View Solution play_arrow
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question_answer57)
Which of the following compounds of lead is used in match industry
A)
\[PbO\] done
clear
B)
\[Pb{{O}_{2}}\] done
clear
C)
\[PbC{{l}_{2}}\] done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer58)
Type metal is an alloy of \[Pb,\,Sb\]and \[Sn\]. It consists of
A)
Equal amounts of the three metals done
clear
B)
More amount of lead done
clear
C)
More amount of antimony done
clear
D)
More amount of tin done
clear
View Solution play_arrow
-
question_answer59)
Which is correct oxidation state of lead [AFMC 1987]
A)
+ 2, + 4 done
clear
B)
+ 1, + 2 done
clear
C)
+ 3, + 4 done
clear
D)
+ 4 done
clear
View Solution play_arrow
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question_answer60)
Sugar of lead is
A)
\[2PbS{{O}_{4}}.PbO\] done
clear
B)
\[{{(C{{H}_{3}}COO)}_{2}}Pb\] done
clear
C)
\[PbC{{O}_{3}}\] done
clear
D)
\[PbC{{O}_{3}}.Pb{{(OH)}_{2}}\] done
clear
View Solution play_arrow
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question_answer61)
Which of the following compounds has peroxide linkage [CPMT 1988]
A)
\[P{{b}_{2}}{{O}_{3}}\] done
clear
B)
\[Si{{O}_{2}}\] done
clear
C)
\[C{{O}_{2}}\] done
clear
D)
\[Pb{{O}_{2}}\] done
clear
View Solution play_arrow
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question_answer62)
Percentage of lead in lead pencil is [CBSE PMT 1999]
A)
Zero done
clear
B)
20 done
clear
C)
80 done
clear
D)
70 done
clear
View Solution play_arrow
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question_answer63)
Which of the following has most density [CPMT 1996]
A)
\[Fe\] done
clear
B)
\[Cu\] done
clear
C)
\[B\] done
clear
D)
\[Pb\] done
clear
View Solution play_arrow
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question_answer64)
Red lead in an example of a/an .... oxide [JIPMER 2001]
A)
Basic done
clear
B)
Super done
clear
C)
Mixed done
clear
D)
Amphoteric done
clear
View Solution play_arrow
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question_answer65)
Which of the following lead oxides is ?Sindhur? [MP PET 2002]
A)
\[PbO\] done
clear
B)
\[Pb{{O}_{2}}\] done
clear
C)
\[P{{b}_{2}}{{O}_{3}}\] done
clear
D)
\[P{{b}_{3}}{{O}_{4}}\] done
clear
View Solution play_arrow
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question_answer66)
Element showing the phenomenon of allotropy is [MP PMT 1999]
A)
Aluminium done
clear
B)
Tin done
clear
C)
Lead done
clear
D)
Copper done
clear
View Solution play_arrow
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question_answer67)
Which of the following element is a metalloid [CPMT 2004]
A)
Bi done
clear
B)
Sn done
clear
C)
Ge done
clear
D)
C done
clear
View Solution play_arrow
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question_answer68)
Which gas is liberated when \[A{{l}_{4}}{{C}_{3}}\]is hydrolysed [AFMC 2005]
A)
\[C{{H}_{4}}\] done
clear
B)
\[{{C}_{2}}{{H}_{2}}\] done
clear
C)
\[{{C}_{2}}{{H}_{6}}\] done
clear
D)
\[C{{O}_{2}}\] done
clear
View Solution play_arrow
-
question_answer69)
Which of the following attacks glass [NCERT 1976; AFMC 2005]
A)
HCl done
clear
B)
HF done
clear
C)
HI done
clear
D)
HBr done
clear
View Solution play_arrow