question_answer 1)
The correct sequence in decreasing order of the percentage of nitrogen in the given compounds is [NDA 1999]
A)
Urea > Ammonium chloride > Ammonium nitrate > Ammonium nitrite done
clear
B)
Urea > Ammonium nitrate > Ammonium nitrite > Ammonium chloride done
clear
C)
Urea > Ammonium nitrite > Ammonium nitrate > Ammonium chloride done
clear
D)
Urea > Ammonium nitrite > Ammonium chloride > Ammonium nitrate done
clear
View Solution play_arrow
question_answer 2)
As the alkaline earth metals (except Be) tend to lose their valence electrons readily they act as [Kerala (Med.) 2002]
A)
Weak oxidising agent done
clear
B)
Weak reducing agent done
clear
C)
Strong oxidising agent done
clear
D)
Strong reducing agent done
clear
View Solution play_arrow
question_answer 3)
The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This is because [UPSEAT 2001]
A)
There is increases in the nuclear charge of the alkaline earth metals done
clear
B)
There is decreases in the nuclear charge of the alkaline earth metals done
clear
C)
There is no change in the nuclear charge done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 4)
Lead is maximum in [BVP 2004]
A)
Soda glass done
clear
B)
Jena glass done
clear
C)
Pyrex glass done
clear
D)
Flint glass done
clear
View Solution play_arrow
question_answer 5)
\[BaS{{O}_{4}}\] and carbon on heating reacts to produce [Pb. PMT 2004]
A)
\[Ba+S{{O}_{2}}+C{{O}_{2}}\] done
clear
B)
\[BaS+CO\] done
clear
C)
\[BaS+{{O}_{2}}+S{{O}_{2}}\] done
clear
D)
\[BaC{{O}_{3}}+S+{{O}_{2}}\] done
clear
View Solution play_arrow
question_answer 6)
The atomic radii of alkali metals (M) lie in the order \[Li<Na<K<Rb\] but the radii of \[{{M}^{+}}\] ions in aqueous solution lie in the reverse order \[L{{i}^{+}}>N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}}\]. What is the reason for this reverse order (on going from \[Li\] to\[Rb)\]? [MP PMT 1997]
A)
Gradual increase in ionisation energy done
clear
B)
Increasing weakness of the metallic bond done
clear
C)
Increasing electropositive character done
clear
D)
Decreasing degree of hydration done
clear
View Solution play_arrow
question_answer 7)
Fusion mixture is [CPMT 2002]
A)
\[N{{a}_{2}}C{{O}_{3}}+{{K}_{2}}C{{O}_{3}}\] done
clear
B)
\[N{{a}_{2}}C{{O}_{3}}\]\[+NaHC{{O}_{3}}\] done
clear
C)
\[N{{a}_{2}}C{{O}_{3}}+NaOH\] done
clear
D)
\[N{{a}_{2}}C{{O}_{3}}+{{K}_{2}}S{{O}_{4}}\] done
clear
View Solution play_arrow
question_answer 8)
Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that [AIEEE 2003]
A)
Concentrated hydrochloric acid emits strongly smelling \[HCl\] gas all the time done
clear
B)
Oxygen in air reacts with the emitted \[HCl\] gas to form a cloud of chlorine gas done
clear
C)
Strong affinity of \[HCl\] gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke done
clear
D)
Due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air towards itself. This moisture forms droplets of water and hence the cloud done
clear
View Solution play_arrow
question_answer 9)
Match List I with List II and select the correct answer using the codes given below the lists List I List II
List - I
List - II
(A)
Peroxide
(1)
\[{{C}_{3}}{{O}_{2}}\]
(B)
Superoxide
(2)
\[Pb{{O}_{2}}\]
(C)
Dioxide
(3)
\[K{{O}_{2}}\]
(D)
Suboxide
(4)
\[{{H}_{2}}{{O}_{2}}\]
Codes: [NDA 1999]
A)
A-4 B-3 C-2 D-1 done
clear
B)
A-3 B-2 C-1 D-4 done
clear
C)
A-4 B-2 C-3 D-1 done
clear
D)
A-4 B-1 C-2 D-3 done
clear
View Solution play_arrow
question_answer 10)
The most efficient agent for the absorption of \[S{{O}_{3}}\] is [KCET 1998]
A)
\[98%{{H}_{2}}S{{O}_{4}}\] done
clear
B)
\[80%{{H}_{2}}S{{O}_{4}}\] done
clear
C)
\[20%\]oleum done
clear
D)
\[90%{{H}_{2}}S{{O}_{4}}\] done
clear
View Solution play_arrow
question_answer 11)
Mark the oxide which is amphoteric in character [MP PMT 2000]
A)
\[C{{O}_{2}}\] done
clear
B)
\[Si{{O}_{2}}\] done
clear
C)
\[Sn{{O}_{2}}\] done
clear
D)
\[Ca{{O}_{{}}}\] done
clear
View Solution play_arrow
question_answer 12)
Concentrated aqueous sodium hydroxide can separate mixture of [MNR 1995]
A)
\[A{{l}^{3+}}\] and \[S{{n}^{2+}}\] done
clear
B)
\[A{{l}^{3+}}\] and \[F{{e}^{3+}}\] done
clear
C)
\[A{{l}^{3+}}\] and \[Z{{n}^{2+}}\] done
clear
D)
\[Z{{n}^{2+}}\] and \[P{{b}^{2+}}\] done
clear
View Solution play_arrow
question_answer 13)
The composition of the common glass is [DCE 2004]
A)
\[N{{a}_{2}}O.CaO.6Si{{O}_{3}}\] done
clear
B)
\[N{{a}_{2}}O.A{{l}_{2}}{{O}_{3}}.Si{{O}_{2}}\] done
clear
C)
\[CaO.A{{l}_{2}}{{O}_{3}}.Si{{O}_{2}}\] done
clear
D)
\[N{{a}_{2}}O.CaO.6Si{{O}_{2}}\] done
clear
View Solution play_arrow
question_answer 14)
The metal which does not form ammonium nitrate by reaction with dilute nitric acid is [KCET 2004]
A)
Al done
clear
B)
Fe done
clear
C)
Pb done
clear
D)
Mg done
clear
View Solution play_arrow
question_answer 15)
Total number of lone pair of electrons in \[XeO{{F}_{4}}\] is [IIT-JEE (Screening) 2004]
A)
0 done
clear
B)
1 done
clear
C)
2 done
clear
D)
3 done
clear
View Solution play_arrow
question_answer 16)
What is the correct relationship between the pHs of isomolar solutions of sodium oxide \[(p{{H}_{1}}),\] sodium sulphide \[(p{{H}_{2}}),\] sodium selenide \[(p{{H}_{3}})\] and sodium telluride \[(p{{H}_{4}})\] [CBSE PMT 2005]
A)
\[p{{H}_{1}}>p{{H}_{2}}=p{{H}_{3}}>p{{H}_{4}}\] done
clear
B)
\[p{{H}_{1}}<p{{H}_{2}}<p{{H}_{3}}<p{{H}_{4}}\] done
clear
C)
\[p{{H}_{1}}<p{{H}_{2}}<p{{H}_{3}}=p{{H}_{4}}\] done
clear
D)
\[p{{H}_{1}}>p{{H}_{2}}>p{{H}_{3}}>p{{H}_{4}}\] done
clear
View Solution play_arrow
question_answer 17)
Which one of the following is not an amphoteric substance [KCET 2004]
A)
\[HN{{O}_{3}}\] done
clear
B)
\[HCO_{3}^{-}\] done
clear
C)
\[{{H}_{2}}O\] done
clear
D)
\[N{{H}_{3}}\] done
clear
View Solution play_arrow
question_answer 18)
Which group is called buffer group of the periodic table [Pb. CET 2004]
A)
I done
clear
B)
VII done
clear
C)
VIII done
clear
D)
Zero done
clear
View Solution play_arrow
question_answer 19)
Which of the following salt is insoluble in water [MP PET 2004]
A)
\[CuS{{O}_{4}}\] done
clear
B)
\[CdS{{O}_{4}}\] done
clear
C)
\[PbS{{O}_{4}}\] done
clear
D)
\[B{{i}_{2}}{{(S{{O}_{4}})}_{3}}\] done
clear
View Solution play_arrow
question_answer 20)
Which of the following oxides is the most acidic [CBSE PMT 1999; MP PMT 2002]
A)
\[{{N}_{2}}{{O}_{5}}\] done
clear
B)
\[{{P}_{2}}{{O}_{5}}\] done
clear
C)
\[A{{s}_{2}}{{O}_{5}}\] done
clear
D)
\[S{{b}_{2}}{{O}_{5}}\] done
clear
View Solution play_arrow
question_answer 21)
Whose bond energy is maximum [CPMT 1988; MP PMT 1990]
A)
\[{{F}_{2}}\] done
clear
B)
\[C{{l}_{2}}\] done
clear
C)
\[B{{r}_{2}}\] done
clear
D)
\[{{I}_{2}}\] done
clear
View Solution play_arrow
question_answer 22)
Calcium cyanide on treatment with steam under pressure gives \[N{{H}_{3}}\] and [DPMT 2002]
A)
\[CaHC{{O}_{3}}\] done
clear
B)
\[CaO\] done
clear
C)
\[Ca{{(OH)}_{2}}\] done
clear
D)
\[CaC{{O}_{3}}\] done
clear
View Solution play_arrow
question_answer 23)
Six volumes of oxygen, on complete ozonisation, form ...... volumes of ozone [DPMT 2000]
A)
4 done
clear
B)
3 done
clear
C)
2 done
clear
D)
6 done
clear
View Solution play_arrow
question_answer 24)
The substance not likely to contain \[CaC{{O}_{3}}\] is [AIEEE 2003]
A)
A marble statue done
clear
B)
Calcined gypsum done
clear
C)
Sea shells done
clear
D)
Dolomite done
clear
View Solution play_arrow
question_answer 25)
Which of the following statements is false for alkali metals [MNR 1994; MP PET 2001]
A)
Lithium is the strongest reducing agent done
clear
B)
\[Na\] is amphoteric in nature done
clear
C)
\[L{{i}^{+}}\] is exceptionally small done
clear
D)
All alkali metals give blue solution in liquid ammonia done
clear
View Solution play_arrow
question_answer 26)
Solubility of iodine in water is greatly increased by the addition of iodide ions because of the formation of ...... [IIT 1994]
A)
\[{{I}_{2}}\] done
clear
B)
\[{{I}_{3}}\] done
clear
C)
\[{{I}_{3}}^{-}\] done
clear
D)
\[{{I}^{-}}\] done
clear
View Solution play_arrow
question_answer 27)
The solubility in water of sulphates down the \[Be\] group is \[Be>Mg>>Ca>Sr>Ba\]. This is due to [CBSE PMT 1995]
A)
High heat of solvation for smaller ions like \[B{{e}^{2+}}\] done
clear
B)
Increasing molecular weight done
clear
C)
Decreasing lattice energy done
clear
D)
Increase in melting points done
clear
View Solution play_arrow
question_answer 28)
Magnesium burns in air to give [CPMT 1988, 89; AFMC 1987]
A)
\[MgO\] done
clear
B)
\[M{{g}_{3}}{{N}_{2}}\] done
clear
C)
\[MgC{{O}_{3}}\] done
clear
D)
\[MgO\] and \[M{{g}_{3}}{{N}_{2}}\] both done
clear
View Solution play_arrow
question_answer 29)
Philospher's wool when heated with \[BaO\] at \[{{1100}^{o}}C\] gives a compound. Identify the compound [CPMT 1997]
A)
\[BaZn{{O}_{2}}\] done
clear
B)
\[Ba+Zn{{O}_{2}}\] done
clear
C)
\[BaCd{{O}_{2}}\] done
clear
D)
\[Ba{{O}_{2}}+Zn\] done
clear
View Solution play_arrow
question_answer 30)
Which of the following oxide is diamagnetic [MP PET 1990]
A)
\[NO\] done
clear
B)
\[N{{H}_{3}}\] done
clear
C)
\[{{N}_{2}}{{H}_{4}}\] done
clear
D)
\[{{N}_{2}}{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 31)
Which of the following salt becomes plaster of paris on being appropriately hydrated [CPMT 1985]
A)
\[ZnC{{O}_{3}}\] done
clear
B)
\[CaS{{O}_{4}}\] done
clear
C)
\[MgS{{O}_{4}}\] done
clear
D)
\[CaC{{O}_{3}}\] done
clear
View Solution play_arrow
question_answer 32)
The number of electron and proton in the third alkaline earth metal ion will be [MP PET 2003]
A)
\[\frac{e}{20},\,\,\frac{p}{20}\] done
clear
B)
\[\frac{e}{18},\,\,\frac{p}{20}\] done
clear
C)
\[\frac{e}{18},\,\,\frac{p}{18}\] done
clear
D)
\[\frac{e}{19},\,\,\frac{p}{20}\] done
clear
View Solution play_arrow
question_answer 33)
The compounds of alkaline earth metals have the following magnetic nature [MP PET/PMT 1998; RPMT 2000; JIPMER 2002]
A)
Diamagnetic done
clear
B)
Paramagnetic done
clear
C)
Ferromagnetic done
clear
D)
Diaferromagnetic done
clear
View Solution play_arrow
question_answer 34)
Which of the following is the life saving mixture for an asthma patient [MP PMT 2001]
A)
Mixture of helium and oxygen done
clear
B)
Mixture of neon and oxygen done
clear
C)
Mixture of xenon and nitrogen done
clear
D)
Mixture of argon and oxygen done
clear
View Solution play_arrow
question_answer 35)
Which would quickly absorbs oxygen [CBSE PMT 1992; MP PET 1995]
A)
Alkaline solution of pyrogallol done
clear
B)
Conc. \[{{H}_{2}}S{{O}_{4}}\] done
clear
C)
Lime water done
clear
D)
Alkaline solution of \[CuS{{O}_{4}}\] done
clear
View Solution play_arrow
question_answer 36)
Nitrogen is liberated by the thermal decomposition of only [IIT 1991]
A)
\[N{{H}_{4}}N{{O}_{2}}\] done
clear
B)
\[Na{{N}_{3}}\] done
clear
C)
\[{{(N{{H}_{4}})}_{2}}C{{r}_{2}}{{O}_{7}}\] done
clear
D)
All the three done
clear
View Solution play_arrow
question_answer 37)
Red phosphorus is less reactive than yellow phosphorus because [DPMT 1982; JIPMER 1999;CBSE PMT 1999; RPET 2003]
A)
Its colour is red done
clear
B)
It is highly polymerized done
clear
C)
It is hard done
clear
D)
It is insoluble in \[{{C}_{2}}{{H}_{5}}OH\] done
clear
View Solution play_arrow
question_answer 38)
Carbon differs from other elements of the group. Which is the false statement [DPMT 2000]
A)
Due to its marked tendency to form long chains (catenation) done
clear
B)
Due to its unique ability to form multiple bonds done
clear
C)
Due to d-orbital in penultimate shell done
clear
D)
Due to its limitation of co-ordination number 4 done
clear
View Solution play_arrow
question_answer 39)
Which of the following oxide does not form acidic aqueous solution [CPMT 2004]
A)
\[{{N}_{2}}{{O}_{3}}\] done
clear
B)
\[N{{O}_{2}}\] done
clear
C)
\[{{N}_{2}}{{O}_{5}}\] done
clear
D)
NO done
clear
View Solution play_arrow
question_answer 40)
Which of the following is in the increasing order of the ionic character [JIPMER 2002]
A)
\[PbC{{l}_{4}}<PbC{{l}_{2}}<CaC{{l}_{2}}<NaCl\] done
clear
B)
\[PbC{{l}_{2}}<PbC{{l}_{4}}<CaC{{l}_{2}}<NaCl\] done
clear
C)
\[PbC{{l}_{2}}<PbC{{l}_{4}}<NaCl<CaC{{l}_{2}}\] done
clear
D)
\[PbC{{l}_{4}}<PbC{{l}_{2}}<NaCl<CaC{{l}_{2}}\] done
clear
View Solution play_arrow
question_answer 41)
Silicon chloroform is prepared by [MH CET 1999]
A)
\[Si+HCl\] done
clear
B)
\[SiC{{l}_{4}}\]+\[{{H}_{2}}O\] done
clear
C)
\[Si{{F}_{4}}\]+\[NaF\] done
clear
D)
\[{{H}_{2}}Si{{F}_{6}}+C{{l}_{2}}\] done
clear
View Solution play_arrow
question_answer 42)
\[K{{O}_{2}}\] (potassium superoxide) is used in oxygen cylinders in space and submarines because it [AIEEE 2002]
A)
Absorbs \[C{{O}_{2}}\]and increases \[{{O}_{2}}\] content done
clear
B)
Eliminates moisture done
clear
C)
Absorbs \[C{{O}_{2}}\] done
clear
D)
Produces ozone done
clear
View Solution play_arrow
question_answer 43)
Fire extinguishers contain \[{{H}_{2}}S{{O}_{4}}\] and [AFMC 1980]
A)
\[CaC{{O}_{3}}\] done
clear
B)
\[N{{a}_{2}}C{{O}_{3}}\] done
clear
C)
\[NaHC{{O}_{3}}\] done
clear
D)
\[NaHC{{O}_{3}}\] and \[N{{a}_{2}}C{{O}_{3}}\] done
clear
View Solution play_arrow
question_answer 44)
Which is insoluble in water [CPMT 2003]
A)
\[{{H}_{2}}S\] done
clear
B)
\[HgC{{l}_{2}}\] done
clear
C)
\[Ca{{(N{{O}_{3}})}_{2}}\] done
clear
D)
\[Ca{{F}_{2}}\] done
clear
View Solution play_arrow
question_answer 45)
Which of the following halides is most acidic [KCET 1996]
A)
\[PC{{l}_{3}}\] done
clear
B)
\[SbC{{l}_{3}}\] done
clear
C)
\[BiC{{l}_{3}}\] done
clear
D)
\[CC{{l}_{4}}\] done
clear
View Solution play_arrow
question_answer 46)
The stability of the following alkali metal chlorides follows the order [MP PET/PMT 1998]
A)
\[LiCl>KCl>NaCl>CsCl\] done
clear
B)
\[CsCl>KCl>NaCl>LiCl\] done
clear
C)
\[NaCl>KCl>LiCl>CsCl\] done
clear
D)
\[KCl>CsCl>NaCl>LiCl\] done
clear
View Solution play_arrow
question_answer 47)
The reaction of \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\] with iodine gives [CPMT 1971, 80, 81; DPMT 1983, 90; MP PMT 1985; EAMCET 1990; BHU 1980]
A)
Sodium sulphide done
clear
B)
Sodium sulphite done
clear
C)
Sodium sulphate done
clear
D)
Sodium tetrathionate done
clear
View Solution play_arrow
question_answer 48)
Which one of the following is the true covalent oxide of iodine [MP PET/PMT 1988]
A)
\[{{I}_{2}}{{O}_{4}}\] done
clear
B)
\[{{I}_{2}}{{O}_{5}}\] done
clear
C)
\[{{I}_{2}}{{O}_{7}}\] done
clear
D)
\[{{I}_{2}}{{O}_{9}}\] done
clear
View Solution play_arrow
question_answer 49)
Lithium aluminium hydride acts as [CPMT 1994]
A)
Oxidising agent done
clear
B)
Reducing agent done
clear
C)
Both the above done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 50)
The mixture of conc. HCl and potassium chlorate on heating gives [Roorkee 2000]
A)
\[C{{l}_{2}}\] only done
clear
B)
\[Cl{{O}_{2}}\]only done
clear
C)
\[C{{l}_{2}}+Cl{{O}_{2}}\] done
clear
D)
\[C{{l}_{2}}+Cl{{O}_{2}}+Cl{{O}_{3}}\] done
clear
View Solution play_arrow
question_answer 51)
When \[S{{O}_{2}}\] is passed through acidified solution of \[{{H}_{2}}S\] [CPMT 1973, 81, 93]
A)
\[{{H}_{2}}S{{O}_{4}}\] is formed done
clear
B)
\[{{H}_{2}}S{{O}_{3}}\] is formed done
clear
C)
Sulphur is precipitated done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 52)
Four reactions are given below (i)\[2Li+2{{H}_{2}}O\to 2LiOH+{{H}_{2}}\] (ii)\[2Na+2{{H}_{2}}O\to 2NaOH+{{H}_{2}}\] (iii)\[2LiN{{O}_{3}}\xrightarrow{Heat}2LiN{{O}_{2}}+{{O}_{2}}\] (iv)\[2NaN{{O}_{3}}\xrightarrow{Heat}2NaN{{O}_{2}}+{{O}_{2}}\] Which of the above, if any, is wrong
A)
(iv) done
clear
B)
(iii) done
clear
C)
(i) done
clear
D)
None of these done
clear
View Solution play_arrow
question_answer 53)
Increasing order of solubility is [AFMC 1987]
A)
\[CaC{{O}_{3}},KHC{{O}_{3}},NaHC{{O}_{3}}\] done
clear
B)
\[NaHC{{O}_{3}},KHC{{O}_{3}},CaC{{O}_{3}}\] done
clear
C)
\[KHC{{O}_{3}},NaHC{{O}_{3}},CaC{{O}_{3}}\] done
clear
D)
\[CaC{{O}_{3}},NaHC{{O}_{3}},KHC{{O}_{3}}\] done
clear
View Solution play_arrow
question_answer 54)
Nitrolim is [CPMT 1976, 78, 2000; BHU 1987; DCE 1999; RPMT 2000]
A)
\[Ca{{(N{{O}_{3}})}_{2}}\] done
clear
B)
\[Ca{{(CN)}_{2}}\] done
clear
C)
\[CaC{{N}_{2}}+C\] done
clear
D)
\[CaC{{N}_{2}}\] done
clear
View Solution play_arrow
question_answer 55)
The following acids have been arranged in the order of decreasing acid strength. Identify the correct order. (I) \[ClOH\] (II) \[BrOH\] (III) \[IOH\] [IIT 1996]
A)
\[I>II>III\] done
clear
B)
\[II>I>III\] done
clear
C)
\[III>II>I\] done
clear
D)
\[I>III>II\] done
clear
View Solution play_arrow
question_answer 56)
Which of the following element does not belong to the family of elements indicated [Orissa JEE 1997]
A)
Rubidium (Rb, Z = 37) : Alkali metals done
clear
B)
Barium (Ba, Z = 56) : Alkaline earth metals done
clear
C)
Iridium (I, Z = 77) : Nobel gases done
clear
D)
Argon (Ar, Z = 18) : Nobel gases done
clear
View Solution play_arrow
question_answer 57)
\[{{H}_{3}}P{{O}_{2}}\] is the formula for one of the phosphorus acid. Its name and basicity are respectively [CBSE PMT 1992; BHU 1999; KCET 1999]
A)
Phosphorus acid and two done
clear
B)
Hypophosphorus acid and two done
clear
C)
Hypophosphorus acid and one done
clear
D)
Hypophosphoric acid and two done
clear
View Solution play_arrow
question_answer 58)
Which of the following oxides of nitrogen is paramagnetic [CPMT 1984; CBSE PMT 1994; AIIMS 2000]
A)
\[{{N}_{2}}{{O}_{3}}\] done
clear
B)
\[{{N}_{2}}O\] done
clear
C)
\[N{{O}_{2}}\] done
clear
D)
\[{{N}_{2}}{{O}_{5}}\] done
clear
View Solution play_arrow
question_answer 59)
Nessler's reagent is [CPMT 2002]
A)
Potassium in mercuric iodide done
clear
B)
\[TiC{{l}_{4}}\] done
clear
C)
Anhydrous \[AlC{{l}_{3}}\] done
clear
D)
\[A{{l}_{2}}{{O}_{3}}/C{{r}_{2}}{{O}_{3}}\] done
clear
View Solution play_arrow
question_answer 60)
The noble gas was first time discovered by
A)
Cavandish done
clear
B)
William Ramsay done
clear
C)
Rayleigh done
clear
D)
Frankland done
clear
View Solution play_arrow
question_answer 61)
The ratio of \[\frac{{{C}_{p}}}{{{C}_{v}}}\] for inert gases is [DCE 1999]
A)
1.99 done
clear
B)
2.13 done
clear
C)
1.66 done
clear
D)
1.33 done
clear
View Solution play_arrow
question_answer 62)
White P reacts with caustic soda, the products are \[P{{H}_{3}}\] and \[Na{{H}_{2}}P{{O}_{2}}\]. This reaction is an example of [DCE 2003]
A)
Oxidation done
clear
B)
Reduction done
clear
C)
Disproportionation done
clear
D)
Neutralisation done
clear
View Solution play_arrow
question_answer 63)
The oxide, which cannot act as a reducing agent, is [Pb. CET 2002]
A)
\[N{{O}_{2}}\] done
clear
B)
\[S{{O}_{2}}\] done
clear
C)
\[C{{O}_{2}}\] done
clear
D)
\[Cl{{O}_{2}}\] done
clear
View Solution play_arrow
question_answer 64)
Which of the following product is formed when \[Si{{F}_{4}}\] reacts with water [Pb. CET 2003]
A)
\[Si{{F}_{3}}\] done
clear
B)
\[{{H}_{4}}Si{{O}_{4}}\] done
clear
C)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[{{H}_{2}}Si{{F}_{4}}\] done
clear
View Solution play_arrow
question_answer 65)
Ozone with dry iodine give [Pb. CET 2003]
A)
\[{{I}_{4}}{{O}_{4}}\] done
clear
B)
\[{{I}_{2}}{{O}_{3}}\] done
clear
C)
\[I{{O}_{2}}\] done
clear
D)
\[{{I}_{2}}{{O}_{4}}\] done
clear
View Solution play_arrow
question_answer 66)
The microcosmic salt is [Pb.CET 2004; Pb. PMT 2004]
A)
\[Na(N{{H}_{4}}){{H}_{2}}O\] done
clear
B)
\[K(N{{H}_{4}})HP{{O}_{3}}2{{H}_{2}}O\] done
clear
C)
\[Na(N{{H}_{4}})HP{{O}_{4}}4{{H}_{2}}O)\] done
clear
D)
\[Na(N{{H}_{3}})HP{{O}_{4}}4{{H}_{2}}O\] done
clear
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question_answer 67)
Thermite is a mixture of [Pb. CET 2004]
A)
\[C{{r}_{2}}{{O}_{3}}+A{{l}_{2}}{{O}_{3}}\] done
clear
B)
\[F{{e}_{2}}{{O}_{3}}+Al\] done
clear
C)
\[F{{e}_{2}}{{O}_{3}}+A{{l}_{2}}{{O}_{3}}\] done
clear
D)
\[A{{l}_{2}}{{O}_{3}}+2Cr\] done
clear
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question_answer 68)
The colour of liquid \[{{O}_{2}}\] is [BVP 2004]
A)
Red done
clear
B)
Dark blue done
clear
C)
Pale yellow done
clear
D)
Pale blue done
clear
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question_answer 69)
Which of the following gas mixture is used by the divers inside the sea [AFMC 2004]
A)
\[{{O}_{2}}+He\] done
clear
B)
\[{{O}_{2}}+Xe\] done
clear
C)
\[{{O}_{2}}+Ar\] done
clear
D)
\[{{O}_{2}}+{{N}_{2}}\] done
clear
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question_answer 70)
One mole of magnesium nitride on the reaction with an excess of water gives [AIEEE 2004]
A)
Two moles of ammonia done
clear
B)
One mole of nitric acid done
clear
C)
One mole of ammonia done
clear
D)
Two moles of nitric acid done
clear
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question_answer 71)
Calcium cyanamide on treatment with steam produce [Pb. PMT 2004]
A)
\[CaC{{O}_{3}}+N{{H}_{ 3}}\] done
clear
B)
\[CaHC{{O}_{3}}+N{{H}_{3}}\] done
clear
C)
\[CaO+N{{H}_{3}}\] done
clear
D)
\[Ca{{(OH)}_{2}}+N{{H}_{3}}\] done
clear
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