Q.1
Which of the following is a cyclic phosphate [ Haryana CEET 1196]
  • a) H3P3O10
  • b) H6P4O13
  • c) H5P5O15
  • d) H7P5O16
Q.2
What may be expected to happen when phosphine gas is mixed with Hydrogen chloride gas[ AIEEE 2003]
  • a) The mixture only cools down
  • b) PCl3 and HCl are formed and the mixture warms up
  • c) PCl5 and HCl are formed and mixture cools down
  • d) PH4.Cl is formed with warming up
Q.3
On adding excess of ammonium hydroxide to a copper chloride solution. [MH CET 1999]
  • a) A deep blue solution is obtained
  • b) No change is observed
  • c) Blue precipitate of copper hydroxide is obtained
  • d) Black precipitate of copper oxide is obtained
Q.4
Phosphine is produced by adding water to [ KCET 1991]
  • a) CaC2
  • b) HPO3
  • c) Ca3P2
  • d) P4P10
Q.5
The brown ring test for NO2- and NO3- is due to the formation of complex ion with a formula [ KCET 2000]
  • a) [ Fe(H2O)5NO ]2+
  • b) Mg3N2
  • c) NH3
  • d) MgO
Q.6
The P-P-P bond angle in white phosphorus is [ MPCET 1991]
  • a) 120°
  • b) 109° 28'
  • c) 90°
  • d) 60°
Q.7
The acid which forms two series of salt [ haryana CEET 1995]
  • a) H3PO4
  • b) H3PO3
  • c) H3BO3
  • d) H3PO2
Q.8
Which one of following substance has highest proton affinity [ AIEEE 2003 ]
  • a) H2O
  • b) H2S
  • c) NH3
  • d) PH3
Q.9
NH3 and BF3 form an adduct readily because thy form [ KCET 2000]
  • a) A coordinate bond
  • b) A hydrogen bond
  • c) An ionic bond
  • d) A covalent bond
Q.10
The correct sequence of decreases in the bond angle of the following hydrides is [ MPCET 2002]
  • a) NH3 > PH3 > AsH3 > SbH3
  • b) NH3 > AsH3 > PH3 > SbH3
  • c) SbH3 > AsH3 > PH3 > NH3
  • d) PH3 > NH3 > AsH3 > SbH3
Q.11
Which of the following compound is not known ..[MP PMT 1988]
  • c) NCl5
  • a) NCl3
  • b) NI3
  • d) SbCl3
Q.12
P - O - P bond is present in
  • a) H4P2O7
  • b) H4P2O5
  • c) Both (a) and (b)
  • d) None of the these
Q.13
Which of the following fluoride does not exist? [ MPCET 1993 ]
  • a) NF5
  • b) PF5
  • c) AsF5
  • d) SbF5
Q.14
Brown colour in HNO3 can be removed by
  • a) Adding Mg power
  • b) Boiling the acid
  • c) Passing HN3 through acid
  • d) Passing air through warm acid
Q.15
Read P can be obtained white P by [ Kernataka CET 1989]
  • a) Heating in an atmosphere
  • b) Distilling it in a inert atmosphere
  • c) Dissolving it in CS2 and crystallizing
  • d) Melting it and pouring the liquid into water
Q.16
metal X on heating in nitrogen gas gives Y, Y on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives blue colour, Y is
  • a) Mg(NO3)2
  • b) Mg3N2
  • c) NH3
  • d) MgO
Q.17
Which of the following has highest dipole moment? [ Haryana CEET 2000]
  • a) NH3
  • b) PH3
  • c) AsH3
  • d) SbH3
Q.18
When ammonia is passed over heated copper oxide, the metallic copper is obtained. the reaction shows that ammonia is [ MPCET 2002]
  • a) A dehydrating agent
  • b) An oxidizing agent
  • c) A reducing agent
  • d) A nitrating agent
Q.19
Group 15 of the periodic table consists of the element N, P, As, Sb, and Bi. On passing from N to Bi, the oxides of the elements of general formula M2O3 become
  • a) Stronger reducing agents
  • b) More ionic
  • c) More basic
  • d) More volatile
Q.20
Which oxide does not acts as reducing agent ? [ MPCET 1990]
  • a) NO
  • b) NO2
  • c) N2O
  • d) N2O5
Q.21
Which of the following is used as fertilizer? [ CPMT 1998]
  • a) CaC2
  • b) NaAlO2
  • c) Ca(H2PO4)2 . H2O +CaSO4
  • d) All the three
Q.22
In modern process, white phosphorus is manufactured by .. [ CPMT 1994]
  • a) Heating a mixture of phosphorite mineral with sand and coke in an electric furnace
  • b) Heating calcium phosphate with lime
  • c) Heating bone ash with coke
  • d) Heating phosphate mineral with sand
Q.23
When excess of water is added to BiCl3 solution .. [ AFMC 1994]
  • a) Ionization of BiCl3 is increased
  • b) A white ppt of Bi(OH)3 is obtained
  • c) BiCl3 is hydrolysed to give white ppt of BiOCl
  • d) BiCl3 is precipitated
Q.24
Which of the following is a cyclic phosphate? [ Haryana CEET 1996]
  • a) H3P3O10
  • b) H6P4O13
  • c) H5P5O15
  • d) H2P5O16
Q.25
Phosphine is not obtained by the reaction when ... [ MP PMT 1989]
  • a) White P is heated with NaOH
  • b) Red P is heated with NaOH
  • c) Ca3P2
  • d) P4O6 is boiled with water
Q.26
Aqueous solution of ammonia consist of .. [ CBSE PMT 1991]
  • a) H+
  • b) OH-
  • c) NH4+
  • d) NH4+ and OH-
Q.27
Phosphrous pentaoxide find use as .. { BHU 1993]
  • a) An oxidising agent
  • b) A reducing agent
  • c) A bleaching agent
  • d) A dehydrating agent
Q.28
Which of the following has least covalent [ CPMT 1996]
  • a) PH3
  • b) P2H62+
  • c) P3H5+
  • d) PH4+
Q.29
EAch of the following is true of white and red phosphorus except that they ... [ CBSE PMT 1989]
  • a) Are both soluble in CS2
  • b) Can be oxidised by heating in air
  • c) Consist of the same kind of atom
  • d) Can be converted into one another
Q.30
In P4O6 number of oxygen atoms bonded to each phosphorous atom is ... [MP PMT 1995]
  • a) 1.5
  • b) 2
  • c) 3
  • d) 4
0 h : 0 m : 1 s