Boron shows diagonal relation with
  • Al
  • C
  • Si
  • Sn
Catenation property is maximum in
  • phosphorus
  • carbon
  • sulphur
  • zinc
Which one of the following is an electrophilic reagent?
  • BF
  • KH
  • H
  • None of these
Element found from sea water is
  • magnesium
  • Sodium
  • Iodine
  • None of these
The shape of XeF is
  • tetrahedral
  • square planar
  • pyramidal
  • linear
Which one of the following is the strongest lewis acid?
  • BF
  • BCl
  • BBr
  • Bl
Which one of the following does not form hydrogen bonding?
  • NH
  • HO
  • HCl
  • HF
Main source of helium is
  • Air
  • Radium
  • Monazite
  • Water
Which one of the following dement is liquid at normal temperature?
  • zinc
  • mercury
  • bromine
  • water
Which one of the following is least basic?
  • NCl
  • NBr
  • NI
  • NF
Modern periodic table is given by
  • Debonair
  • Mendeleef
  • Mendel
  • None of these
Which one of the following elements is found in free state in nature?
  • Sodium
  • Iron
  • Zinc
  • Gold
Which of the following is the strongest oxidising agent?
  • F
  • Cl
  • l
  • Br
Which of the following has maximum ionisation potential?
  • Al
  • P
  • Si
  • Mg
The number of P-O-P bonds in cyclic metaphosphoric acid is
  • 2
  • 0
  • 3
  • 4
Which oxide of nitrogen is obtained on heating ammonium nitrate at 250°C ?
  • Nitric oxide
  • Nitrous oxide
  • Nitrogen dioxide
  • Dinitrogen tetraoxide
Atomicity of phosphorus is
  • 1
  • 2
  • 3
  • 4
The structure of white phosphorus is
  • square-planar
  • pyramidal
  • tetrahedral
  • trigonal planar
PCl on hydrolysis gives
  • HPO
  • HP
  • POCl
  • None of the above
How many P-O-P bonds appear in cyclic meta-phosphoric acid?
  • 4
  • 3
  • 2
  • 1
0 h : 0 m : 1 s

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