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Which of the following is formula of group 16 oxides?
Which among the following hydrides has doubtful existance?
There are many elements which exhibit variable valence. This is particularly characteristic of ____ and ____ .
Group 18 has __ valence electrons.
Tritium radiates
The percentage of Deutrium in terrestrial hydrogen is
Deutriam occurs mostly in form of
The three isotopes of hydrogen differs in number of
Which one is not the isotope of hydrogen
Colour of important compounds ββ
(1)ZnSO4 (Zinc sulphate ) β Colourless
(2) AgNO3 (Silver nitrate) β Colourless
(3) AgCl (Silver chloride) β White
(4) MgO (Magnesium oxide) β White
(5) Al2 (SO4)3 (Aluminium Sulfate) βWhite an hydrous / colourless liquid
(6) CuSO4 (copper(II) sulfate) β Blue
(7) CuCl2 (Copper(II) chloride) β Bluish Green
(8) FeSO4 (Ferrous sulfate) β Green
(9) BaSO4 (Barium sulfate) β White
(10) CuO (Copper(II) oxide) β Black
(11) PbO (Lead(II) oxide) β Yellow
(12) Pb (NO3)2(Lead nitrate) βWhite
(13) PbSO4 (Lead(II) sulfate) β White
(14) PbI2 (Lead iodide) β Yellow
(15) PbCl2 (Lead(II) chloride) β White
(16) Fe2O3 (iron(III) oxide) β Brown
(17) Ag Br (Silver bromide β Yellow
(18) Ag (silver) β Grey
(19) Zn Cl2 (Zinc chloride) β White
(20) Cu2+ Cupric ion β Blue
(21) Fe2+ Ferrous Ion β Light Green
(22) Fe3+ (Ferric Ion) β Yellowish Brown
(23) Ni2+ (Nickel Ion) β Green
(24) Cr3+ (Chromium Ion) β Green
(24) Mn2+ (Manganese Ion) β Pink
(25) Na2SO4 (Sodium sulfate) β White
(26) K2SO4 (Potassium Sulfate) βWhite
(27) MgCl2 (Magnesium Chloride) β White
(28) KCl (Potassium chloride) β White
(29) BaCl2 (Barium chloride) β White
(30) NaCl (Sodium chloride) β White
(31) AgNO3 (Silver nitrate) β White
(32) CaCO3 (Calcium carbonate) β White
The ionization enthalpy _________ down the group in the family.
For a satellite executing an elliptical orbit around a planet, its minimum potential energy is at the perigee.
____________ and Boron are same in case when reacted with concentrated nitric acid.
The height of the geostationary satellites above the earthβs surface is approximately 36,000 km.
Classical smog which of the following chemicals?
The main components of the photochemical smog result from the action of sunlight on which compounds?
Which of the following is true for photochemical smog?
Which of the following is not the seen in Classical smog?
Which is the most common example of air pollution that occurs in many cities throughout the world?
London forces were first proposed bty Fritz London who was a
