Potassium Dichromate
Trending Questions
Identify the compound X on the basis of the reactions given below. Also, write the name and chemical formulae of A, B and C.
In acidic medium (Conc. H2SO4), Hydrogen peroxide reacts with K2Cr2O7 in the presence of ether forms a deep violet coloured chromium peroxide. The Oxidation state of chromium in chromium pentoxide is
+2
+3
+5
+6
What is the reason for the formation of a meta product in the following reaction ?
Aniline is ortho/para directing
Aniline is meta directing
In acidic medium, aniline is converted into anilinium ion, which is ortho/para directing
In acidic medium, aniline is converted into anilinium ion, which is meta directing
calculate the mass of MnO2 needed to produce 1.78 litres of chlorine gas at STP according to the equation
MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
[H = 1, Cl = 35.5, Mn = 54.9]
6.905g
25.2 ml
6.1g
25.9 ml
- oxygen
- Hydrogen
- Sulphur Dioxide
- Hydrogen sulphide
A = 1.8, B = 7, C = 8.5, D = 13, and E = 5
Classify these solutions as neutral, slightly or strongly acidic & slightly or strongly alkaline.
Which solution would be most likely to liberate Hydrogen with :
(a) Magnesium powder,
(b) Powdered zinc metal.
Give a word equation for each reaction.
In the purification of NaCl, an impure solution is saturated with HCl gas. The principle involved is:
Common ion effect and low solubility of MgCl2 and CaCl2 when compared to NaCl
Common ion effect and high solubility of MgCl2 and CaCl2 when compared to NaCl
KSP of NaCl is greater than that of MgCl2
KSP of NaCl is greter than that of CaCl2 but less than that of MgCl2
- Choose the correct answer from the option given below:
- Nitrogen gas can be obtained by heating.
(a) Ammonium nitrate
(b) Ammonium nitrite
(c) Ammonium nitrite
(d) Ammonium Chloride
- Nitrogen gas can be obtained by heating.
Ammonium nitrate
Ammonium nitrite
Magnesium nitride
Ammonium Chloride
NaOH
Na2O
Na2O2
- CrSO4
- K2SO4
- Cr2(SO4)3
- S
- 4Cr-O bonds are equivalent
- 6 Cr-O bonds are equivalent
- All Cr-O bonds are equivalent
- All Cr-O bonds are non-equivalent
- True
- False
450 cm3 of nitogen monoxide and 200 cm3 of oxygen are mixed together and ignited. Calculate the composition of the resulting mixture.
- Green Cr2(SO4)3 is formed.
- The solution is decolourised.
- The solution turns blue.
- SO2 is reduced.
CrO3 dissoloves in aqueous NaOH to give :
Cr(OH)3
CrO2−4
Cr2O2−7
Cr(OH)2
- Sodium Chloride
- Sodium oxide
- Sodium chromate
- Potassium Dichromate
- SO2
- S
- SO3
- H2SO4+S
- CrO2Cl2
- Cl2
- CrO5
- CrCl3
Cr2O2−7 →← 2CrO2−4 exists in
- Acidic Medium
- Basic Medium
- Neutral Medium
- Does not exist
- Sodium oxide
- Sodium chromate
- Potassium Dichromate
- Sodium dichromate
- CrOCl2
- CrCl3
- CrO2Cl2
- CrO2−4
- Sodium oxide
- Sodium dichromate
- Sodium chromate
- Mixed oxide of Sodium and Chromium