Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202431 Jan 2024Morning ShiftChemistryPractical ChemistryActual

Molar mass of the salt from NaBr , NaNO 3 , KI and CaF 2 which does not evolve coloured vapours on heating with concentrated H 2 SO 4 is ____ g mol – 1 , (Molar mass in g mol – 1 : Na : 23 , N : 14 , K : 39 , O : 16 , Br : 80 , I : 127 , F : 19 , Ca : 40 )

Correct answer

0

Step-by-step solution

On heating NaBr with concentrated sulphuric acid gives brown colour bromine vapours. On heating NaNO 3 with concentrated sulphuric acid will release a brown colour NO 2 gas On heating I - with concentrated sulphuric acid gives a dark purple colour. On heating with concentrated sulphuric acid with CaF 2 does not give any colour because it produces colourless hydrogen fluoride.Molar mass of CaF 2 is 78 . 07 g / mol

Practice Practical Chemistry on Quantrex Academy →

More from Practical Chemistry

Passage: Consider the following reaction sequence in which J , K , L and M are the major products. Given: Atomic mass (in amu): H : 1 , C : 12 , N : 14 , O : 16 , S : 32 , Br : 80 2026Among Fe³⁺ , Pb²⁺ , Cu²⁺ and Mn²⁺ , identify the one that gets precipitated out while passing H₂S in presence of NH₄OH as group reagent. The highest possible oxidation state of the 2026Among Fe²⁺, Fe³⁺, Cr²⁺ and Zn²⁺ , the ion that shows positive borax bead test and with highest ionisation enthalpy is: 2026A salt with few drops of conc. HCl gives apple green colour in flame test. The group precipitate of the salt is dissolved in acetic acid and treated with K₂CrO₄ to give yellow prec 2026A student has been given 0.314 g of an organic compound and asked to estimate Sulphur. During the experiment, the student has obtained 0.4813 g of barium sulphate. The percentage o 2026In the Group analysis of cations, Ba ²⁺ ~ &~ Ca ²⁺ are precipitated respectively as 2026Consider three metal chlorides x , y and z, where x is water soluble at room temperature, y is sparingly soluble in water at room temperature and z is soluble in hot water. x , y a 2026By usual analysis, 1.00 g of compound ( X ) gave 1.79 g of magnesium pyrophosphate. The percentage of phosphorus in compound (X) is : (nearest integer) (Given, molar mass in g mol 2026 Full Practical Chemistry list All JEE Main PYQs