Aqueous solution of borax above 62°C gives crystals of________________?

Related Mcqs:

1. Which one of the following gives white precipitate with aqueous solution of BaCl2?

   A. NaHCO3
   B. NaNO3
   C. Na2CO3
   D. Na2CrO4

2. When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?

   A. 0.5
   B. 1
   C. 1.5
   D. 2

3. The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?

   A. 3
   B. 2.7
   C. 2
   D. 1.5

4. Which of the following ion is stable in aqueous solution ?

   A. H+
   B. H-
   C. Cl-
   D. All are stable

5. Which of the following does not give Borax bead test ?

   A. Cu
   B. Cr
   C. Ni
   D. A1

6. Borax is a white crystalline solid and it is_________________?

   A. More soluble in cold water
   B. More soluble in hot water
   C. Insoluble in water
   D. Soluble only in organic solvents

7. The coloured glassy mass in borax bead test is due to the formation of___________________?

   A. metal borate
   B. metal meta borate
   C. metal boride
   D. metal silicate

8. Which one does not give borax bead test_________________?

   A. Copper sulphate
   B. Barium sulphate
   C. Cobalt sulphate
   D. Nickel sulphate

9. In borax bead test which compound is formed_________?

   A. Ortho burate
   B. Meta borate
   C. Double oxide
   D. Tetra borate

   Submitted by: Muhammad Ali Kunbhar

10. Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde

    A. CH₄
    B. C₂H₆
    C. C₂H₄
    D. C₂H₂

    Submitted by: Aamir khan Hullio