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

which of the following is a non-crystalline solid pair?
A. diamond, wood
B. glass, table salt
C. wood, glass
D. sucrose. glass
Submitted by: Akhtar Saleem Sandhu
Which of the following does not give Borax bead test ?
A. Cu
B. Cr
C. Ni
D. A1
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
Aqueous solution of borax above 62°C gives crystals of________________?
A. Na2B4O7.4H2O
B. Na2B4O7.5H2O
C. Na2B4O7.2H2O
D. Na2B4O7.10H2O
Which one does not give borax bead test_________________?
A. Copper sulphate
B. Barium sulphate
C. Cobalt sulphate
D. Nickel sulphate
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
All of the following substances are crystalline except_____________?
A. Ice
B. Diamond
C. Sucrose
D. Plastic
Submitted by: Mansoor Ul Haque
The phenomenon in which a compound exists in two or more crystalline forms is called ________________?
A. Isomorphism
B. Polymorphism
C. Anisotropy
D. Allotropy
Which of the following will not form crystalline structure with opporitely charged ions_________________?
A. H+
B. H-
C. Mg2+
D. Ca2+
What is the color of copper sulfate crystalline?
A. White
B. Brown
C. Blue
D. Green
Submitted by: Muhammad Kamal