A. Tincal
B. Boric acid
C. Calcium carbonate
D. Colemanite
✅ The correct answer is option A.
Chemistry MCQs
Every sample of matter with uniform properties and fixed composition is called
A. Solute
B. Solvent
C. Solution
D. Phase
✅ The correct answer is option D.
The residence time of methane in the atmosphere is
A. 3 – 7 days
B. 2 -3 days
C. 3 – 7 years
D. 2 – 3 years
✅ The correct answer is option C.
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
✅ The correct answer is option B.
Which of the following technique is used for the separation of insoluble particles from liquids?
A. Filtration
B. Crystallization
C. Solvent extraction
D. Chromatography
✅ The correct answer is option A.
A major cause of SO2 on a global scale is
A. Volcanoes
B. Electric sparks
C. Combustion
D. All
✅ The correct answer is option A.
Which of the following does not give Borax bead test?
A. Cu
B. Cr
C. Ni
D. A1
✅ The correct answer is option D.
Which of the following way in used for classification of chromatography?
A. Shape
B. Phase
C. Mechanism
D. All
✅ The correct answer is option D.
Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing
A. NH2Cl
B. NHCI2
C. NCI2
D. All of the above
✅ The correct answer is option D.
The special feature of borate glass is that it is
A. Heat resistant
B. Low melting
C. Used to prepare the chemical garden
D. Green in colour
✅ The correct answer is option A.