A. Aqua regia
B. HF
C. HCL
D. HBr
Submitted by: MUHAMMAD ALI
HF reacts with the silica in glass (turns it into SiF4, which is a gas at room temperature or H2SiF6 which is a liquid), so you can’t use glass bottlesto store it in.
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A. Aqua regia
B. HF
C. HCL
D. HBr
Submitted by: MUHAMMAD ALI
HF reacts with the silica in glass (turns it into SiF4, which is a gas at room temperature or H2SiF6 which is a liquid), so you can’t use glass bottlesto store it in.
A. Water expands on freezing
B. Bottle contracts at freezing point
C. temperature outside the bottle is less than that inside the bottle.
D. None of the above
A. Jena Glass
B. Soda Glass
C. Pyrex Glass
D. Crookes Glass
Submitted by: Parvez Malik
A. It increases the supply of oxygen to the flame by convection
B. The heat produced ensures complete
C. Both to these
D. Neither of these
Submitted by: hamza
A. Quartz and Mica
B. Sand and Salt
C. Sand and Silicates
D. None of these
Submitted by: Jack Sparrow
A. Bottle glass
B. Flint glass
C. Hard glass
D. Pyrex glass
Submitted by: ABDUL HAYEE
A. Pyrex glass
B. jena glass
C. Flintglass
D. Soft glass
Submitted by: Asad Ullah Afridi
A. Kinetic energy
B. Electrical energy
C. Potential energy
D. None of these
Submitted by: Gohar Rahman
A. Liver
B. Spleen
C. Kidney
D. Heart
Submitted by: Ashfaque Ali Khoso
A. Vitamin C
B. vitamin D
C. vitamin K
D. None of these
Submitted by: Hamdam Ali
A. Light
B. Radiation
C. Sound
D. None of These
Submitted by: Salman Farooq
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