Strong odour in swimming pool is due to .................... .
Which of the following is a non-metallic element essential for human bone formation?
Bleaching powder is also called .................... .
Chlorine gas is a strong .................... agent.
Bleaching powder is .................... in colour.
Rock salt is .................... in colour.
Salt obtained from certain type of rock is called .................... .
The fixed number of molecules of water in alum is .................... .
Select the odd one out: Soap, Toothpaste, Baking soda, Curd.
The molten state of NaCl is also called as .................... .
Select the odd one out: Sodium sulphate, Barium chloride, Magnesium sulphate, Bleaching powder.
Select the odd one out: Strontium – 89, Strontium – 90, Radium – 223, Iodine – 123.
Select the odd one out: Boron-10, Iodine – 131, Cobalt – 60, Iodine – 123.
What is the primary component of natural gas?
Baking soda is
What is the chemical name of common salt?
.................... is known as chloride of lime.
Which substance is commonly used as a disinfectant in swimming pools?
The .................... % aqueous solution of salt is called brine.
Which gas is released during the process of photosynthesis?
What is the chemical formula of baking soda?
The molecular formula for baking soda is .................... .
During electrolysis of NaCl in the fused state .................... is formed at cathode.
Melting point of NaCl is .................... .
Soap is .................... in nature.
Molecular formula for magnesium bromide is .................... .
Substance used to make hard water soft is .................... .
NaHCO3 is also called as .................... .
Select the odd one out: Na2SO4, K3PO4, MgBr2, HCl.
Select the odd one out: Na2CO3.10H2O, Na2SO4.10H2O, BaCl2.2H2O, CaOCl2
