What is wave length?
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How many elements have been discovered on the Periodic Table?
Give the others form of iron ore.
How BIS Decedied the LSF value 0.66-1.02 with calculation.
How are specific gravity and density related?
Explain the Chemical Manures ?
How is arsenic produced?
What is quick lime ?
Why is heat more oppressive on a damp hot day ?
What is the difference between iron and steel ?
At what temperature does mercury freeze ?
Why does a dog hang out his tongue, when it is hot ?
Why are the bright circles of light seem under the trees, when the sun shines?