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Which of the following statement is/are true?
I. Atomic radius increases in moving from left to right along a period.
II. Atomic size...
The percentage of nitrogen in urea is :
Which of the following fibers will melt when heated?
Which of the following is the lightest metal?
Which endocrine gland requires iodine to synthesize a particular hormone, whose deficiency may cause goitre disease?
Which acid is present in grapes?
Acid rain is caused due to pollution of the atmosphere by:
Which chemical is used to generate light to weld metals?
On a clean glass plate, a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
The common name of hydrogen peroxide is: