EASY
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IMPORTANT
Earn 100

Out of molarity (M), molality (m), formality (F) and mole fraction (x) those independent of temperature are:

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Important Questions on Some Basic Concepts of Chemistry

MEDIUM
JEE Main/Advance
IMPORTANT
3.0 molal NaOH solution has a density of 1.110 g/mL. The molarity of the solution is :
EASY
JEE Main/Advance
IMPORTANT
An alloy of gold and silver contains 38.5% silver by mass and has a density of 14.6 g·mL-1. What is the molar concentration of silver in this alloy:(Atomic weight of Ag-108u)
EASY
JEE Main/Advance
IMPORTANT
"Suvarnabhasm", an ayurvedic drug, is found to contain 400ppm of colloidal gold. Mass % of gold (atomic mass of Au=197 ) will be:
EASY
JEE Main/Advance
IMPORTANT
An aqueous solution of concentrated hydrobromic acid contains 48% HBr by mass. If the density of the solution is 1.50 gmL, what is its concentration :(Atomic mass of Br=79.90u,H= 1u)
EASY
JEE Main/Advance
IMPORTANT
An antifreeze mixture consists of 40% ethylene glycol C2H6O2 by weight in aqueous solution. If the density of this solution is 1.05 g/mL, what is the molar concentration :
EASY
JEE Main/Advance
IMPORTANT
XeF6 fluorinates I2 to IF7 and liberates Xenon (g). 210mmol of XeF6 can yield a maximum of -mmol of IF7 :
EASY
JEE Main/Advance
IMPORTANT
When 100 g of ethylene polymerises entirely to polyethene, the weight of polyethene formed as per the equation nC2H4-CH2-CH2-n is:
HARD
JEE Main/Advance
IMPORTANT
A 10 gram sample of natural gas containing CH4 and C2H4 was burnt in excess of oxygen to give 29.0 grams of CO2 and some water. How many grams of water are formed :