Important Question of Chemistry 11 Ch 1
Table of Contents Contents One Mark questions
with answers 1. What is the significant
figures in 1.050 x 10 4 ? Ans. Four 2. What is the S.I. unit of
Density? Ans. Kg m -3 3. What do mean by Mole
fraction? Ans. Mole Fraction is the
ratio of number of moles of one component to the total number of moles
(solute and solvents) present in the solution. It is expressed as
'x'. 4. Round off up to
3 significant figure (a) 1.235 (b) 1.225 Ans. (a) 1.24 (b) 1.22 5. What is AZT? Ans. Azidothymidine. 6. What is limiting
reagent? Ans.The reactant
which gets consumed first or limits the amount of product formed is known
as limiting reagent 7. Define one mole? Ans. One mole is
the amount of a substance that contains as many particles as there are
atoms in exactly 12 g of the carbon-12. 8. Calculate the formula mass
calcium chloride. Ans. Formula mass of CaCl 2 = 40+2 x35.5=40+71
= u 9.What is the law
called which deals with the ratios of the volumes of the gaseous
reactants and products?