
mole concept
Quiz
•
Chemistry
•
1st Grade
•
Practice Problem
•
Hard
sajal jindal
Used 5+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Two elements A and B combine to form compound X and Y. For the fixed mass of A, masses of B combined for the compounds X and Y are in 3:7 ratio. If in compound X, 4g of A combines with 12g of B, then in compound Y, 8g of A combines with..............g of B.
24
56
28
8
2.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
If isotopic distribution of C12 and C14 is 98% and 2%, respectively, then the number of C14 atoms in 12g of carbon is
1.032 * 1022
1.20* 1022
5.88* 1023
6.02*1023
3.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
What should be the density of an aqueous solutionof urea(molar mass=60g/mol) such that the molality as well as molarity of the solution becomes equal to unity?
1.0g/ml
1.6g/ml
1.06g/ml
1.16g/ml
4.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
A volume of 500 ml of a 0.1 M solution of AgNO3 is added to 500ml of 0.1 M solution of KCl. The concentration of nitrate ion in the resulting solution is
0.05 M
0.1 M
0.2 M
Reduced to zero
5.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
How much BaCl2 would be needed to make 250ml of a solution having the same concentration of Cl- as one containing 3.78g NaCl per 100 ml? (Ba=137)
16.8g
67.2 g
33.6g
22.4g
6.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
How many grams of solute should be added to 100g water to get a solution of density 1.2g/ml and strength 5%(w/v)?
5g
6g
4.75g
4.35g
7.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
A gaseous alkane is exploded with oxygen. The volume of O2 for complete combustion to volume of CO2 formed is in 7:4 ratio. The molecular formula of alkane is
CH4
C3H8
C2H6
C4H10
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