CBSE
Multiple Choice QuestionsWhen 6 g of a monobasic acid is dissolved in 100 mL solution , it is l N. What is equivalent mass of the acid ?
20 g equiv-1
40 g equiv-1
60 g equiv-1
80 g equiv-1
Calculate the radius of a water molecule assuming to be spherical (density= 1 g mL-1) :
1.925 10-8 cm
1.925x 10-9 cm
1.925 10-10 cm
1.925 10-11 cm
Assertion : One mole of NaCl contains 6.023 1023 molecules of sodium chloride.
Reason : 58.5 g of NaCl also contains 6.023 x 1023 molecules of NaCl.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false.
The amount of BaSO4 precipitated on mixing BaCl2 (0.5 M) with H2SO4 (1 M) will correspond to
0.5 M
1.0 M
1.5 M
2.0 M
When 2.495 g of CuSO4 · x H2O (molar mass 249.5) is heated, 0.05 mole of H2O is lost. Therefore , x is :
one
three
five
seven
The number of H+ ion in half normal solution of Na2CO3 and CH3COOH :
> 10-7 m
10-7 m
< 10-7
10-5 m
100 cc of 0.6 N H2SO4 and 200 cc of 0.3 N HCl were mixed together .The normality of the solution will be :
0.2 N
0.4 N
0.8 N
0.6 N
Mass of one atom is 6.66 x 10-23 g. Its percentage in an hydride is 95.24. Thus , hydride is :
MH
MH2
MH3
MH4
For a reaction, A + 2B C, the amount of C formed by starting the reaction with 5 moles of A and 8 moles of B is :
5 mol
8 mol
16 mol
4 mol
How many significant figures are present in 0.0000135?
7
8
4
3
