Solutions Test 37

Result

Solutions Test 37

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Weekly Quiz Competition

Question 1
1 / -0

The solution having the highest vapour pressure is:
(assume 100% ionisation of electrolytes)

A
$$1N\ KNO_3 $$

B
$$1N\ Ba(NO_3)_2 $$

C
$$1N\ Al_2(SO_4)_3 $$

D
$$1N\ Th(NO_3)_4 $$
Question 2
1 / -0

In an oxidation-reduction reaction, $$MnO_4^-$$ ion is converted to $${ Mn }^{ +2 }$$ is the number equivalents of $${ KMnO }_{ 4 }$$ (mol. wt = 158) present in 250 ml of 0.04 M $${ KMnO }_{ 4 }$$ solution?

A
0.02

B
0.05

C
0.04

D
0.07

Solution
Question 3
1 / -0

A certain compound contains only Carbon and Oxygen. Analysis show that there is $$36$$% carbon and the rest is oxygen in the compound. If its molecular mass is 400, then what is the molecular formula of the compound? [atomic weight of (C)=12 and oxygen(O)=16.]

A
$$C_{12}O_{16}$$

B
$$C_{12}O_{14}$$

C
$$C_{10}O_{16}$$

D
$$C_{11}O_{16}$$
Question 4
1 / -0

The vapour pressure of 3 aqueous solutions $$S_{1}, S_{2}$$ and $$ S_{3}$$ of the same solute at different concentrations are plotted against temperature in Kelvin. The order of their concentrations is:

A
$$S_{1} = S_{2} = S_{3}$$

B
$$S_{1} < S_{2} < S_{3}$$

C
$$S_{3} < S_{2} < S_{1}$$

D
$$S_{1} < S_{3} < S_{2}$$
Question 5
1 / -0

The volume of water added to $$500 \mathrm { ml } , 0.5 \mathrm { M }$$ $$\mathrm { NaOH }$$ so that its strength becomes 10$$\mathrm { mg } \mathrm \ { NaOH }$$ per $$\mathrm { ml } .$$

A
$$100 \mathrm { ml }$$

B
$$200 \mathrm { ml }$$

C
$$250 \mathrm { ml }$$

D
$$500 \mathrm { ml }$$
Question 6
1 / -0

20 mL of HC1 solution requires 29.85 ml.of 0.01M NaOH solution for complete neutralization.

A
0.0099

B
0.099

C
0.99

D
9.9
Question 7
1 / -0

Find the number of gram molecules of hydrogen present in 1 gram molecule of methane gas .

A
1

B
2

C
4

D
8
Question 8
1 / -0

The vapour pressure of benzene at a certain temperature is 640 mm of Hg. A nonvolatile electrolyte solute weighing 2.175 g is added to 30.08 g of benzene. If the vapour pressure of the solution is 600 mm of Hg, what is the molecular weight of the solid substance?

A
$$79.82\ u$$

B
$$84.46\ u$$

C
$$59.60\ u$$

D
$$49.50\ u$$

Solution
Question 9
1 / -0

$$1.0 \mathrm{g} $$ of magnesium is burnt with $$0.56 \mathrm{g} $$ of oxygen in a closed vessel. Which reactant is left in excess and how much?
(At. weight of $$ \mathrm{Mg}=24, \mathrm{O}=16 ) $$

A
$$Mg$$, $$0.16 g $$

B
$$ O_{2}$$, $$0.16 g $$

C
$$ \mathrm{Mg}, 0.44 \mathrm{g} $$

D
$$ O_{2}$$, $$0.28 g $$

Solution
Question 10
1 / -0

Oleum is composed of $$ \mathrm{H}_{2} \mathrm{SO}_{4} $$ and which constituent?

A
$$
S O_{2}
$$

B
$$
S O_{3}
$$

C
$$
H_{2} S
$$

D
$$
\mathrm{HSO}_{4}^{(-)}
$$

Solution