Normality

Q.

Calculate the amount of oxalic acid used to prepare 100 ml of 0.1N and 0.1M solution.

Q.

The volume of water that must be added to a mixture of 250 ml of 0.6 M HCl and 750 ml of 0.2 M HCl to obtain 0.25 M solution of HCl is

1. 200 ml

2. 750 ml

3. 100 ml

4. 300 ml

Q. 1 atom of an element weights 1.792×10^{-22}g the atomic weight of element is

Q.

Write down the steps to prepare 0.1NHCl.

Q.

Vapour density of a diatomic elementary gas is 16. The atomic mass of gas is:

1. 32

2. 64

3. 16

4. 8

Q. a sample of pure calcium weighting 1.35 g was quantitatively converted to 1.86 g of pure CaO.atomic mass of calcium i

Q.

In DNA and RNA, nitrogen atom is present in the ring system. Can Kjeldahl method be used for the estimation of nitrogen present in these? Give reasons.

Q. Find the normality of a solution prepared by dissolving 0.321 g of sodium carbonate $\left(N{a}_{2}C{O}_3\right)$ in 250 mL of water.

1. 0.53 N
2. 0.018 N
3. 0.075 N
4. 0.024 N

Q.

Calculate the Normality of a solution having 15 gm equivalents. Dissolved in 750 mL solution.

1. 15 N

2. 0.2 N

3. 20 N

4. 75 N

Q. pK_In of the indicator(behaving as weak acid) is 10. At the equivalence point pH is
A. 5 B. 10 C. 7.5 D. 7

Q.

Calculate the normality of 1.11 gm of $CaC{l}_2$ is dissolved in 250 ml solution.

1. 0.1 N

2. 0.25 N

3. 0.08 N

4. 0.3 N

Q. The volume of water to be added to $100c{m}^3$ of a $0.5$ N $H_{2}S{O}_4$ to get a decinormal solution is:

1. $200c{m}^3$
2. $300c{m}^3$
3. $400c{m}^3$
4. $500c{m}^3$

Q. Which one of the following indicators give pink colour in basic solution ?

1. Methyl orange
2. Phenolphthalein
3. Bromothymol blue
4. litmus

Q. Which of the following is the correct sequence of atomic weights of the given elements ? (1) Ni>Co>Fe (2) Fe>Co>Ni (3) Co>Fe>Ni (4) Co>Ni>Fe

Q. The diatomic molecule of an element Z has a mass of 6.31 x 10-23g. What is the atomic weight of the element Z?

Q. How are $0.50m$ ${Na}_2{CO}_3$ and $0.50M$ ${Na}_2{CO}_3$ different?

Q.

What is the normality of a $KMn{O}_4$ solution in which $15.8g$ of $KMn{O}_4$ is present in $250mL$ solution and the solution is used as an oxidant, where ${Mn{O}_4}^{-}$ is reduced to ${Mn}^{2+}$ ? (Given: molar mass of $KMn{O}_4=158gmo{l}^{-1}$ )

1. 0.4 N

2. 20 N

3. 2 N

4. 40 N

Q. 100 mL of a 1 M $H_{2}S{O}_4$ solution is mixed with 200 mL of a 0.5 M HCl solution and diluted to a final volume of 500 mL. 200 mL of this solution is further diluted with 300 ml of water. Find the normality of $H^{+}$ ions in the final solution.

1. 0.51 N
2. 0.32 N
3. 0.24 N
4. 0.16 N

Q. Normality of 2M sulphuric acid is

1. $2N$
2. $4N$
3. $\frac{N}{2}$
4. $\frac{N}{4}$

Q. What is the normality of a 1 M solution of $H_{3}P{O}_4$

1. 0.5 N
2. 1.0 N
3. 2.0 N
4. 3.0 N

Q. What will be the normality of a solution obtained by mixing $100mL0.1NHCl$ and $200mL0.25NHN{O}_3$ ?

1. $0.2N$
2. $0.52N$
3. $0.50N$
4. $0.10N$

Q. $1\text{L}$ of a $\frac{N}{2}HCl$ solution is heated in a beaker. It was observed that when the volume of the solution was reduced to $600\text{mL}$, $3.25\text{g}$ of $HCl$ is lost. Calculate the normality of the new solution.

1. $1.70\text{N}$
2. $0.685\text{N}$
3. $0.342\text{N}$
4. $0.171\text{N}$

Q. The strength of a mixture of HCl & $H_{2}S{O}_4$ is 0.1 N. On treatment with an excess of $AgN{O}_3$ solution, 20 mL of this acid mixture gives 0.1435 g of AgCl. The strength of the $H_{2}S{O}_4$ is

1. 24.5 g/L
2. 2.45 g/L
3. 49 g/L
4. 4.9 g/L

Q. Normality of 2M sulphuric acid is

1. $2N$
2. $4N$
3. $\frac{N}{2}$
4. $\frac{N}{4}$

Q. 33. an element X forms atomic mass of 40g/mol having fcc structure has unit cell edge length of 400pm calculate density of X and the number of unit cells in 4g of X?

Q. 29. What are the masses of different elements in 40g Al2(SO4)3?

Q.

5 ml of N HCl, 20 ml of $N/2H_{2}S{O}_4$ and 30 ml of $N/3HN{O}_3$ are mixed together and volume made to one litre. The normality of the resulting solution is

1. $\frac{N}{5}$
2. $\frac{N}{10}$
3. $\frac{N}{20}$
4. $\frac{N}{40}$

Q. 37. The atomic weight of two elements A and B are 40 and 80 respectively. if x gram of A contains Y atoms how many atoms are present in 2 X gram of B?

Q. 44. Approx atomic weight of an element is 26.89. If its equivalent weight is 8.9. The exact atomic weight of an element would be? (1) 26.89 (2) 8.9 (3) 17.8 (4) 26.7

Q. The amount of heat evolved when 0.50 mole of $HCl$ is mixed with 0.30 mole of NaOH solution is :QUEUE

1. 17.13 kJ
2. 57.1 kJ
3. 11.42 kJ
4. 28.55 kJ