Molarity

Q.

What is the unit of molarity?

Q.

If $18\mathrm{g}$ glucose is present in $1000\mathrm{g}$ of solvent, the solution is said to be?

Q.

Calculate the molarity of KOH in a solution prepared by dissolving 5.6 gm in enough water to form 500 mL of solution.

1. 2 M

2. 0.2 M

3. 5.6 M

4. 500 M

Q.

What is the concentration of the solution obtained when 40 g of NaOH is dissolved in 1 L of water?

1. 0.5 M

2. 1 M

3. 5 M

4. 2 M

Q.

Calculate the percentage of water in ferrous sulphate crystals [Fe = 56, S = 32, O = 16, H = 1].

Q.

The condition in Boyle's law is that the ________ is constant.

1. volume

2. density

3. pressure

4. temperature

Q.

Which of the following is termed as the amount of solute dissolved in a given amount of solvent?

1. Solubility of solvent

2. Concentration of solution

3. Solubility of solution

4. Concentration of solute

Q. What is the molarity (M) of the solution, when 2 moles of solute is dissolved in 1 L of solution?

1. 2

Q. How many moles are present in 5.0 litre of 0.4 M ${\text{H}}_2{\text{SO}}_4$ solution?

1. 2.0 Mole
2. 0.4 mole
3. 5.0 mole
4. 2.0 mole

Q. The number of moles of sodium carbonate (Na₂CO₃) present in 10 L of 2 M solution is .

1. 20
2. 2
3. 10

Q. The molarity of a solution when 245 g of H₂SO₄ is dissolved in 1 L of solution is .

1. 2.5
2. 9.6
3. 10

Q.

A solution containing a large amount of solute is known as __.

Q.

Molarity of a solutions relates the_______

Q.

What is the effect of temperature on solubilty of solid in a liquid?

Q.

Calculate the molarity of a solution containing 5 g of NaOH in 450 ml

Q.

A molecule of hydrogen has ___________.

Q.

Match the following compounds with their molecular mass.

(i) ${\text{SO}}_2$ (ii) ${\text{CO}}_2$ (iii) ${\text{NO}}_2$ (iv) ${\text{H}}_2\text{O}$

(a) 44 u (b) 64 u (c) 18 u (d) 46 u

1. (i)- (a), (ii)- (d), (iii)- (b), (iv)- (c)

2. (i)- (b), (ii)- (a), (iii)- (d), (iv)- (c)

3. (i)- (c), (ii)- (d), (iii)- (b), (iv)- (a)

4. (i)- (b), (ii)- (d), (iii)- (a), (iv)- (c)

Q. The mass of solute dissolved in a specific volume of a solution is known as the _____ of the solution

1. Strength of a solution
2. Molarity of a solution
3. Volume of a solution
4. Molar volume of a solution

Q.

The quantity of solute present in a given amount of solution represents :

1. Concentration

2. Saturation

3. Unsaturation

4. Solubility

Q.

The gram molecular mass of water is 18 g. The number of water molecules present in 60 g of water is:

1. $10.02\times {10}^{23}$

2. $40.10\times {10}^{23}$

3. $20.05\times {10}^{23}$

4. $6.68\times {10}^{23}$

Q. The density of a 2.03 M solution of acetic acid (molecular mass 60) in water is $1.017g/mL$. Calculate the molality of the solution.

Q. The hydrated salt, $N{a}_{2}S{O}_4.n{H}_{2}O$ undergoes $56$% loss in weight on heating and become anhydrous. The value of $n$ will be:

1. $5$
2. $3$
3. $7$
4. $10$

Q. What is the mole fraction of the solute in a 1.00 m agueous solution?

1. 0.0177
2. 0.177
3. 1.77
4. 0.0354

Q. Calculate the mass of $N{a}_{2}C{O}_3$ required to prepare $250ml$ of $0.5N$ solution.

Q. The molarity of a solution obtained by mixing $800mL$ of $0.5M$ $HCl$ with $200mL$ of $1M$ $HCl$ will be:

1. $0.8M$
2. $0.6M$
3. $0.4M$
4. $0.2$M

Q. What volume of $96\%H_{2}S{O}_4$ solution (density 1.83 g/mL) is required to prepare 4 litre of 3.0 M $H_{2}S{O}_4$ solution?

1. 650 mL
2. 600 mL
3. 570 mL
4. 500 mL

Q.

Is 1M concentrated?

Q. An excess $KI$ solution is mixed in a solution of $K_{2}C{r}_2{O}_7$ and liberated iodine required $72mL$ of $0.05NN{a}_2{S}_2{O}_3$ for complete reaction. How many grams of $K_{2}C{r}_2{O}_7$ were present in the solution of $K_{2}C{r}_2{O}_7$? The reaction occurs as:
${C{r}_2{O}_7}^{2-}+6I^{-}+14H^{+}\to 2C{r}^{3+}+3I_2+7H_{2}O$

Q. The composition of a sample of wustite is ${Fe}_{0.93}O$. what percentage of the iron is present in the form of $Fe$ (III)?

1. 23.60%
2. 15.05%
3. 5%
4. 7.08%

Q. A solution containing one mole of a solute dissolved in $1000g$ of solvent is :

1. a normal solution
2. a molal solution
3. a molar solution
4. a saturated solution