Equivalent Mass

Q. 74.5 g of a metallic chloride contain 35.5 g of chlorine. The equivalent weight of the metal is

1. 19.5
2. 35.5
3. 39
4. 78

Q.

Calculate the equivalent mass of $\mathrm{HCl}$ in the given reaction : ${\mathrm{K}}_2{\mathrm{Kr}}_2{\mathrm{O}}_7+14\mathrm{HCl}\to 2\mathrm{KCl}+2{\mathrm{CrCl}}_3+3{\mathrm{Cl}}_2+{\mathrm{H}}_2\mathrm{O}$

Q. How many moles and equivalents respectively of sodium carbonate are required to completely neutralize 1 eq of HCl?

1. 0.5, 1
2. 0.5, 0.5
3. 1, 1
4. 1, 0.5

Q.

Approximate atomic weight of an element is 26.89. If its equivalent weight is 8.9, the exact atomic weight of element would be

1. 26.89
2. 8.9
3. 17.8
4. 26.7

Q.

What is the n-factor of $H_{3}B{O}_3$?

1. 1 or 2 or 3

2. 1 or 2

3. 3

4. 1

Q. Calculate the equivalent weight of sulphuric acid.
$(H=1,S=32,O=16)$

1. $39u$
2. $44u$
3. $23u$
4. $49u$

Q.

$KMn{O}_4$ reacts with ferrous ammonium sulphate according to the equation $Mn{O}_4^{-}+5F{e}^{2+}+8H^{+}\to M{n}^{2+}+5F{e}^{3+}+4H_{2}O$, here 10 ml of 0.1 M $KMn{O}_4$ is equivalent to

1. 20 ml of 0.1 M $FeS{O}_4$
2. 30 ml of 0.1 M $FeS{O}_4$
3. 40 ml of 0.1 M $FeS{O}_4$
4. 50 ml of 0.1 M $FeS{O}_4$

Q. Calculate the equivalent mass of $H_2{SO}_4$ from the given reactions.
$\left(a\right)H_2{SO}_4+NaOH\to NaH{SO}_4+H_{2}O$
$\left(b\right)H_2{SO}_4+2NaOH\to {Na}_2{SO}_4+2H_{2}O$

1. $98$ and $49$
2. $49$ and $98$
3. Both $98$
4. Both $49$

Q.

What is valency factor of acids in a given reaction?

1. Number of replaceable ions; in the solution

2. Number of ions of in solution

3. Number of ions in one molecule of acid

4. Number of gram - equivalents

Q. The equivalent weight of ${H_{3}PO}_4$ in the following reaction is:

1. $98$
2. $49$
3. $32.66$
4. $40$

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. The equivalent mass of $MnS{O}_4$ is half of its molar mass when it is converted to :

1. $M{n}_2{O}_3$
2. $Mn{O}_2$
3. $Mn{O}_4^{-}$
4. $Mn{O}_4^{2-}$

Q. $0.32$ g of a metal gave on treatment with an acid $112$ mL of hydrogen at NTP. Calculate the equivalent mass of the metal.

1. $58$
2. $32$
3. $64$
4. $24$

Q. Assertion : $H_{3}P{O}_3$ is a dibasic acid and its salt $N{a}_{3}P{O}_3$ does not exist.

1. Both Assertion and Reason are correct and Reason is correct explanation of Assertion.
   
2. Both Assertion and Reason are correct but Reason is not correct explanation of Assertion.
   
3. Assertion is correct but Reason is incorrect.
   
4. Assertion is incorrect but Reason is correct.
   

Q.

Equivalent weight of crystalline oxalic acid is

1. 30
2. 63
3. 53
4. 45

Q. If the weight of metal chloride is x gram containing y gram of metal, the equivalent weight of metal will be:

1. $E=\frac{x}{y}\times 35.5$
2. $E=\frac{8(y-x)}{x}$
3. $E=\frac{y}{x-y}\times 35.5$
4. $E=\frac{8(x-y)}{y}$

Q. The equivalent mass of $N_2{H}_4$ in the reaction, $N_2{H}_4⟶N_2$ is $16$.

1. True
2. False

Q.

What is the n-factor / valency factor of $H_{2}C{O}_3$ ?

1. 1

2. 2

3. Either a or b

4. Neither a nor b

Q.

10g of a metal carbonate on heating gives 5.6 g of its oxide. The equivalent mass of the metal is ?

1. 20

2. 40

3. 10

4. 5

Q. 200 ml of 0.5 M $H_{2}S{O}_4$ is added to 200 ml of 0.5 N $NaOH$. The solution is:

1. none of the above
2. neutral
3. acidic
4. basic

Q. $1.520$ g of the hydroxide of a metal, on ignition, gave $0.995$ g of the oxide. The equivalent weight of the metal is:

1. $1.520$
2. $0.995$
3. $19.00$
4. $9.00$

Q. When a metal burnt its weight is inccreased by $24$%, the equivalent weight of metal is:-

Q. The aqueous solution of sodium acetate is basic. Explain.

Q. $Ca(OH{)}_2+H_{3}P{O}_4\to CaHP{O}_4+2H_{2}O$ the equivalent weight of $H_{3}P{O}_4$ in the above reaction is

1. 21
2. 27
3. 38
4. 49

Q. 1.25 g of a solid dibasic acid is completely neutralised by 25 ml of 0.25 molar $Ba(OH{)}_2$ solution. Molecular mass of the acid is

1. 150
2. 120
3. 200
4. 100

Q.

$1.5276g$ of $CdC{l}_2$ was found to contain $0.9367g$ of $Cd$. Atomic weight of $Cd$ is

1. 144.5

2. 112.5

3. 122.5

4. 245

Q.

The molecular formula of a commercial resin used for exchanging ions in water softening is $C_8{H}_{7}S{O}_{3}Na$ (molecular weight = 206). What would be the maximum uptake of $C{a}^{2+}$ ions by the resin when expressed in mole per gram resin?

1. $\frac{2}{309}$

2. $\frac{1}{103}$

3. $\frac{1}{412}$

4. $\frac{1}{206}$

Q. $0.24$ g of a metal on heating in air forms $0.40$ g of metal oxide. What is equivalent weight of metal (in g/equivalent)?

1. $12$
2. $8$
3. $6$
4. None of these

Q. $x$ grams of a metal react with dilute sulphuric acid to form $y$ grams of metal sulphate. The equivalent mass of metal is:

1. $\frac{x}{y}\times 96$
2. $\frac{x}{y-x}\times 48$
3. $\frac{x}{x-y}\times 48$
4. $\frac{y}{y-x}\times 96$

Q. $H_{3}P{O}_2$ only forms $Na{H}_{2}P{O}_2$. The equivalent weight of acid (in g) is :