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What volume of H₂ is liberated under similar conditions which released 2.24 dm³ O₂ by electrolysis of water?
(1) 2.24 dm³
(2) 1.12 dm³
(3) 4.48 dm³
(4) 0.56 dm³

How many moles of sodium carbonate is formed by decomposing 0.2 mole sodium
bicarbonate completely?
1. 0.1
2. 0.2
3. 0.4
4. 0.05

200 ml of 1 M HCl solution is diluted so that the final molarity is 0.5 M. The volume of water added for dilution is
(1) 100
(2) 400
(3) 200
(4) 50

The molarity of the solution obtained by adding 5 grams of NaOH to 200 ml of water is:
1. 1.043 M
2. 1.725 M
3. 0.825 M
4. 0.625 M

Find the volume of CO required to reduce 0.25 mole ferric oxide as per the given equation
Fe₂O₃+3CO$\to$2Fe+3CO₂
(1) 16.8 dm³
(2) 67.2 dm³
(3) 22.4 dm³
(4) 44.8 dm³
 

What is the mass % of a solute in the solution obtained by dissolving 8 g of solute in 60 g of water?
1. 4.57%
2. 9.1%
3. 11.76%
4. 12.78%

In the Haber process reaction, \(\text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3\) , starting with 5 L of \( \text{N}_2 \) at STP and 5 L of  \(\text{H}_2 \), which of the following is the limiting reagent?
1. \( \text{N}_2 \)
2. \(\text{H}_2 \)
3. Both \( \text{N}_2 \) and \(\text{H}_2 \) 
4. Neither \( \text{N}_2 \) nor \(\text{H}_2 \)

50 g of a sample of Ca${\left(OH\right)}_2$ ¡s dissolved in 50 ml of O.5N HCl solution. The excess of HCl was neutrilized by 0.3N NaOH. The volume of NaOH used was 20cc. Calculate the percentage purity of Ca${\left(OH\right)}_2$
($M_{ca}$=40, $M_0$ = 16, $M_H$ = 1)
1. 14%
2. 1.4%
3. 0.14%
4. None of these

${\mathrm{H}}_2+{\mathrm{O}}_2\to {\mathrm{H}}_2{\mathrm{O}}_2$
3 mole H₂ is treated with x mole O₂ to form 85 gm of ${\mathrm{H}}_2{\mathrm{O}}_2$. What is the value of x?
1. 2.5
2. 3
3. 3.5
4. 4

Which of the following has maximum number of moles?
1. $1 \mathrm{g} {\mathrm{H}}_2$
2. $5.6 \mathrm{lit}. {\mathrm{SO}}_2 \mathrm{at} \mathrm{NTP}$
3. 18 g gulcose
4. $3.011\times {10}^{22} {\mathrm{N}}_2 \mathrm{molecule}$

25 ml of a solution containing HCl and ${\mathrm{H}}_2{\mathrm{SO}}_4$ required 10 ml of a 1 N NaOH solution for neutralization. 20 ml of the same acid mixture on being treated with an excess of ${\mathrm{AgNO}}_3$ gives 0.1435 g of AgCl. The normality of HCl and normality of the ${\mathrm{H}}_2{\mathrm{SO}}_4$ are respectively
1. 0.40 N and 0.05 N
2. 0.05 N and 0.35 N
3. 0.05 N and 0.25 N
4. 0.40 N and 0.5 N 

x g of NaHCO3 is treated with 600 ml of $\frac{\mathrm{N}}{2}$ HCl and the excess of HCl is further neutralized by 100 ml of $\frac{\mathrm{N}}{2}$ NaOH. 
Then the value of x would be
(1) 60
(2) 40
(3) 31
(4) 21

How much minimum volume of oxygen will be required for complete combustion of 60 ml of ethylene enter (CH₂=CH₂)
(1) 150 ml
(2) 170 ml
(3) 190 ml
(4) 180 ml

x g of ${\mathrm{CaCO}}_3$ is treated with 400 ml $\frac{\mathrm{N}}{10} \mathrm{HCL}$, when all the ${\mathrm{CaCO}}_3$ is converted into ${\mathrm{CaCl}}_2$. The value of x would
1. 0.2
2. 0.8
3. 1.2
4. 2

\(NaOH\,+\,H_{2}CO_{3}\,\to \,NaHCO_{3}\,+\,H_{2}O\)
x g NaOH when treated with excess of H₂CO₃ forms 100 milliequivalent of NaHCO₃. The value of x would be:
1. 4
2. 8
3. 10
4. 12