Some Basic Concepts of Chemistry - Test 1Contact Number: 9667591930 / 8527521718

Page:

What volume of H_{2} is liberated under similar conditions which released 2.24 dm^{3} O_{2} by electrolysis of water?

(1) 2.24 dm^{3}

(2) 1.12 dm^{3}

(3) 4.48 dm^{3}

(4) 0.56 dm^{3}

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

Fe_{2}O_{3}+3CO$\to $2Fe+3CO_{2}

(1) 16.8 dm^{3}

(2) 67.2 dm^{3}

(3) 22.4 dm^{3}

(4) 44.8 dm^{3}

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 Haber's process N_{2}+3H_{2} $\to $ 2NH_{3}, starting with 5L of N_{2} at STP and 5L of H_{2}, the limiting reagent will be

1. N_{2}

2. H_{2}

3. Both N_{2} and H_{2}

4. Neither N_{2} nor 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 H_{2} is treated with x mole O_{2} 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 (CH_{2}=CH_{2})

(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 H_{2}CO_{3} forms 100 milliequivalent of NaHCO_{3}. The value of x would be:

1. 4

2. 8

3. 10

4. 12

*If above link doesn't work, please go to test link from where you got the pdf and fill OMR from there

CLICK HERE to get FREE ACCESS for 2 days of ANY NEETprep course