Chemical Arithmetic Test 1

Total Questions:50 Total Time: 60 Min



Questions 1 of 50

Question:A picometre is written as

Answers Choices:

\({10^{ - 9}}\)m

\({10^{ - 10}}\)m

\({10^{ - 11}}\)m

\({10^{ - 12}}\)m

Questions 2 of 50

Question:One atmosphere is equal to

Answers Choices:

101.325 K pa

1013.25 K pa


None of these

Questions 3 of 50

Question:Dimensions of pressure are same as that of

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Energy per unit volume

Force per unit volume

Questions 4 of 50

Question:The prefix \({10^{18}}\) is

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Questions 5 of 50

Question:81.4 g sample of ethyl alcohol contains 0.002 g of water. The amount of pure ethyl alcohol to the proper number of significant figures is

Answers Choices:

81.398 g

71.40 g

91.4 g

81 g

Questions 6 of 50

Question:The unit J \(P{a^{ - 1}}\)is equivalent to

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None of these

Questions 7 of 50

Question:From the following masses, the one which is expressed nearest to the milligram is

Answers Choices:

16 g

16.4 g

16.428 g

16.4284 g

Questions 8 of 50

Question:The number of significant figures in \(6.02 \times {10^{23}}\)is

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Questions 9 of 50

Question:Avogadro number is

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Number of atoms in one gram of element

Number of millilitres which one mole of a gaseous substances occupies at NTP

Number of molecules present in one gram molecular mass of a substance

All of these

Questions 10 of 50

Question:Different propartions of oxygen in the various oxides of nitrogen prove the

Answers Choices:

Equivalent proportion

Multiple proportion

Constant proportion

Conservation of matter

Questions 11 of 50

Question:Two elements X and Y have atomic weights of 14 and 16. They form a series of compounds A, B, C, D and E in which the same amount of element X, Y is present in the ratio 1 : 2 : 3 : 4 : 5. If the compound A has 28 parts by weight of X and 16 parts by weight of Y, then the compound of C will have 28 parts weight of X and

Answers Choices:

32 parts by weight of Y

48 parts by weight of Y

64 parts by weight of Y

80 parts by weight of Y

Questions 12 of 50

Question:Carbon and oxygen combine to form two oxides, carbon monoxide and carbon dioxide in which the ratio of the weights of carbon and oxygen is respectively 12 : 16 and 12 : 32. These figures illustrate the

Answers Choices:

Law of multiple proportions

Law of reciprocal proportions

Law of conservation of mass

Law of constant proportions

Questions 13 of 50

Question:Which property of an element is always a whole number

Answers Choices:

Atomic weight

Equivalent weight

Atomic number

Atomic volume

Questions 14 of 50

Question:Which one of the following properties of an element is not variable

Answers Choices:


Atomic weight

Equivalent weight

All of these

Questions 15 of 50

Question:The modern atomic weight scale is based on

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Questions 16 of 50

Question:1 amu is equal to

Answers Choices:

\(\frac{1}{{12}}{\rm{of }}C - 12\)

\(\frac{1}{{14}}{\rm{of O - 16}}\)

\(1g{\rm{ of }}{H_2}\)

\(1.66 \times {10^{ - 23}}\)kg

Questions 17 of 50

Question:7.5 grams of a gas occupy 5.8 litres of volume at STP the gas is

Answers Choices:





Questions 18 of 50

Question:The number of atoms in 4.25 g of \(N{H_3}\)is approximately

Answers Choices:

\(1 \times {10^{23}}\)

\(2 \times {10^{23}}\)

\(4 \times {10^{23}}\)

\(6 \times {10^{23}}\)

Questions 19 of 50

Question:One litre of a gas at STP weight 1.16 g it can possible be

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Questions 20 of 50

Question:The vapour density of a gas is 11.2. The volume occupied by 11.2 g of the gas at ATP will be

Answers Choices:

11.2 L

22.4 L

1 L

44.8 L

Questions 21 of 50

Question:How much coulomb charge is present on 1g ion of \({N^{3 - }}\)

Answers Choices:

\(2.894 \times {10^5}\)Couloumb

\(6.6 \times {10^6}\)Couloumb

\(8.2 \times {10^6}\)Couloumb

\(5.2 \times {10^6}\)Couloumb

Questions 22 of 50

Question:Ratio of \({C_p}\)and \({C_v}\)of a gas X is 1.4, the number of atom of the gas ‘X’ present in 11.2 litres of it at NTP will be

Answers Choices:

\(6.02 \times {10^{23}}\)

\(1.2 \times {10^{23}}\)

\(3.01 \times {10^{23}}\)

\(2.01 \times {10^{23}}\)

Questions 23 of 50

Question:If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Answers Choices:

Decrease twice

Increase two fold

Remain unchanged

Be a function of the molecular

mass of the substance

Questions 24 of 50

Question:What should be the equivalent weight of phosphorous acid, if P=31; O=16; H=1

Answers Choices:




None of these

Questions 25 of 50

Question:One gram of hydrogen is found to combine with 80g of bromine one gram of calcium valency=2 combines with 4g of bromine the equivalent weight of calcium is

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Questions 26 of 50

Question:The equivalent weight of \(MnS{O_4}\)is half its molecular weight when it is converted to

Answers Choices:




\(MnO_4^{2 - }\)

Questions 27 of 50

Question:\(100\;mL\) of \(P{H_3}\) on decomposition produced phosphorus and hydrogen. The change in volume is

Answers Choices:

\(50\;mL\) increase

\(500\;mL\) decrease

\(900\;mL\) decrease


Questions 28 of 50

Question:\(12g\)of \(Mg\) (at. mass 24) on reacting completely with acid gives hydrogen gas, the volume of which at STP would be

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Questions 29 of 50

Question:Number of gm of oxygen in 32.2 g \(N{a_2}S{O_4}.10{H_2}O\)is

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Questions 30 of 50

Question:250 ml of a sodium carbonate solution contains 2.65 grams of \(N{a_2}C{O_3}\). If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution (mol. wt. of \(N{a_2}C{O_3}\)=106)

Answers Choices:

0.1 M

0.001 M

0.01 M

\({10^{ - 4}}\,\)M

Questions 31 of 50

Question:A molar solution is one that contains one mole of a solute in

Answers Choices:

1000 g of the solvent

One litre of the solvent

One litre of the solution

22.4 litres of the solution

Questions 32 of 50

Question:The number of oxygen atoms in 4.4 g of \(C{O_2}\)is approx.

Answers Choices:

\(1.2 \times {10^{23}}\)

\(6 \times {10^{22}}\)

\(6 \times {10^{23}}\)

\(12 \times {10^{23}}\)

Questions 33 of 50

Question:How many molecules are present in one gram of hydrogen

Answers Choices:

\(6.02 \times {10^{23}}\)

\(3.01 \times {10^{23}}\)

\(2.5 \times {10^{23}}\)

\(1.5 \times {10^{23}}\)

Questions 34 of 50

Question:The total number of gm-molecules of \(S{O_2}C{l_2}\) in \(13.5g\) of sulphuryl chloride is

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Questions 35 of 50

Question:The largest number of molecules is in

Answers Choices:

\(34g\) of water

\(28g\) of \(C{O_2}\)

\(46g\) of \(C{H_3}OH\)

\(54g\) of \({N_2}{O_5}\)

Questions 36 of 50

Question:The number of moles of sodium oxide in \(620g\) of it is

Answers Choices:

1 mol

10 moles

18 moles

100 moles

Questions 37 of 50

Question:In which of the following pairs of compounds the ratio of C, H and O is same

Answers Choices:

Acetic acid and methyl alcohol

Glucose and acetic acid

Fructose and sucrose

All of these

Questions 38 of 50

Question:How much of NaOH is required to neutralise 1500 \(c{m^3}\)of 0.1 \(N\,HCl\) (Na = 23)

Answers Choices:

40 g

4 g

6 g

60 g

Questions 39 of 50

Question:How much water should be added to 200 c.c of semi normal solution of \(NaOH\)to make it exactly deci normal

Answers Choices:

200 cc

400 cc

800 cc

600 cc

Questions 40 of 50

Question:2.76 g of silver carbonate on being strongly heated yield a residue weighing

Answers Choices:

2.16 g

2.48 g

2.64 g

2.32 g

Questions 41 of 50

Question:The solution of sulphuric acid contains 80% by weight \({H_2}S{O_4}\). Specific gravity of this solution is 1.71. Its normality is about

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Questions 42 of 50

Question:Mohr's salt is dissolved in dil. \({H_2}S{O_4}\) instead of distilled water to

Answers Choices:

Enhance the rate of dissolution

Prevent cationic hydrolysis

Increase the rate of ionization

Increase its reducing strength

Questions 43 of 50

Question:Acidified potassium permanganate solution is decolourised by

Answers Choices:

Bleaching powder

White vitriol

Mohr's salt

Microcosmic salt

Questions 44 of 50

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

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Questions 45 of 50

Question:In the preceeding question, the amount of \(N{a_2}C{O_3}\) present in the solution is

Answers Choices:

2.650 g

1.060 g

0.530 g

0.265 g

Questions 46 of 50

Question:How many ml of 1 (M) \({H_2}S{O_4}\) is required to neutralise 10 ml of 1 (M) NaOH solution

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Questions 47 of 50

Question:Which of the following cannot give iodometric titrations

Answers Choices:

\(F{e^{3 + }}\)

\(C{u^{2 + }}\)

\(P{b^{2 + }}\)

\(A{g^ + }\)

Questions 48 of 50

Question:A solution of 10 ml \(\frac{M}{{10}}FeS{O_4}\)was titrated with \(KMn{O_4}\)solution in acidic medium. The amount of \(KMn{O_4}\)used will be

Answers Choices:

5 ml of 0.1 M

10 ml of 1.1 M

10 ml of 0.5 M

10 ml of 0.02 M

Questions 49 of 50

Question:1.12 ml of a gas is produced at STP by the action of 4.12 mg of alcohol, with methyl magnesium iodide. The molecular mass of alcohol is

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Questions 50 of 50

Question:The simplest formula of a compound containing 50% of element X (atomic mass 10) and 50% of element Y (atomic mass 20) is

Answers Choices: