Which of the following has maximum mass?

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Aayush Asked Jan 31

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Aayush Asked Feb 1

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Caffeine has a molecular weight of 194 . It contains about 30% by mass of nitrogen. The number of atoms of nitrogen in one molecule of it is :

Aayush Asked Feb 1

by Aayush

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ALOK_RAJ Asked Aug 18, 2023

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Which of the following molarity values of ions in an aqueous solution containing 5.85 % w/v NaCl , 5.55 % w/v CaCl2 and 6% w/v NaOH is/are correct :

ALOK_RAJ Asked Aug 18, 2023

by ALOK_RAJ

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Aayush Asked Feb 1

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An organic compound on analysis was found to contain 0.032% of Sulphur by mass. The molecular mass of the compound, if its one molecule contains two Sulphur atoms, is :

Aayush Asked Feb 1

by Aayush

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Aayush Asked Jan 31

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A sample of oxygen containing 4/Ν_Α mol of oxygen is represented on a Y-map where its volume at NTP, mass of the sample and number of particles are shown. Study the map & choose the correct option.

Aayush Asked Jan 31

by Aayush

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Aayush Asked Jan 31

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1.5 x 10^22 atoms of an element weight about 0.9 g. The atomic mass of the element (in amu) is —

Aayush Asked Jan 31

by Aayush

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ANAND_YADAV Asked Jul 30, 2023

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61.25% (w/w) H2SO4 stock solution has a density of $1.6 g mL ^{-1}$. The molecular weight of H2SO4 is $98 g mol ^{-1}$. The volume $( mL )$ of stock solution required to prepare a 200 mL solution of 0.3 M H2SO4 is :

ANAND_YADAV Asked Jul 30, 2023

by ANAND_YADAV

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Aayush Asked Feb 1

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Calculate individual and average oxidation number (if required) of the marked element of the following compounds.

Aayush Asked Feb 1

by Aayush

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ALOK_RAJ Asked Aug 19, 2023

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What approximate volume of 0.40 M Ba(OH)2 solution must be added to 50.0 mL of 0.30 M NaOH solution to get a solution in which the molarity of the OH− ions is 0.50 M?

ALOK_RAJ Asked Aug 19, 2023

by ALOK_RAJ

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Aayush Asked Feb 1

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The density of water at $4^{\circ} C$ is $1 \times 10^{3} kg m ^{-3}$. Assuming no empty space to be present between water molecules, the volume occupied by one molecule of water is approximately :

Aayush Asked Feb 1

by Aayush

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Chandan Asked Aug 26, 2023

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The curve of pressure volume (PV) against pressure (P) of the gas at a particular temperature is as shown, according to the graph which of the following is incorrect (in the low pressure region):

Chandan Asked Aug 26, 2023

by Chandan

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Chandan Asked Aug 9, 2023

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Which of the following is correct order of temperature shown in the above graph Z Vs P for the same gas:

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

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For a real gas under low pressure conditions, which of the following graph is correct?

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

94 views

2KI + I2 + 22 HNO3 $\rightarrow$ 2HIO3 + 2KIO3 + 22NO2 + 10H2O ; If 3 mole of KI & 2 moles I2 are reacted with excess of HNO3. Volume of NO2 gas evolved at NTP is

Chandan Asked Aug 9, 2023

by Chandan

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ANAND_YADAV Asked Jul 30, 2023

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Arsenic estimation can be done by Bettendorff's process. The reaction is given below:

ANAND_YADAV Asked Jul 30, 2023

by ANAND_YADAV

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ALOK_RAJ Asked Aug 31, 2023

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Which of the following statements regarding compressibility factor (Z) is/are correct :

ALOK_RAJ Asked Aug 31, 2023

by ALOK_RAJ

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Chandan Asked Aug 9, 2023

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Dissolving 120 g of urea (molar mass 60 ) in 990 g of water gave a solution of density 1.11 g / ml. Select the correct statements :

Chandan Asked Aug 9, 2023

by Chandan

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Aayush Asked Feb 2

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If 6.3 g of NaHCO3 are added to 15.0 g of CH3COOH solution, the residue is found to weight 18.0 g. What is the mass of CO2 released in this reaction?

Aayush Asked Feb 2

by Aayush

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test Asked Jun 8, 2022

101 views

The minimum molar mass of a compound containing 3.2 % oxygen by mass is

test Asked Jun 8, 2022

by test

1 Answer

2 Votes

101 Views

Shakti Asked Dec 20, 2021

157 views

A gaseous mixture is composed of equal number of moles of CH4, C2H5 and C2H2. The average molecular mass of mixture (in amu) is

Shakti Asked Dec 20, 2021

by Shakti

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4 Votes

157 Views

Shakti Asked Dec 20, 2021

57 views

5.6 liters of gas at STP are found to have a mass of $11 \mathrm{~g}$. The molecular mass of the gas is

Shakti Asked Dec 20, 2021

by Shakti

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6 Votes

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ALOK_RAJ Asked Aug 18, 2023

106 views

An ideal gas undergoes a process in which $T=T_{0}+a V^{3}$; where $T_{0}$ and 'a' are positive constants and V is molar volume. The molar volume for which pressure will be minimum is

ALOK_RAJ Asked Aug 18, 2023

by ALOK_RAJ

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AnjaliYadav Asked Sep 25, 2022

95 views

The Vander Waals constant 'a' for the gases CH4, N2, NH3 and O2 are 2.25,1.39, 4.17 and 1.3 $L ^{2}$ $atm-mol^{-2}$ respectively. The gas which shows highest critical temperature is :

AnjaliYadav Asked Sep 25, 2022

by AnjaliYadav

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Aayush Asked Feb 2

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Illustrate the law of definite proportions from the following data —

Aayush Asked Feb 2

by Aayush

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Chandan Asked Aug 26, 2023

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The time taken for effusion of 32mL of oxygen gas will be the same as the time taken for effusion of which gas sample under identical conditions :

Chandan Asked Aug 26, 2023

by Chandan

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Aayush Asked Jan 30

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A person adds 1.71 gram of sugar in order to sweeten his tea. The number of carbon atoms added are —

Aayush Asked Jan 30

by Aayush

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ALOK_RAJ Asked Aug 18, 2023

69 views

The number of moles of Phosphoric acid H3PO4 that can be produced, by allowing 0.8 moles of H2, 0.9 moles of P4 and 1 mole of O2 to combine according to the given unbalanced reaction, is :

ALOK_RAJ Asked Aug 18, 2023

by ALOK_RAJ

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ALOK_RAJ Asked Aug 18, 2023

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300 ml of 3.0 M NaCl solution is added to 200 ml of 4.0 M BaCl2 solution. The concentration of Cl− ions in the resulting solution is —

ALOK_RAJ Asked Aug 18, 2023

by ALOK_RAJ

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Chandan Asked Aug 9, 2023

119 views

Calculate the molality of the resultant solution, obtained by mixing equal volumes of 20 % (w/w) NaOH solution (d=1.2 g / mL ) and 25 %(w / w) NaOH solution (d=1.44 g / mL ). Report your answer after multiplying it by 3.4 :

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

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Haemoglobin contains 0.25 % iron by weight. The molecular weight of Hemoglobin is 89600 u. Calculate the weight of K4[ Fe (CN)_{6}] that can be produced

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

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What weight of CO is required to form Re2(CO)_{10} from 2.42 g of Re2O7 according to the given unbalanced reaction?

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

129 views

Let p and p _s the partial pressure or H2O (g) and vapour pressure of H2O (I) respectively. Then the % relative humidity is given by

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

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50g of H2 is placed in a vessel of constant volume and temperature. A hole is punctured in the vessel and left in vacuum. The pressure of H2 in the vessel will vary with time as

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

143 views

5 mL of He gas diffuses out in 1 second from a hole. Find the volume of SO2 that will diffuse out from the same hole under identical conditions in 2 seconds.

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

181 views

A4: 1 molar ratio mixture of helium and methane is contained in a vessel at 10 bar pressure. Due to a hole in the vessel, the gas mixture leaks out. The molar ratio composition of the mixture effusing out initially is :

Chandan Asked Aug 9, 2023

by Chandan

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Chandan Asked Aug 9, 2023

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The rate of effusion of helium gas at a pressure of 1000 torr is 10 torr $\min ^{-1}$. What will be the rate of effusion of hydrogen gas at a pressure of 2000 torr at the same temperature :

Chandan Asked Aug 9, 2023

by Chandan

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0 Votes

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Which of the following has maximum mass?

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