The specific heat of a metal is 0.16. Its approximate atomic weight would be :

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Chandan Asked Sep 29, 2023

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The vapour density of a chloride of a metal is 81.5 (H=1) and the chloride contains 34.46 % metal. The specific heat of the metal is 0.115. Calculate the exact atomic weight and molecular formula of chloride.

Chandan Asked Sep 29, 2023

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1.0g of a metallic carbonate left on ignition 0.56g of its oxide. What is the atomic weight of the metal?

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The chloride of a metal M is to contain 20.2% metal. The specific heat of the metal is 0.224.

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Chandan Asked Sep 29, 2023

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A piece of a metal weighs between 0.5g and 0.6g. When dissolved in dilute H2SO4, 196 mL of hydrogen gas is evolved at S.T.P. If the correct atomic weight of the metal is 65.2, calculate exact weight of metal dissolved in acid.

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Chandan Asked Oct 6, 2023

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0.4686g of a metal oxide yields on reduction 0.3486g of the metal which forms an alkali double sulphate isomorphous with common alum. Find the atomic weight of the metal.

Chandan Asked Oct 6, 2023

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Aayush Asked Apr 11

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The element X is trivalent. 9.0 g of the element combines with 8.0 g of oxygen. The atomic weight of X is, therefore :

Aayush Asked Apr 11

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Chandan Asked Sep 29, 2023

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1.5276g of CdCl2 was found to contain 0.9367g of cadmium. Calculate the atomic weight of cadmium.

Chandan Asked Sep 29, 2023

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ALOK_RAJ Asked Apr 3, 2021

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The oxides of two metals X and Y are isomorphous. The metal X whose atomic weight is 52 forms a chloride whose vapour density is 79.

ALOK_RAJ Asked Apr 3, 2021

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Chandan Asked Oct 6, 2023

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Cu-63 isotope is 69.09% and Cu-65, 30.91% in a copper atom. If the mass of ${ }^{63} Cu$ isotope is 62.9298 amu, what must be the mass of ${ }^{63} Cu$ isotope given that atomic mass of copper is 63.546 amu?

Chandan Asked Oct 6, 2023

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Cu2S and Ag2S are isomorphous compounds. The percentage of sulphur in Cu2S is 20.14 and that in Ag2S is 12.94. The atomic weight of copper is 63.57. Calculate the atomic weight of silver.

Chandan Asked Oct 6, 2023

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Chandan Asked Sep 29, 2023

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1.878g of a metal bromide when heated in a stream of hydrogen chloride gas is completely converted to the chloride weighing 1.00g.

Chandan Asked Sep 29, 2023

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3.7g of an oxide of a metal was heated with charcoal. The liberated CO2 was absorbed in caustic soda solution and weighed 1.0g

Chandan Asked Sep 29, 2023

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ALOK_RAJ Asked Apr 3, 2021

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Potassium sulphate is isomorphous with potassium chromate which contains 26.79 % by weight of chromium.

ALOK_RAJ Asked Apr 3, 2021

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Aayush Asked Apr 11

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1.0 g of hydrogen is heated to combine with 80.0 g of bromine and 1.0 g of calcium (valency =2) combines with 4.0 g of bromine.

Aayush Asked Apr 11

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Chandan Asked Oct 6, 2023

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It was found that 100g of silver combined with all the chlorine in 56.0g of arsenious chloride.

Chandan Asked Oct 6, 2023

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Aayush Asked Jan 4

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Calculate the number of photons emitted by a 100-W yellow lamp in 1.0 second. The wavelength of yellow light is 500 nm and assume hundred percent efficiency.

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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?

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ALOK_RAJ Asked Nov 22, 2023

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How many molecules of acetylene would be formed when 10.0g of calcium carbide is treated with water?

ALOK_RAJ Asked Nov 22, 2023

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Aayush Asked Jan 3

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The specific conductivity of an aqueous solution of a weak monoprotic acid is $0.00033$ ohm $^{-1} cm ^{-1}$ at a concentration $0.02 M$.

Aayush Asked Jan 3

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ALOK_RAJ Asked Nov 16, 2021

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If a LPG cylinder contains a mixture of butane and isobutane, then the amount of oxygen that would be required for complete combustion of 1.16 kg of mixture will be :

ALOK_RAJ Asked Nov 16, 2021

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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

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Chandan Asked Aug 22, 2023

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The speed of a certain proton is $4.5 \times 10^{5} ms ^{-1}$. If the uncertainty in its momentum is to be reduced to 0.010 percent, what uncertainty in its location must be tolerated?

Chandan Asked Aug 22, 2023

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Aayush Asked Jan 4

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For the cell prepared from electrode A and B, electrode $A : \frac{ Cr _{2} O _{7}^{2-}}{ Cr ^{3+}}, E _{\text {red. }}^{0}=+1.33 V$ and electrode $B$ : $\frac{F_{e^{3+}}^{F e^{2+}}, E_{\text {red. }}^{0}}{}=0.77 V$, which of the following statement is not correct?

Aayush Asked Jan 4

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Aayush Asked Feb 2

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0.65 g of Zn was put in a solution of 1.5 g CuSO4 and the Cu. thus precipitated weighed 0.635 g. what weight of the zinc sulphate will be recovered on evaporation of the remaining solution?

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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

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Aayush Asked Mar 1

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In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?

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The length of a rectangular plate is measured by a meter scale and is found to be $10.0 cm$. Its width is measured by vernier callipers as $1.00 cm$.

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The Young's modulus of a material of wire is 12.6 × 1011 dyne /cm2. Its value in MKS system is :

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ALOK_RAJ Asked Aug 3, 2023

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Thomas throws a silver coin in the sea. The density of the coin is 0.985 gm/m3. Will the coin float on the surface of water or it will sink?

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For the reaction : N2O4 (g) $\rightleftharpoons$ 2NO2 (g) at 360K, the value of $K _{ c }=0.4$ mole lit-1. The value of $K _{p}$ for the reaction at the same temperature would be :

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Chandan Asked Sep 12, 2023

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100 mL of air containing only oxygen and nitrogen is taken in a jar over water. NO is slowly passed till more brown fumes appear in the gas jar. It is found that 42 mL of NO is required. The percentage nitrogen in the air would be:

Chandan Asked Sep 12, 2023

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Chandan Asked Sep 11, 2023

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The value of K_p for the reaction, A(g)+2 B(g) $\rightleftharpoons$ C(g) is 25 atm $^{-2}$ at a certain temperature. The value of K_p for the reaction, $\frac{1}{2} C(g) \rightleftharpoons \frac{1}{2} A(g)+B(g)$ at the same temperature would be :

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ALOK_RAJ Asked Nov 19, 2023

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The weight of 350mL of a diatomic gas at 0°C and 2 atm pressure is 1.0 g. Calculate the weight of an atom in gram.

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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

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The specific heat of a metal is 0.16. Its approximate atomic weight would be :

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