HARD

Earn 100

Specific heat of a metal is $0.031 \frac{{}^{\circ}C \times Cal}{g}$ , and its equivalent weight is $103.6$ . Calculate the exact atomic weight of the metal.

Round off your answer up to one decimal place.

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Important Questions on Some Basic Concepts of Chemistry

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

Calculate mass of

3.01 \times 10^{24}

atoms of an element having atomic mass

21.13

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

Two elements

A

and

B

which form

0.15

moles of

A_{2} B

and

{AB}_{3}

type compounds. If one mole of each

A_{2} B

and

{AB}_{3}

weigh equally, then the atomic weight of

A

is____times of atomic weight of

B

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

Which symbol replaced the unit of atomic mass, amu?

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

3 g

of acetic acid is added to

250 m L

0.1 M H C l

and the solution made up to

500 m L

. To

20 m L

of this solution

\frac{1}{2} m L

5 M N a O H

is added. The

p H

of the solution is ________
[Given:

p K a

of acetic acid

= 4.75,

molar mass of acetic acid

60 g / m o l, \log 3 = 0.4771

, Neglect any changes in volume]

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

One mole of dioxygen gas at

STP

is equal to

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

What will be the mass of one atom of

{}^{12}C

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

Consider an imaginary ion

{}_{22}^{48}X^{3 -}

. The nucleus contains '

a

%

more neutrons than the number of electrons in the ion. The value of '

a

' is

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

The unit of atomic mass,

amu

is replaced by

u

, here

u

stands for

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

The average molar mass of chlorine is

35.5 g {mol}^{- 1}

. The ratio of

{}^{35}{Cl}

{}^{37}{Cl}

in naturally occurring chlorine is close to :

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

In a certain mass spectrometer, an ion beam passes through a velocity filter consisting of mutually perpendicular fields E and B. The beam then enters a region of another magnetic field

B^{'}

, perpendicular to the beam. The radius of curvature of the resulting ion beam is proportional to

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

A certain metal forms an oxide containing

60 %

oxygen. The specific heat of the metal is

0.401

. Calculate the valency of the metal.

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

0.1 g

of a metal M, when dissolved in

dil HCI

evolved

124.2

ml of hydrogen at NTP. The specific heat of the metal is

0.214

. Calculate the atomic mass of the metal. What are the formulae of the oxide and chloride of the metal ?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

What is the value of atomic heat ?

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

A hydrated sulphate of a metal contained

8.1 %

of the metal and

43.2 %

{SO}_{4}^{2 -}

by weight. Assuming the specific heat of the metal to be

0.242 Cal / g,

determine the formula of the hydrated sulphate.

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

State and explain Dulong and Petit’s law. The chloride of a metal 'M' contains

23.2 %

metal. Its specific heat is

0.224

. What is the accurate atomic mass of the metal?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

What is the unit of specific heat ?

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

An element forms an oxide containing

47 %

oxygen. The specific heat of the element is

0.22

. Calculate the relative atomic mass of the element.

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

0.1082

of metal when treated with an excess of dilute

H_{2} {SO}_{4}

liberated

40.2 ml

hydrogen gas at

17 ° C and 770 mm

pressure. Aqueous tension at

17 ° C is 14.4 mm

pressure. The specific heat of the metal is

0.095

. Determine the relative atomic mass of the metal.

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

Represent the union of two sets by Venn diagram for each of the following.

$X = {x | x$ is a prime number between $80$ and $100}$

$Y = {y | y$ is an odd number between $90$ and $100}$

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Atomic and Molecular Mass

The vapour density of a volatile chloride of metal is

74.6 .

If the specific heat of the metal is

0.88 Cal / gram,

calculate the exact atomic weight of the metal and the formula of its chloride.

Specific heat of a metal is 0.031C∘×Calg, and its equivalent weight is 103.6. Calculate the exact atomic weight of the metal. Round off your answer up to one decimal place.

Important Questions on Some Basic Concepts of Chemistry

Learn and Prepare for any exam you want !

Specific heat of a metal is $0.031 \frac{{}^{\circ}C \times Cal}{g}$ , and its equivalent weight is $103.6$ . Calculate the exact atomic weight of the metal.

Round off your answer up to one decimal place.