Chemistry-
General
Easy

Question

From the graph, which is the best reducing agent to reduce Cu2 O at high temperature

  1. Coke    
  2. CO    
  3. CO2    
  4. 1 & 2    

The correct answer is: Coke

Related Questions to study

General
chemistry-

Correct statement(s) regarding the graph

I) Above 983K, Carbon can reduce any metal oxide at high temperature and itself oxidised to CO
II) In the first reaction (Formation of CO2 from ‘C’) capital delta S to the power of 0 end exponent=0 & capital delta G to the power of 0 end exponentremains nearly same, i.e it is independent of temperature
III) In the second reaction, (formation of CO) , there is increase in entropy & capital delta S to the power of 0 end exponent=+ve&blank capital delta G to the power of 0 end exponent becomes more –ve with increase in temperature
IV) In third reaction (formation of CO2 from CO), there is a decrease in entropy capital delta S to the power of 0 end exponent=-ve & capital delta G to the power of 0 end exponent becomes less –ve with increase in temperature

Correct statement(s) regarding the graph

I) Above 983K, Carbon can reduce any metal oxide at high temperature and itself oxidised to CO
II) In the first reaction (Formation of CO2 from ‘C’) capital delta S to the power of 0 end exponent=0 & capital delta G to the power of 0 end exponentremains nearly same, i.e it is independent of temperature
III) In the second reaction, (formation of CO) , there is increase in entropy & capital delta S to the power of 0 end exponent=+ve&blank capital delta G to the power of 0 end exponent becomes more –ve with increase in temperature
IV) In third reaction (formation of CO2 from CO), there is a decrease in entropy capital delta S to the power of 0 end exponent=-ve & capital delta G to the power of 0 end exponent becomes less –ve with increase in temperature

chemistry-General
General
chemistry-

Ellingham diagram is given below for the formation of some oxides. Then select the correct combination

Ellingham diagram is given below for the formation of some oxides. Then select the correct combination

chemistry-General
General
chemistry-

From Ellingham diagram the correct statements
a) 4 C u plus O subscript 2 end subscript rightwards arrow 2 C u subscript 2 end subscript O
b) 2 C plus O subscript 2 end subscript rightwards arrow 2 C O
c) 2 Z n plus O subscript 2 end subscript rightwards arrow 2 Z n O

From Ellingham diagram the correct statements
a) 4 C u plus O subscript 2 end subscript rightwards arrow 2 C u subscript 2 end subscript O
b) 2 C plus O subscript 2 end subscript rightwards arrow 2 C O
c) 2 Z n plus O subscript 2 end subscript rightwards arrow 2 Z n O

chemistry-General
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General
physics

An artificial satellite is revolving round the earth in a circular orbit its velocity is half the escape velocity. Its height from the earth surface is .=...km

An artificial satellite is revolving round the earth in a circular orbit its velocity is half the escape velocity. Its height from the earth surface is .=...km

physicsGeneral
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physics

The escape velocity of a body from earth's surface is Vee. The escape velocity of the same body from a height equal to  from earth's surface will be

The escape velocity of a body from earth's surface is Vee. The escape velocity of the same body from a height equal to  from earth's surface will be

physicsGeneral
General
physics

Two small and heavy sphere, each of mass M, are placed distance r apart on a horizontal surface the gravitational potential at a mid point on the line joining the center of spheres is

Two small and heavy sphere, each of mass M, are placed distance r apart on a horizontal surface the gravitational potential at a mid point on the line joining the center of spheres is

physicsGeneral
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General
physics

The escape velocity of an object from the earth depends upon the mass of earth (M), its mean density ( rho ), its radius (R) and gravitational constant (G), thus the formula for escape veloctiy is

The escape velocity of an object from the earth depends upon the mass of earth (M), its mean density ( rho ), its radius (R) and gravitational constant (G), thus the formula for escape veloctiy is

physicsGeneral
General
physics

The escape velocity of a particle of mass m varies as

The escape velocity of a particle of mass m varies as

physicsGeneral
General
physics

The escape velocity of a projectile from the earth is approximately

The escape velocity of a projectile from the earth is approximately

physicsGeneral
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General
physics

If g is the acceleration due to gravity at the earth's surface and r is the radius of the earth, the escape velocity for the body to escape out of earth's gravitational field is……..

If g is the acceleration due to gravity at the earth's surface and r is the radius of the earth, the escape velocity for the body to escape out of earth's gravitational field is……..

physicsGeneral
General
physics

The escape velocity from the earth is about  11kms-1. The escape velocity from a planet having twice the radius and the same mean density as the earth is ... kms -1

The escape velocity from the earth is about  11kms-1. The escape velocity from a planet having twice the radius and the same mean density as the earth is ... kms -1

physicsGeneral
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chemistry-

When zeolite (Hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with

When zeolite (Hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with

chemistry-General
parallel
General
chemistry-

Temporary hardness of water can be removed by

Temporary hardness of water can be removed by

chemistry-General
General
chemistry-

Which of the following pair of ions makes the water hard

Which of the following pair of ions makes the water hard

chemistry-General
General
chemistry-

Heavy water is compound of

Heavy water is compound of

chemistry-General
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