Viraf Dalal Chemistry Class 9 Solutions. We covered all the Viraf Dalal Chemistry Class 9 Solutions in this post for free so that you can practice well for the exam.
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Viraf Dalal Chemistry Class 9 Objective Solutions for Students
The standard heat of combustion of carbon, hydrogen, and CH4 are -349, -241.8, and -906.7 kJ respectively. The std. the heat of formation of CH4 is
(A) 174.1 kJ
(B) 274.1 kJ
(C) 374.1 kJ
(D) 74.1 kJ
Option d – 74.1 kJ
40-joule heat is supplied to the system and work done by a system is 8 joule. Increase in internal energy of the system
(A) 25 J
(B) 30 J
(C) 32 J
(D) 28 J
Option c – 32 J
In the isochoric process, the increase in internal energy is equal to
(A) Heat absorbed
(B) Heat evolved
(C) Work done
(D) Heat absorbed and work done
Option a – Heat absorbed
A system in which there is no exchange of matter, work, or energy from the surrounding is
(A) Closed
(B) Isolated
(C) Adiabatic
(D) Isothermal
Option b – Isolated
An adiabatic process occurs in
(A) Open system
(B) Closed system
(C) Isolated system
(D) In all system
Option c – Isolated system
In the isothermal expansion of a gas
(A) Internal energy increases
(B) Enthalpy decreases
(C) Enthalpy remains unaffected
(D) Enthalpy reduced to zero
Option c – Enthalpy remains unaffected
According to Hess’s law, the heat of reaction. depends upon
(A) the Initial state of reactants
(B) the Initial and final state of reactants
(C) the Intermediate path of the reaction
(D) the End point of conditions of the reactant
Option b – the Initial and final state of reactants
Intensive properties among the following are
(A) Specific heat, and temperature
(B) Entropy, density
(C) Enthalpy, mole fraction
(D) Heat, temperature
Option a – Specific heat, and temperature
Which of the following is not a state function? (i) q + W (ii) q (iii) W (iv) HTS
(A) (i), (ii), (iii)
(B) (ii) and (iii)
(C) (i), (iv)
(D) (ii), (iii), (iv)
Option b – (ii) and (iii)
We covered all the viraf dalal chemistry class 9 solutions above in this post for free so that you can practice well for the exam.
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