Test Details

Thermodynamics

Dec 25, 10:00 AM

30 minutes

Dec 25, 10:30 AM

40.0 marks

MCQ

20 questions

MOHD SALIM

M.Sc. (Botany) Plant Pathology and Nematology ( AMU) Aligarh B.Sc. (Botany&Chemistry) VBSPU, Jaunpur PGT-Biology Lecturer (CPS) Azamgarh

Class Details

Chemistry

Class-11 (Math/Bio) M

Chemistry

In this classroom, I will cover the entire syllabus of chemistry as prescribed by CBSE for class-11. There would be weekly doubt clearing sessions along with biweekly assignments, periodic test and many more.

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Question Text

Question 1 :
A reaction that occurs only when heat is added is best described as:

Question 2 :
When 1 mol gas is heated at constant volume temp. is raised from 298 to 308 K. Heat supplied to the gas is 500 J. Then which statement is correct?

Question 4 :
$C_v$ for helium gas $(He)$ is $(in J \ mol^{-1} \ K^{-1})$

Question 7 :
Assertion: The presence of reactants in the closed vessel made of conducting material is an example of a closed system. Reason: In a closed system, there is no exchange of matter but exchange of energy is possible between the system and the surroundings.

Question 8 :
If there were no atmosphere, the average temperature on earth surface would be

Question 9 :
Temperatures of two hot bodies $B_{1}$ and $B_{2}$ are $100^{\circ}C$ and $80^{\circ}C$ respectively. The temperature of surrounding is $40^{\circ}C$. At $t = 0$, the ratio of rates of cooling of the two bodies (liquid) $R_{1} : R_{2}$ will be:

Question 13 :
A gas expands against a constant external pressure of $2.00\ atm$, increasing its volume by $3.40\ L$. Simultaneously, the system absorbs $400\ J$ of heat from its surroundings. What is $\Delta E$, in joules, for this gas?

Question 14 :
For which of the following change $\triangle H = \triangle E?$

Question 15 :
Two systems are in ____________ when their chemical potentials are the same.

Question 16 :
The internal energy change when a system goes from state $A$ to $B$ is $40 \ kJmole^{-1}$. If the system goes from $A$ to $B$ by a reversible path and returns to state $A$ by an irreversible path, what would be the net change in internal energy?

Question 17 :
Calculate the amount of ice that will separate out on cooling a solution containing $50$ g of ethylene glycol in $200$g of water to $-9.3°C$.Molal depression constant for water is $1.86$ K kg/mol

Question 18 :
Two closed vessel $A$ and $B$ of equal volume of $8.21L$ are connected by a narrow tube of negligible volume with open valve. The left hand side container id found to contain $3\ mole \, CO_2$ and $2\ mole$ of $He$ at $400K$. What is the partial pressure of $He$ in vessel $B$ at $500K$?

Question 19 :
Assertion (A): A system is said to be closed if it can exchange energy but not matter. Reason (R): Coffee in a stoppered thermos flask is an example of closed system.

Question 20 :
"Heat cannot by itself flow from a body at lower temperature to a body at higher temperature" is a statement of the consequence of

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