Chemistry-

#### For which one of the following equations is D H reaction equal to DH° for the product-

Chemistry-General

- CH4(g)+ 2Cl2(g) →CH2Cl2(l)+ 2HCl(g)
- N
_{2}(g)+O_{3}(g)→N_{2}O_{3}(g)
- Xe(g)+2F2(g)→XeF4(g)
- 2CO(g)+O2(g)→ 2CO2(g)

_{2}(g)+O_{3}(g)→N_{2}O_{3}(g)#### Answer:The correct answer is: Xe(g)+2F2(g)→XeF4(g)

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chemistry-

#### The absolute enthalpy of neutral is ation of the reaction: MgO(s)+2HCl(aq)3/4→MgCl2(aq)+H2O(l) will be-

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#### When a die is rolled twice, if the event of getting an even number is denoted by a success and the number of successes as a random variable, then distribution and mean of the variate are

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#### For there action C2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l) Which one istrue -

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#### 2Zn+O2 3/2 →2ZnODG°=–616J 2Zn+S2→2ZnSDG°=–293J S2+2O2 3/4 →2SO2DG°=–408J DG°forthefollowingreactionis-2ZnS+3O2 3/4 →2ZnO+2SO

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#### Change in entropy is negative for–

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#### GivenenthalpyofformationofCO2(g)andCaO(s) are–94.0KJand–152KJrespectivelyandthe enthalpyofthereaction-CaCO3(s) →CaO(s)+CO2(g) is42KJ.The enthalpyofformationofCaCO3(s)

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maths-

#### Assertion (A) : The number of ways of arranging 6 boys and 5 girls alternately at circular table is Reason (R) : To arrange boys and girls alternately at a circular table, they should be equal in number.

Reason is correct explanation of the statement

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Reason is correct explanation of the statement

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#### Assertion(A): The number of quadratic expressions with the coefficients drawn from the set {0,1,2,3} is only 48 but not 64.

Reason(R): The coefficient inthe quadratic expression can not be ’

Reason is correct explanation of Assertion

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Reason is correct explanation of Assertion

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#### Assertion: There are three doors to a room The number of ways in which a student can enter the room and leave it by a different door is 6.

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maths-General

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#### Assertion: The sum of all4 digited numbers that can be formed using the digits 1,2,4,5,6 without repetition is 479952

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#### Assertion: The sum of all4 digited numbers that can be formed using the digits 1,2,4,5,6 without repetition is 479952

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