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A thermodynamic system is taken through the cycle $ABCD$ as shown in figure. If $O_2$ gas is taken through $ABCD$, then net heat absorbed is $H_1$. Now if Helium gas is taken through $ABCD$, net heat absorbed is $H_2$. Find $\frac{H_1}{H_2}$.

Solubility product of silver bromide is $5.0\times {10}^{-13}$. How much of potassium bromide $\left(120{\text{g mol}}^{-1}\right)$ has to be added to $1\text{L}$ of $0.05M$ solution of silver nitrate to start the precipitation of $AgBr$ ?

The smallest ketone and its next homologue are reacted with NH2OH to form oxime. What will be the result?

Explain how does the -OH group attached to a carbon of benzene ring activate it towards electrophilic substitution?

What is the value of the change in internal energy at 1 atm in the following process?

$H_{2}O(l,323K)\to H_{2}O(g,423K)$

Given : $C_{v,m}(H_{2}O,1)=75.0J{K}^{-1};C_{p,m}(H_{2}O,g)=33.314J{K}^{-1}mo{l}^{-1};\Delta H_{vap}\text{at}373K=40.7kJ/mol$

The compounds which gives the most stable carbonium ion on dehydration is:

If the solubility product $K_{sp}$ of a sparingly soluble salt $M{X}_2$ at ${25}^{\circ }C$ is

$1.0\times {10}^{-11}$, the solubility of the salt in mole/litre at this temperature will

be

Phenyl cyanide on reduction with $Na/C_2{H}_{5}OH$ yields:

Which one acts as both oxidising as well as reducing agent?

When it is gently warmed, Sodium thiosulphate pentahydrate loses its water of crystallization. $N{a}_2{S}_2{O}_3.5H_{2}O$ is commonly called __.

Apart
from tetrahedral geometry, another possible geometry for CH₄
is square planar with the four H atoms at the corners of the square
and the C atom at its centre. Explain why CH₄
is not square planar?

In the reaction with HCl, an alkene reacts in accordance with the markovnikov's rule, to give a product 1-chloro-1-methylcyclohexane. The possible reaction alkene is :

Which of the following can be termed as oxyfluorides of Xenon?

What is meant by the following terms?
Give an example of the reaction in each case.

(i) Cyanohydrin
(ii) Acetal

(iii) Semicarbazone (iv) Aldol

(v) Hemiacetal (vi) Oxime

(vii)
Ketal (vii) Imine

(ix)
2,4-DNP-derivative (x)
Schiff’s base

Which of the following is major product of following reaction?

CH₃CH₂CH = CH₂ + HI

Draw the
structures of major monohalo products in each of the following
reactions:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

Compare the relative stabilities of following resonating structures:

The minimum weight in grams of methyl iodide required for preparing one mole of ethane by wutrz reaction.

Density of a unit cell is equal to mass of unit cell divided by

Which of the following is/are correct?

10 g of $C_2{H}_6$ is filled in a bulb having 1 litre capacity which can withstand a maximum pressure of 10 atm. At what temperature will the pressure of gas reach the bursting limit?

$Al\&Ga$ have nearly the same constant radii because of