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Which of the following is not formed when $H_{2}S$ reacts with acidic $K_{2}C{r}_2{O}_7$ solutions?

Hardness of water is expressed in terms of parts per million of calcium carbonate. A sample of water contains $0.02\%$ of calcium carbonate, hardness of the sample is

Thermal decomposition of gaseous $X_2$ to gaseous X at 298 K takes place according to the following equation:

$X_2\left(g\right)\rightleftharpoons 2X\left(g\right)$

The standard reaction Gibbs energy, $\Delta G^o,$ of this reaction is positive. At the start of the reaction, there is one mole of $X_2$ and no X. As the reaction proceeds, the number of moles of X formed is given by $\beta ,$ Thus, ${\beta }_{equilibrium}$ is the number of moles of X formed at equilibrium. The reaction is carried out at a constant total pressure of 2 bar. Consider the gases to behave ideally.

(Given: R = 0.083 L bar $K^{-1}mo{l}^{-1}$)



The equilibrium constant $K_p$ for this reaction at 298 K, in terms of ${\beta }_{equilibrium},$ is

Why is
glass considered a super cooled liquid?

How can you prepare $C{l}_2$ from HCl and HCl from $C{l}_2$ ? Write equation only.

The order of basic strength among the following amines in benzene will be

Which of the following is the enantiometer of the structure?

The ratio of mass percent of C and H of an organic compound $\left(C_X{H}_Y{O}_Z\right)$ is 6 : 1. If one molecule of the above compound $\left(C_X{H}_Y{O}_Z\right)$ contains half as much oxygen as required to burn one molecule of compound $C_X{H}_Y$ completely to $C{O}_2$ and $H_{2}O$. The empirical formula of compound $C_X{H}_Y{O}_Z$ is

Compounds having the same constitution and sequence of covalent bonds but differ in relative position of their atoms or groups in space are called:

Depression in freezing point is maximum for:

During electrosmosis of Fe(OH)3 Sol

A.)Sol particles move towards anode

B.)Sol particles move towards cathode

C.)Dispersion medium moves towards anode

D.) Dispersion phase move towards cathode

Which
of the followings are Lewis acids? H₂O,
BF₃,
H⁺,
and

How many grams of sodium carbonate is obtained on heating $8.4\text{g}$ of $NaHC{O}_3\left(s\right)$?

$NaH$ reacts with water to give:

Which of the following represents van der Waals gas below the critical temperature?

When acetone is treated with sodium bisulphite, the compound formed is:

The following sequence of reactions

the end product (C) is:

In the nitration of benzene using a mixture of conc. H₂SO₄ and conc. HNO₃ the Species which initiates the reaction is_______________

The reagent that gives an orange precipitate with acetaldehyde is:

Which among the following elements will have a positive electron gain enthalpy?

Conductivity of saturated solution of silver phosphate is $9\times {10}^{-6}$ $S{m}^{-1}$ and equivalent conductivity $1.5\times {10}^{-4}$ $S{m}^2$/equivalent. Find $K_{sp}$ of $A{g}_{3}P{O}_4$.

Among the following which is the condition favourable for the formation of $C{H}_{3}OH$ from $CO$ and $H_2$ ?

Drugs that bind to the receptor site and inhibit its natural function are called:

Why does white ZnO (s) becomes yellow upon heating ?

When 2-chloro-2-methylpentane is heated with $C{N}^{-}$, the majority product is:

Which of the following compound is used in the manufacturing of soap?

Which
of the followings are Lewis acids? H₂O,
BF₃,
H⁺,
and

On reaction with $HN{O}_2$ which of the following amines yield a yellow oily product?

The dipolemoment of H - Br molecule is $2.6\times {10}^{-30}$ coulomb.metre. Its bond length is $1.3\mathring{A}$ Then the percentage ionic character of H - Br bond is

Which of the following arrangement cannot be possible?