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$P^H$ of $0.1\;M$ Solution of weak acid is 3. The value of ionisation constant $Ka$ of acid is

asked Nov 16, 2018 by meena.clay6

1 answer

The $p^{Ka}$ of a weak acid $HA$ is $4.80$ The $pK_b$ of a weak base BOH is $4.78$ .The $p^{H}$ of an aqueous solution of the corrosponding salt $BA$ will be

asked Nov 16, 2018 by meena.clay6

1 answer

Species acting both as bronsted acid and a base is

asked Nov 16, 2018 by meena.clay6

1 answer

Ammonium ion is

asked Nov 16, 2018 by meena.clay6

1 answer

Water is a

asked Nov 15, 2018 by meena.clay6

1 answer

For the reaction $2NO_{(2g)} \rightleftharpoons 2NO_{(g)}+O_{2(g)} \qquad K_c=1.8 \times 10^{-6}$ at $184^{\circ} c R=0.0831\;KJ/mol\;K$ When $K_p$ and $K_c$ are compared at $184^{\circ}$ it is found that :

asked Nov 15, 2018 by meena.clay6

1 answer

Three reaction involving $H_2PO_4$ are given below $(i)H_3PO_4+H_2O \rightleftharpoons H_3O^{+}+H_2PO_4^{-} \\ (ii)H_2PO_4+H_2O \rightleftharpoons HPO_{4}^{-2}+H_3^{+}O \\ (iii)H_2PO_4+OH \rightleftharpoons H_3PO_4+O^{2-}$ In which of the above does $H_2PO_4$ act as an acid

asked Nov 15, 2018 by meena.clay6

1 answer

A vessel contains $CO_2$ at $1000\;K$ temperature with pressure $0.5$ atm. Some of $CO_2$ is converted in to CO on addition of graphite . If total pressure at equilibrium is $0.8$ atm the value of $K_p$ is

asked Nov 15, 2018 by meena.clay6

1 answer

The following equilibrium constant are given : $N_2+3H_2 \rightleftharpoons 2NH_3;K_1 \\ N_2+O_2 \rightleftharpoons 2NO;K_2\\H_2+1/2O_2 \rightleftharpoons +H_2OK_3 $ The equilibrium constants for the oxidation of $NH_3$ by oxygen to given NO is :

asked Nov 14, 2018 by meena.clay6

1 answer

Calculate the pH of the solution when $0.1\; M\; CH_3 COOH (50 ml)$ and $0.1\; M\; NaOH (50 ml)$ are mixed, $[Ka (CH_3COOH)=10^{-5}]$

asked Nov 13, 2018 by meena.clay6

1 answer

Equilibrium constant changes with

asked Nov 13, 2018 by meena.clay6

1 answer

Equilibriam are those in which the reactants and products are present in more than phases:

asked Nov 13, 2018 by meena.clay6

1 answer

Two congruent circles overlap on a plane. The radius of both circles is 2. The region in which they overlap has an area of $\pi$. What is the total area of the two overlapping circles ?

asked Nov 12, 2018 by priyanka.c

1 answer

The diameter of a circle whose circumference is area $7 \pi$ is

asked Nov 12, 2018 by priyanka.c

1 answer

Area of the circle is $22 \; \pi$, what can be the closest value to the area of the square ? <BR>

asked Nov 12, 2018 by priyanka.c

1 answer

If the area of the sector is $3 \pi \; sq. feet$. Whose central angle is $30^{\circ}$. What is the perimeter of the sector ?

asked Nov 12, 2018 by priyanka.c

1 answer

The diagram shows a plot of land. The cost of summer up keep is $ \$ 3.00$ per square foot. What is the total up keep for the summer ? <br> <br> BC = CD = DE <br> AF = 30 feet

asked Nov 12, 2018 by priyanka.c

1 answer

Two chords of a circle $\overline{PQ}$ and $\overline{RS}$ intersect at a point $O$. $\overline{PQ}$ is thrice as long as $\overline{RS}$. If $QO = 20$ and $RO = 10$, find the length of $\overline{PO}$.

asked Nov 12, 2018 by priyanka.c

1 answer

If, in the reaction $N_2O_4 \equiv 2NO_2$, x is that part of $N_2O_4$ which dissociates, then the number of molecules at equilibrium will be

asked Nov 1, 2018 by meena.p

1 answer

Amines behave as

asked Nov 1, 2018 by meena.p

1 answer

What is the best description of the change that occurs when $Na_2O(s)$ is dissolved in water?

asked Nov 1, 2018 by meena.p

1 answer

The equilibrium constant for the reaction $2SO_2(g)+O_2(g) \to 2SO_3(g)$ would be :

asked Nov 1, 2018 by meena.p

1 answer

Equal amounts of reactants are poured into a suitable container. Given sufficient time, the reactants may be converted almost entirely to products if:

asked Oct 31, 2018 by meena.p

1 answer

When pressure is applied to the given equilibrium ice water which of the following will happen

asked Oct 31, 2018 by meena.p

1 answer

The solution having zero PH will be

asked Oct 31, 2018 by meena.p

1 answer

Equilibrium solution of the following were prepared in water separately . Which one of the solutions will record the highest $P^{H}$?

asked Oct 30, 2018 by meena.p

1 answer

$P^{H}$ of a soda water bottle is :

asked Oct 29, 2018 by meena.p

1 answer

Equal volumes of three basic solutions of 11,12 and 13 are mixed in a vesel. What will be the concentration in the mixture ?

asked Oct 29, 2018 by meena.p

1 answer

Equal volumes of three basic solutions of 11,12 and 13 are mixed in a vesel. What will be the concentration in the mixture ?

asked Oct 29, 2018 by meena.p

0 answers

Which one of the following has the lowest $P^H$ value ?

asked Oct 29, 2018 by meena.p

1 answer

$PH$ of a solution containing 50 mg of sodium hydroxide in $10\;dm^3$ of the solution is

asked Oct 26, 2018 by meena.p

1 answer

$K_{sp}$ of $AglO_3$ is $1 \times 10^{4}$ at a given temperature what is the mass of $AglO_3$ in 100 ml of its saturated solution ?

asked Oct 26, 2018 by meena.p

1 answer

The aqueous solution of $HCOONa,C_6H_5NH_3Cl$and $KCN$ are respectively

asked Oct 26, 2018 by meena.p

1 answer

Equilibrium solution of the following were prepared in water separately . Which one of the solutions will record the highest $P^{H}$?

asked Oct 26, 2018 by meena.p

1 answer

Number of $H^{+ ions}$ present in 500 ml of lemon juice of $P^{H}=3$ is

asked Oct 26, 2018 by meena.p

1 answer

The dissociation constant of a substituted benzoic acid at $25C$ is $1.0 \times 10^{-4}$. The $p^{H}$ of $0.01\;M$ solution its sodium salt is

asked Oct 26, 2018 by meena.p

1 answer

The ionization constant of $NH_4OH$ is $1.77 \times 10^{-5}$ at $298\;K$ . Hydrolysis constant of it is

asked Oct 26, 2018 by meena.p

1 answer

If $Ca(OH)_2$ is dissolved a solution of $NaOH$ its solubility , compared with that in pure water , is

asked Oct 25, 2018 by meena.p

1 answer

A change in which of these conditions will change the K of an equilibrium given as a starting point ?

asked Oct 25, 2018 by meena.p

1 answer

The PH of a solution that has a hydrogen ion concentration of $1 \times 10^{-4}\;mole/liter$ is

asked Oct 25, 2018 by meena.p

1 answer

If the $k_{sp}$ of radium sulfate , $RaSO_4$ is $4 \times 10^{-11}$, Calculate the solubility of the compound in pure water. Let x = moles of $RaSO_4$ that dissolve per liter of water. Then , in the saturated solution ,

asked Oct 25, 2018 by meena.p

1 answer

Silicon dioxide, made up of elements silicon and oxygen, contains 46.7% by mass of silicon. With what mass of oxygen will 10 g of silicon combine?

asked Oct 25, 2018 by meena.p

1 answer

In the Haber process for making ammonia , an increase in pressure favors

asked Oct 25, 2018 by meena.p

1 answer

A small value for K , the equilibrium constant , indicates that

asked Oct 25, 2018 by meena.p

1 answer

The PH of a solution that has a hydroxide ion concentration of $1 \times 10^{-4}$ moles /liter is

asked Oct 25, 2018 by meena.p

1 answer

The concentration in an expression of the equilibrium constant are given in

asked Oct 24, 2018 by meena.p

1 answer

For the reaction $A+B =C+D$ , the equilibrium can be expressed as :

asked Oct 24, 2018 by meena.p

1 answer

<br> $AB$ is a chord in a circle whose centre is $'O'$. The radius of the circle is 8 cm. The distance of the chord from its centre is 6 cm. Then the length of the chord is

asked Oct 16, 2018 by priyanka.c

1 answer

The circumference of a circle whose radius is $\pi$ is

asked Oct 16, 2018 by priyanka.c

1 answer

In the circle given below with centre o, the angle A is $\frac{\pi}{4}$, what is the length of arc A ? <br>

asked Oct 16, 2018 by priyanka.c

1 answer

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