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Recent questions in Chemistry

Questions >> SAT >> Chemistry

Chemistry

Gases and gas laws

Oxidation & Reduction

Stoichiometry and the mole concept

Atomic Structure

Liquids, solids and phase change

Chemical reactions and thermochemistry

chemical formulae

chemical equilibrium

Acids and Bases

The function of quick lime in soda lime mixture is to

asked Dec 12, 2018 by meena.clay6

1 answer

Methyl orange is

asked Dec 12, 2018 by meena.clay6

1 answer

Which one of the following is acidic?

asked Dec 12, 2018 by meena.clay6

1 answer

At the boiling point of a liquid its ________ becomes equal to the atmospheric pressure.

asked Dec 11, 2018 by meena.clay6

1 answer

The pH of pure water at $80^\circ C$ will be

asked Dec 11, 2018 by meena.clay6

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 Dec 11, 2018 by meena.clay6

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 Dec 11, 2018 by meena.clay6

1 answer

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

asked Dec 11, 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 Dec 11, 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 30, 2018 by meena.clay6

0 answers

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

asked Nov 30, 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 30, 2018 by meena.clay6

1 answer

What can affect the magnitude of equilibrium constant Kp of a reversible gaseous reaction

asked Nov 26, 2018 by meena.clay6

1 answer

The relation between $K_c$ and $K_p$ is

asked Nov 26, 2018 by meena.clay6

1 answer

A basic Buffer solution can be prepared by mixing

asked Nov 26, 2018 by meena.clay6

1 answer

In an exothermic reversible reaction increase in temp shifts the equilibrium to

asked Nov 26, 2018 by meena.clay6

1 answer

A large value of Kc means that at equilibrium

asked Nov 26, 2018 by meena.clay6

1 answer

A reaction is reversible because

asked Nov 26, 2018 by meena.clay6

1 answer

Which of the following weakest ?

asked Nov 26, 2018 by meena.clay6

1 answer

$EDTA$ is a/an

asked Nov 26, 2018 by meena.clay6

1 answer

With increase in temperature , ionic product of water .

asked Nov 26, 2018 by meena.clay6

1 answer

One of the following is a bronsted acid hot not a bronsted base

asked Nov 26, 2018 by meena.clay6

1 answer

Conjugate base of hydrazonic acid is :

asked Nov 23, 2018 by meena.clay6

1 answer

Which of the following is a base according to lowry- bronsted concept?

asked Nov 23, 2018 by meena.clay6

1 answer

The solubility product of $AgCl$ is $4 \times 10^{-18}$ at $298\;k$ . The solublity of AgCl in $0.04\;MCaCl_2$ will be

asked Nov 23, 2018 by meena.clay6

1 answer

A certain buffer solution contains equal concentration of $X^{-}$ and $HX.K_4$ for $HX$ is $10^{-4}$. The $p^{H}$ of buffer is

asked Nov 22, 2018 by meena.clay6

1 answer

$P^{H}$ of $10^{-3}\;M$ solution of HCL in water is

asked Nov 22, 2018 by meena.clay6

1 answer

Equal volumes of two solution of $p^H3$ and 4 are mixed The $p^{H}$ of the resulting solution will be

asked Nov 22, 2018 by meena.clay6

1 answer

Process by which ammonia is produced by reaction of nitrogen with hydrogen at 200 atm pressure and in presence of a catalyst is called

asked Nov 19, 2018 by meena.clay6

1 answer

Reactions in which reactants react to form products and simultaneously products reverse back in to reactants are called

asked Nov 19, 2018 by meena.clay6

1 answer

Rate at which a substance reacts is directly proportional to its

asked Nov 19, 2018 by meena.clay6

1 answer

Which of following is used as catalyst in contact process?

asked Nov 19, 2018 by meena.clay6

1 answer

State at which forward and reverse reactions occur at same rate is

asked Nov 19, 2018 by meena.clay6

1 answer

Equilibrium constant can be used to determine equilibrium concentration of equilibrium mixture knowing the

asked Nov 19, 2018 by meena.clay6

1 answer

In reverse reaction $SO_3$ decomposes in to

asked Nov 19, 2018 by meena.clay6

1 answer

Due to high concentration of reactants, rate of forward reaction is

asked Nov 16, 2018 by meena.clay6

1 answer

Rate at which reaction proceeds is directly proportional to

asked Nov 16, 2018 by meena.clay6

1 answer

For the following reaction in gaseous phase $CO+\large\frac{1}{2}$$O_2 \rightleftharpoons CO_2$ and $\large\frac{K_c}{K_p}$ is

asked Nov 16, 2018 by meena.clay6

1 answer

$P^H$ 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

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