Recent questions tagged medium

A red solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating red solid in a test tube produces violet coloured fumes and droplets of metal appear on the cooler parts of test tube. The red solid is

asked Feb 1, 2014 by mosymeow_1

1 answer

Which of the following metal sulphides has maximum solubility in water?

asked Feb 1, 2014 by mosymeow_1

1 answer

When chlorine water is added to an aqueous solution of potassium halide in the presence of chloroform, a violet colour is obtained. On adding more of chlorine water, the violet colour disappears, and a colourless solution is obtained. This test confirms the presence of the following in aqueous solution.

asked Feb 1, 2014 by mosymeow_1

1 answer

Iodine reacts with $Na_2S_2O_3$ (aq) to give products which are

asked Feb 1, 2014 by mosymeow_1

1 answer

Lead has been placed in the group I and II because

asked Feb 1, 2014 by mosymeow_1

1 answer

Suspended impurities from a colloidal solution of gum in water can be removed by

asked Feb 1, 2014 by mosymeow_1

1 answer

Which of the following can be enthalpy of neutralisation of a weak acid and a strong base?

asked Feb 1, 2014 by mosymeow_1

1 answer

If enthalpy of neutralisation of $dil\; HCl$ and $NaOH\; (aq)$ is $x$ then enthalpy of neutralisation of dil HI and $Ba(OH)_2\; (aq)$ is

asked Feb 1, 2014 by mosymeow_1

1 answer

Which of the following precipitates $K^+$ from its solution?

asked Feb 1, 2014 by mosymeow_1

1 answer

Which of the following is insoluble in dil. $HNO_3$ but soluble in aqua regia?

asked Feb 1, 2014 by mosymeow_1

1 answer

When $H_2S$ is passed through an ammoniacal salt solution X, a white ppt. is obtained. Then X can be a

asked Feb 1, 2014 by mosymeow_1

1 answer

Distinguishing reagent between silver and lead salts

asked Feb 1, 2014 by mosymeow_1

1 answer

$H_2S$ in the presence of HCl precipitates group II but not group IV because

asked Feb 1, 2014 by mosymeow_1

1 answer

Concentrated nitric acid is added before proceeding to test for group III members. This is to

asked Feb 1, 2014 by mosymeow_1

1 answer

Mg is not precipitated in group V because

asked Feb 1, 2014 by mosymeow_1

1 answer

The ion that cannot be precipitated by both HCl and $H_2S$ is

asked Feb 1, 2014 by mosymeow_1

1 answer

Which of the following solution gives precipitate with $Pb(NO_3)_2$ but not with $Ba(NO_3)_2$ ?

asked Feb 1, 2014 by mosymeow_1

1 answer

An aqueous solution of salt gives white precipitate with $AgNO_3$ solution as well as with dil $H_2SO_4$. It may be

asked Feb 1, 2014 by mosymeow_1

1 answer

In a mixture having nitrite and nitrate can be destroyed by heating with

asked Feb 1, 2014 by mosymeow_1

1 answer

For the test of halides, the soda extract is acidified with

asked Feb 1, 2014 by mosymeow_1

1 answer

Formation of purple colour on the addition of sodium nitroprusside to sodium carbonate extract indicates the presence of

asked Feb 1, 2014 by mosymeow_1

2 answers

A salt solution is acidified with dil. $HCl$ and $BaCl_2$ solution is added. A white ppt. is formed. The salt contains

asked Feb 1, 2014 by mosymeow_1

1 answer

Which one of the following cation will give a blue coloured ash when a piece of filter paper dipped in a solution containing its salt and $Co(NO_3)_2$ is burned?

asked Feb 1, 2014 by mosymeow_1

1 answer

$H_2S$ and $SO_2$ can be distinguished by

asked Feb 1, 2014 by mosymeow_1

1 answer

Acidified $K_2Cr_2O_7$ turns green by

asked Feb 1, 2014 by mosymeow_1

1 answer

An inorganic salt when heated evolves a coloured gas which bleaches moist litmus paper. The evolved gas is

asked Feb 1, 2014 by mosymeow_1

1 answer

Heating of oxalic acid with conc. $H_2SO_4$ gives

asked Feb 1, 2014 by mosymeow_1

1 answer

A test tube containing a nitrate and another containing a bromide and $MnO_2$ are treated with conc. $H_2SO_4$. The brown fumes evolved are passed through water. The water will be coloured by

asked Feb 1, 2014 by mosymeow_1

1 answer

When a salt is heated with dil $H_2SO_4$ and $KMnO_4$ solution, the pink colour of $KMnO_4$ is discharged, the mixture contains:

asked Feb 1, 2014 by mosymeow_1

1 answer

When borax is heated in a platinum loop, the transparent bead formed contains

asked Feb 1, 2014 by mosymeow_1

1 answer

The most suitable indicator for the titrations of $Ba(OH)_2$ against HI is

asked Feb 1, 2014 by mosymeow_1

1 answer

If $pK_{in}$ of an indicator is 10.5, the pH transition range for which it is most suitable is

asked Feb 1, 2014 by mosymeow_1

1 answer

The most suitable indicator for the titration of HCOOH against NaOH is

asked Feb 1, 2014 by mosymeow_1

1 answer

Completion of diazotisation can be checked with

asked Feb 1, 2014 by mosymeow_1

1 answer

$C_6H_5OH$ and $C_2H_5OH$ can be distinguished by

asked Feb 1, 2014 by mosymeow_1

1 answer

Which of the following compound will give blood red colour while doing the Lassigne's test for N?

asked Feb 1, 2014 by mosymeow_1

1 answer

Gas-A is kept in the left partition of the container with a temperature of T at pressure 2P. Gas-B is kept in the right part of the container with a temperature of 4T at pressure P. When what is the value of the Pressure P' when the partition is removed?

asked Jan 31, 2014 by balaji

1 answer

Consider the following case. What is the value of P' ?

asked Jan 31, 2014 by balaji

1 answer

A container contains an ideal gas. The wall is hit by "n" molecules / second, each of mass "m" and moving the same velocity "u". The force exerted by the molecules on the wall is?

asked Jan 31, 2014 by balaji

1 answer

An ideal gas kept in vessel has rms spped of 200 m/s. If 10% of the gas leaks out of the vessel, then the rms speed of the remaining molecules is?

asked Jan 31, 2014 by balaji

1 answer

A liquid is boiled and its temperature (T) versus Heat supplied (Q) graph is plotted. Which of the following is the correct graph?

asked Jan 31, 2014 by balaji

1 answer

In a bivariate data $ \Sigma x = 30\: \: \Sigma y = 400 \: \: \Sigma x^2=196 \: \: \Sigma xy = 850 \: \: n=10$ \[\] Find the regression coefficient of $y$ and $x$

asked Jan 31, 2014 by thanvigandhi_1

1 answer

If $x= \cos^{-1} \bigg( \large\frac{1}{\sqrt {1+t^2}}\bigg) $ and $\; y= \sin ^{-1} \bigg( \large\frac{1}{\sqrt {1+t^2}}\bigg) $ then $\large\frac{dy}{dx}$

asked Jan 31, 2014 by meena.p

1 answer

If $x^2+y^2=t-\large\frac{1}{t} ,$$x^4+y^4 =t^2+\large\frac{1}{t^2}$ then $\large\frac{dy}{dx}$

asked Jan 31, 2014 by meena.p

1 answer

Which one of the following has a square planar geometry

asked Jan 31, 2014 by sreemathi.v

1 answer

If $\phi (x) =f(x) g(x),$ where $f'(x) g'(x) =c$ and $ \large\frac {\phi ''}{\phi} =\frac {f''}{f} +\frac{g''}{g}+\frac{Kc}{fg}$ then value of K.

asked Jan 31, 2014 by meena.p

1 answer

How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with $Ca^{2+}$ ion

asked Jan 31, 2014 by sreemathi.v

1 answer

In $Fe(CO)_5$,the $Fe-C$ bond poses

asked Jan 31, 2014 by sreemathi.v

1 answer

The IUPAC name of the complex $[CO(NO_2)(NH_3)_5]Cl_2$ is

asked Jan 31, 2014 by sreemathi.v

1 answer

Which of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour

asked Jan 31, 2014 by sreemathi.v

1 answer

Ask Questions, Get Answers