J Chemistry 24

In the conductance of aqueous \( \mathrm{CuSO}_{4} \) solution, the current carriers are the

What is formed when metal reacts with acid to liberate gas?

When a few drops of Millon reagents is added to egg-white solution in a test tube, the white precipitate changes to

The compound of Copper used as a fungicide is

Aqueous solution of sodium hydroxide can be used to test for the presence of:
I. \( \text{Ca}^{2+} \),
II. \( \text{Zn}^{2+} \),
III. \( \text{Cu}^{2+} \)

An oxide of nitrogen that can rekindle a glowing splint is

The combustion of candle under limited supply of air forms

What would be the order of the electrolytic cell in an industry intending the production of silver plated spoons?

A liquid hydrocarbon obtained from fractional distillation of coal tar that is used in the pharmaceutical industry is

The chemical formula for potassiumhexacyanoferrate(II) is

One of the following is not a water pollutant?

What method is suitable for the separation of gases present in air?

\( \text{H}_{2}\text{S}_{(g)} + \text{Cl}_{2(g)} \;\rightarrow\; 2\text{HCl}_{(g)} + \text{S}_{(s)} \)

What is the change in oxidation state of sulphur from reactant to product?

Heat of solution involves two steps that is accompanied by heat change. The energies involved in this steps are

In the graph above, y represents

When Sulphur(IV)oxide is passed into solution of acidified tetraoxomanganate(VII), the colour changes from

The main constituent of water-glass is

How many isomers has the organic compound represented by the formula
\( \text{C}_{3}\text{H}_{8}\text{O} \)?

Determine the half-life of a first order reaction with constant
\( 4.5 \times 10^{-3} \,\text{s}^{-1} \).

Hydrochloric acid is regarded as a strong acid because it

The constituents of Alnico are Aluminium, Nickel and

Hydrochloric acid is not suitable in the preparation of ethanoic acid because it

The IUPAC nomenclature of the complex \( \text{K}_{4}\text{Fe(CN)}_{6} \) is

The shape of the molecule of Carbon(IV) oxide is

In a chemical reaction, surface area of reactants can affect

An example of a physical change is

The term that is not associated with petroleum industry is ?

An example of a compound that is acidic in solution is

The percentage of carbon(IV) oxide in air is

Fats and oils are esters of fatty organic acids combined with a trihydric alkanol commonly referred to as

The scientist that performed the experiment on discharged tubes that led to the discovery of the cathode rays as a sub-atomic particle is

The Van der waals forces of attraction operates between

An example of a physical change is

Which of these is the most preferred separation technique for the isolation of solutes where the purity of the constituent is of utmost importance?

The group VIII elements are the inert gases because they

Boyle's law can be expressed mathematically as

Benzene formed nitrobenzene at temperature of \( 60^\circ \text{C} \) when it reacts
with a mixture of concentrated trioxonitrate(V) acid and concentrated

\( \text{C}_{2}\text{H}_{4(g)} + 3\text{O}_{2(g)} \;\rightarrow\; 2\text{CO}_{2(g)} + 2\text{H}_{2}\text{O}_{(g)} \)

The above equation represents the combustion of ethene.
If \( 10 \,\text{cm}^{3} \) of ethene is burnt in \( 50 \,\text{cm}^{3} \) of oxygen,
what would be the volume of oxygen that would remain at the end of the reaction?

An example of a substance that does not change directly from solid to gas when heated is

In the extraction of Aluminium, the silica impurity is removed by