Explore topic-wise InterviewSolutions in .

If copper is kept open in the air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of

In the fountain experiment, what is the colour change observed when colourless phenolphthalein solution is added to a flask containing ammonia?

Which of the following metal cannot be oxidized by $N{O}_3^{-}$ in aqueous solution?



For the reduction of $N{O}_3^{-}$ ion in an aqueous solution, $E^0$ is $+0.96\text{V}$.



$E^0$ for metal ions are given below.

$V^{2+}\left(aq\right)+2e{}^{-}\to V\left(s\right);E^0=-1.19V$

$F{e}^{3+}\left(aq\right)+3e{}^{-}\to Fe\left(s\right);E^0=-0.04V$

$A{u}^{3+}\left(aq\right)+3e{}^{-}\to Au\left(s\right);E^0=+1.40V$

$H{g}^{2+}\left(aq\right)+2e{}^{-}\to Hg\left(s\right);E^0=+0.86V$

What is name of functional group -CHO?

Ethane, Ethene, Ethanoic acid, Ethyne, Ethanol

From the above, name
(a) The compound with –OH as the part of its structure,
(b) The compound with –COOH as the part of its structure.
(c) Homologue of homologous series with general formula $C_n{H}_{2n}$.

Identify the impure metal electrode in the given figure for electrolytic refining.

Bleaching powder is obtained, when slaked lime reacts with ______.

A living system has

How many years would it take to spend Avogadro's number of rupees at the rate of 1 million rupees per second?

A hydrocarbon contains 4.8 g of carbon per gram of hydrogen.
Calculate:
(a) the gram atom of each,
(b) find the empirical formula,
(c) find molecular formula, if its vapour density is 29.

What does "a hydrocarbon form of life" mean?

Define saturated, unsaturated and supersaturated solution with examples.

A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)

NH₄NO₃ $\stackrel{}{\to }$ N₂O + 2H₂O

(i) What volume of dinitrogen oxide is produced at the same time as 8.96 litres of steam?

(ii) What mass of ammonium nitrate should be heated to produce 8.96 litres of steam?

(Relative molecular mass of ammonium nitrate is 80.)

(iii) Determine the percentage of oxygen in the ammonium nitrate. (O = 16)

Picric acid is:

Which of the following are effects of Anaemia?

Match the following:

Ionic bond is present in which of the following species:

(c) What is the difference between the chemical nature of an aqueous solution of hydrogen chloride and an aqueous solution of ammonia?

10g of a metal carbonate on heating gives 5.6 g of its oxide. The equivalent mass of the metal is ?

combustion reaction produce carbon dioxide and water so

Is magnesium + oxygen -------> magnesium oxide

a combustion reaction if yes then why heat , water and co2 didn't produce