Recent questions in Chemistry

0 votes

1 answer

A solution containing \(10 \mathrm{~g}\) per \(\mathrm{dm}^{3}\) of urea (molecular mass \(=60 \mathrm{~g} \mathrm{~mol}^{-1}\) ) is isotonic with a \(5 \%\) solution of a nonvolatile solute is

asked Dec 20, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

1 answer

The volume strength of 1.5 N H2O2 solution is

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

1 answer

Define one coulomb.

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

The dissociation constant for acetic acid and \(\mathrm{HCN}\) at \(25^{\circ} \mathrm{C}\) are \(1.5 \times 10^{-5}\) and \(4.5 \times 10^{-10}\) respectively. the equilibrium constant for reaction \(\mathrm{CN}^{-}+\mathrm{CH}_{3}\) \(\mathrm{COOH} \leftrightharpoons \mathrm{HCN}+\mathrm{CH}_{3} \mathrm{COO}^{-}\)

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

The Gibb's energy for the decomposition of \(\mathrm{Al}_{2} \mathrm{O}_{3}\) at \(500^{\circ} \mathrm{C}\) is as follows: $$ 2 / 3 \mathrm{Al}_{2} \mathrm{O}_{3} \longrightarrow 4 / 3 \mathrm{Al}+\mathrm{O}_{2}, \Delta_{r} G=+966 \mathrm{~kJ} \mathrm{~mol}^{-1} $$ The potential difference needed for electrolytic reduction of \(\mathrm{Al}_{2} \mathrm{O}_{3}\) at \(500^{\circ} \mathrm{C}\) is at least

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

1 answer

Equal masses of \(\mathrm{H}_{2}, \mathrm{O}_{2}\) and methane have been taken in a container of volume \(\mathrm{V}\) at temperature \(27^{\circ} \mathrm{C}\) in identical conditions. The ratio of the volumes of gases \(\mathrm{H}_{2}: \mathrm{O}_{2}\) : methane would be

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

Derive an expression for Nernst equation

asked Dec 19, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

2 answers

A battery of emf 10 V and internal resistance 3 ohm is connected to a resistor. If the current in the circuit 0.5 A, find : (i) the resistance of the resistor; (ii) the terminal voltage of the battery.

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

1 answer

What happens when:

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

Compare any three Micro minerals on the basis of their sources and benefits.

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

1 answer

Find the oxidation state of oxygen in OF2 .

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

1 answer

Which of the following contains maximum number of molecules?

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

The empirical formula of a compound is \(\mathrm{CH}_{2} \mathrm{O}\). Its molecular weight is 180 . The molecular formula of the compound is

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

The correct order of bond dissociation enthalpy of halogens is:

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

11 answers

Polythene and PVC are examples of

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

Does methyne exist? If yes give its structure and if no then explain why?

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

Calculate the \(E^{\circ}\) cell for the following equation. Use these standard potentials.

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

2 answers

1. Why does an aqueous solution of acid conduct electricity? 2. How does the concentration of hydrogen ions [H3O+] change when the solution of an acid is diluted with water? 3. Which has higher pH? A concentrated or dilute solution of HCl? 4. What would you observe on adding dil HCl acid to (a) Sodium bicarbonate placed in a test tube? (b) Zinc metal in a test tube.

asked Dec 18, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

3 answers

Why is ICl more reactive than I2 ?

asked Dec 17, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

0 votes

23 answers

Iodoform test is not given by

asked Dec 17, 2021 in Some basic concepts in chemistry by kritika (90.1k points)

Page:

« prev
1
...
6
7
8
9
10
11
12
...
14
next »

Recent questions in Chemistry

...