Explore topic-wise InterviewSolutions in .

(a) Give the $p^H$ value of pure water. Does it change if common salt is added to it?

(b) Classify the following solutions as acids, bases or salts.

Ammonium hydroxide, barium chloride, sodium chloride, sodium hydroxide, $H_{2}S{O}_4$ and $HN{O}_3$.

What is the source of acetic acid ?How do people make

Ethyne, also known as Acetylene, reacts with ozone at room temperature to produce __.

A glass bulb is connected to an open limb manometre. The level of mercury in both limbs of the manometer was same. The bulb was heated to ${57}^{\circ }C$. If the room temperature and the atmospheric pressure were ${27}^{\circ }Cand750mm$.Find the difference of levels in the two limbs now.

Which of the following gas is formed when copper reacts with cold and dilute nitric acid?

The figure given below shows a part of the nitrogen cycle.

Which of the following represents nitrates?

560 ml of carbon monoxide is mixed with 500 ml of oxygen and ignited. The chemical equation for the reaction is as follows:

$2CO+O_2\to 2C{O}_2$

Calculate the volume of oxygen used and carbon dioxide formed in the above reaction.

The volume of the gas is to be found at a pressure of 2500Pa. when the pressure was decreased by 500Pa the gas occupied a volume of 2400 litres. Calculate the initial volume occupied by gas before the change was done while maintaining a constant pressure constant temperature?

Which of the following electronic configuration represents neon?

If 0.5 mole of BaCl₂ is mixed with 0.2 mole of Na₃PO₄ ,then maximum number of moles of Ba₃(PO₄)₂ that can be formed

Which of the following indicators can differentiate between acetic acid and hydrochloric acid?

Pure $O_2$ diffuses through an aperture in 224 s, whereas a mixture of $O_2$ and another gas containing 80% $O_2$ diffuses from the same in 234s under similar conditions of pressure and temperature.What is molecular weight of gas?

Redox reactions play a pivotal role in chemistry and biology. The values of standard redox potential $\left(E_{\ominus }\right)$ of two half cell reactions decided which way the reaction is expected to proceed. A simple example is a Daniell cell in which zinc goes into solution and copper gets deposited. Given below are a set of half cell reactions (acidic medium) along with their $E_{\ominus }$ (V with respect to normal hydrogen electrode) values. Using this data, obtain correct explanations for the following question
$I_2+2e^{-}\to 2I^{\ominus };E^{\ominus }=0.54$
$C{l}_2+2e^{-}\to 2C{l}^{\ominus };E^{\ominus }=1.36$
$M{n}^{3+}+e^{-}\to M{n}^{2+};E^{\ominus }=1.50$
$F{e}^{3+}+e^{-}\to F{e}^{2+};E^{\ominus }=0.77$
$O_2+4H^{⨁}+4e^{-}\to 2H_{2}O;E^{\ominus }=1.23$

While $F{e}^{3+}$ is stable, $M{n}^{3+}$ is not stable in acid solution because

(a) (i) Name the experiment illustrated below. (ii) State the colour of the water that has entered the round-bottomed flask.
(b) What property of hydrogen chloride is demonstrated when it is collected by downward delivery (upward displacement) ?

Arrange the following elements in the increasing order of their metallic character :

Mg, Ca, K, Ga

State whether the following statement is true or false.
The aqueous solution of an ionic compound conducts electricity because there are plenty of free electrons in the solution.

Name one natural source of each of the following acids:

(a) Citric acid

(b) Oxalic acid

(c) Lactic acid

(d) Tartaric acid

Why do isomeric branched alkanes normally exhibit lower boiling points than unbranched alkanes of the same carbon content?

A gas behaves more closely to an ideal gas at

In Na₂Co₃.10H₂O

What . Indicate in this formula?

__ is the process of extraction of metals by electrolysis.

What type of oxide are formed when nonmetals combine with oxygen

What is even odd series in periodic table in 4 ,5 and 6 periods.

(In byju study material it is given that Mendeleev failed to explain it in his table)

Which among the following exhibits incorrect collocation?

Which substance gets oxidised in the following reaction?

4Na + O₂ →2Na₂O

Principle of atomic conservation

Assertion: Acetic acid does not act as an acid in benzene.
Reason: Benzene does not accept a proton.

Complete and balance the given reaction:

$C_3{H}_8\left(g\right)+O_2\left(g\right)\to$

An experiment showed that in a lead chloride solution, 6.21 g of lead combined with 4.26 g of chlorine.

What is the empirical formula of this chloride? [Pb = 207, Cl = 35.5]

Why is it that non metals do not displace hydrogen from dilute acids?

When the volume of a definite mass of a gas is plotted against temperature at constant pressure, the graph obtained will be

(a) What was Mendeleev's basis for classification of elements ?

(b) Mendeleev's contributions to the concept of periodic table laid the foundation for the Modern Periodic Table.Give reasons.

Consider the following organic compounds :

$HCHO,C_2{H}_{5}OH,C_2{H}_{6}C{H}_{3}COOH,C_2{H}_{5}Cl$

Choose two compounds which can react in the presence of conc. $H_{2}S{O}_4$ to form an ester. Give the name and formula of the ester formed.

The IUPAC name of

List some of the defects in the modern periodic table.

What is the chemical formula of carbon dioxide?