Explore topic-wise InterviewSolutions in .

What is the pH of nitrogen dioxide?

What are the functional groups present in the given compound?

Three organic compounds A, B and C have the following molecular formulae :
A $C_4{H}_8{O}_2$
B $C_4{H}_{10}O$
C $C_4{H}_{8}O$
(a) Which compound contains an alcohol group? Write its name and structural formula.
(b) Which compound contains a carboxyl group? Write its name and structural formula.
(c) Which molecular formula can represent an aldehyde as well as a ketone? Write the names and structural formulae of the aldehyde and ketone represented by this molecular formula.

Name the simplest ketone.

Which of the following is correctly matched with respect to reactors?

Due to heavy rains the following minerals are leached away from laterite soil

What is an alloy and how are alloys considered as solid solutions?

How can we reuse paper and glass?

Protons and Neutrons are collectively called___.

Which combination is best explained by the coordinate covalent bond

The physical state of alkanes upto butane at ordinary temperature are in ___ state.

Given one example each of the following
(i) A molecule containing a single covalent bond
(ii) A molecule containing a double covalent bond
(iii) A molecule containing a triple covalent bond
(iv) A compound containing an ionic bond

Under what soil conditions do you think a farmer would treat the soil of his fields with quicklime (calcium oxide), or slaked lime (calcium hydroxide) or chalk (calcium carbonate) ?

Consider the reaction :

$KBr\left(aq\right)+AgN{O}_3\left(aq\right)$ $⟶$ $KN{O}_3\left(aq\right)+AgBr\left(s\right)$

This is an example of :

(a) decomposition (b) combination reaction

(c) double displacement reaction (d) displacement reaction

Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.

(a) What will be the action of solution A on litmus?

(b) What will be the action of solution B on litmus?

(c) Name any two substances which can give solutions like A.

(d) Name any two substances which can give solutions like B.

(e) What sort of reactions takes place when solution A reacts with solution B?

The ratio of positive ions to negative ions in calcium chloride is

when does Sodium chloride conducts electricity?

On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?

(a) increases (b) decreases

(c) remains the same (c) first increases then decreases

$ZnC{O}_3$ is reduced by the process of:

(a) What is meant by the reactivity series of metals? Arrange the following metals in an increasing order of their reactivities towards water:
Zinc, Iron, Magnesium, Sodium
(b) Hydrogen is not a metal but still, it has been assigned a place in the reactivity series of metals. Why?
(c) Name one metal more reactive and another less reactive than hydrogen.
(d) Name one metal which displaces copper from copper sulphate solution and one which does not.
(e) Name one metal which displaces silver from silver nitrate solution and one which does not

Pure gold is equal to ___________.

Classify the following elements as metals, non metals or metalloids: [3 MARKS]
(a) Sn (b) Br (c) Ho (d) Cd (e) Si (f) Xe.

Question 9 (iii)
Which part of the digestive canal is involved in:
(iii) killing of bacteria __.

The molecular formula of a hydrocarbon is C₅H₁₀. Name its homologous series.

Tell me the different properties of electronic congregation or quantum numbers .

what is energy management?

When Hydrogen atoms combine with carbon atoms to form methane, ___ is released.

Smelting of iron is carried out in

Antacids used to treat indigestion in the stomach contains:

Which metal is used for coating in galvanization?

Write a short note on electronic view of non-metals. [3 MARKS]

Which of the following is correct regarding a chemical reaction?

Find the number of moles and the number of H atoms present in $9.033\times {10}^{23}$ molecules of water.

An element X reacts with hydrogen, when heated, to from a covalent hydride $H_{2}X.$ If $H_{2}X$ has a smell of notten eggs, the element X is likely to be:

(a) Which metal is extracted from calamine ore?
(b) Name one ore of mercury. Which mercury compound is present in this ore? write its chemical formula
(c) How is copper extracted from its sulphide ore(copper glance), $C{u}_{2}S$. Explain with equations of the reactions involved.
(d) What is an alloy ? Give two examples of alloys.
(e) How are the properties of an alloy different from those of the constituent elements?

Considering the binding energy per nucleon of the deuterium isotope's nucleus ${}_1^{2}H$ is 1.12 MeV, what will be the same for the protium isotope's nucleus ${}_1^{1}H$?

$NaH{CO}_3$ is chemical formula of?

For each substance listed below, explain its significance in the extraction of aluminium:

(a) Bauxite, (b) Sodium hydroxide,

(c) Cryolite, (d) Graphite.

-CHO represents the functional group of:

The species in which the central atom uses ${sp}^2$ - hybrid orbitals in its bonding is

Which of the following molecule does not have any lone pair of electrons on the central atom?