Explore topic-wise InterviewSolutions in .

What is the name of the compound given below?

If the energy transferred to a tertiary consumer in a food chain is 10 J, how much energy was available to the primary consumer?

(a) 100 J (b) 500 J (c) 1000 J (d) 0.15 J

Write equations for the reactions of:
1. Iron with steam.
2. Calcium with water.
3. Potassium with water. [3 MARKS]

Identify the following reactions as either oxidation or reduction :

(i) $O+2e^{-}\to O^{2-}$ (ii) $K-e^{-}\to K^{+}$ (iii) $F{e}^{3+}+e^{-}\to F{e}^{2+}$

Name the gas evolved when zinc granules are treated/ heated with :

(a) hydrochloric acid solution

(b) sodium hydroxide solution

(a) Describe the reaction of potassium with water. Write the equation of the reaction involved.
(b) Write an equation of the reaction of iron with steam, Indicate the physical state of all the reactants and products.
(c) Which gas is produced when dilute hydrochloric acid is added to a reactive metal?

Find the oxidation states of S atoms in the following compounds and arrange them in decreasing order of maximum O.S. shown by S in them:

number of sigma and pi - bonds present in inorganic benzene

Why carbon form strong bonds with other carbon atoms like Hydrogen oxygen nitrogen and sulphur?

Slaked lime is obtained by adding ___ to lime.

A beaker contains water up to a height $h_1$ and K-oil above water up to another height $h_2.$ Find the apparent shift in the position of the bottom of the beaker when viewed from above. Refractive index of water is ${\mu }_1$ and that of K.oil is ${\mu }_2.$

Which of the following represents s - s, s - p and p - p overlap?

How can the valency of an element be determined if its electronic configuration is known? What will be the valency of an element of atomic number 9 (nine)?

Which of the following is true about the two statements?

Statement I : Reactivity of aluminium decreases when it is dipped in nitric acid.

Statement II A protective layer of aluminium nitrate is formed when aluminium is dipped in nitric acid.

Name the salt referred to as sal volatile.

Hybridization of central atom in $N{F}_3$ is _______.

When few pieces of iron are dropped into a blue coloured copper sulphate solution, the blue colour fades and eventually turns into light green due to the formation of:

Fill in the following blanks with suitable words:

(a) Decomposer organisms are ___in their action.

(b) In nature, all green plants are___ whereas animals are consumers.

(c) A series of organisms, each of which feeds on the next organism, the beginning of which is a green plant, is called a ___

(d) The science that deals with the inter-relationships of living things with one another and their environment is called___

(e) Plastic is a ___ material whereas paper is a ___material.

2nd member of homologous series having general formula $C_n{H}_{2n-2}$

A neutral organic compound is warmed with some ethanoic acid and a little of conc. $H_{2}S{O}_4$. Vapours having a sweet smell (fruity smell) are evolved. What type of functional group is present in this organic compound?

Which of the following is not an example of green chemistry?

Which of the following compound is used as an electrolyte when copper is purified by electrorefining?

Which of the following is/was name given to the solution of Hydrogen chloride in water?

Copper and tin were mixed together to make which metal?

Different components are obtained from crude oil by__________

A zinc ore gave $C{O}_2$ on treatment with a dilute acid. Identify the ore and write its chemical formula.

To which of the following ores, calcination process is not applicable?

All metals exist as solid at room temperature except the metal 'X'. Name the metal "X'.

Do calcium react with oxygen

Jyoti has 2 test tubes A and B. A contains a solution of $C{H}_{3}COONa$ and B has a solution of $NaCl$. She tested pH values of solution in A and B to find that –

Which of the following is position isomer of $C{H}_3-C{H}_2-\stackrel{O}{\stackrel{||}{C}}-C{H}_2-C{H}_3$?

Explain cathodic protection and alloying method to prevent corrosion with examples?

Mr. Ashok does not keep his books properly.
Following information is available from his books

$\begin{array}{ccc}\text{Items}& \text{Jan 1, 2005 (Rs.)}& \text{Dec 31, 2005 (Rs.)}\\ \text{Sundry Creditors}& 45,000& 93,000\\ \text{Loan from wife}& 66,000& 57,000\\ \text{Sundry Debtors}& 22,500& \underset{–}{}\\ \text{Land and Building}& 89,600& 90,000\\ \text{Cash in hand}& 7,500& 8,700\\ \text{Bank overdraft}& 25,000& \underset{–}{}\\ \text{Furniture}& 1,300& 1,300\\ \text{Stock}& 34,000& 25,000\end{array}$

During the year Mr. Ashok sold his private car for Rs. 50,000 and invested this amount into the business. He withdrew from the business Rs. 1,500 per month up to July 31, 2005 and thereafter Rs. 4,500 per month as drawings.
You are required to prepare the statement of profit or loss and statement of affairs as on December 31, 2005.

Which among the given processes use iron as a catalyst?

Hydrogen occupies a unique position in the modern periodic table.Justify the statement.

Need help fast.

During ionization, metals lose electrons.This change can be called as:

In graphite each carbon is attached with 3 other carbons so how it gets the octate? Explain.

An element ‘X’ belongs to 3rd period and group 16 of the Modern Periodic Table.

a) Determine the number of valence electrons and the valency of ‘X’.

b) Molecular formula of the compound when ‘X’ reacts with hydrogen and write its electron dot structure.

c) Name the element ‘X’ and state whether its a metal or a non- metal.