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Identify the correct statement(s)

A. All N - H bonds in $N{H}_4^{+}$ ion are identical after the formation

B. Formal charge of H and Cl in HCl are +1 and - 1 respecti

C. $\left[Fe\right(CN{)}_6{]}^{-4}$ ion has dative bonds but no ionic bonds

D. $N{H}_{4}Cl$ contains ionic , covalent and dative bonds

When chlorine reacts with ammonia , it is reduced to X, which further combines with excess of ammonia to form Y. Name this Y.

b) Potassium hydroxide is added to beaker B.

c)Ferric hydroxide is added to beaker C.

d)Lithium hydroxide is added to beaker D.

Which solution will form suspension?

Metal which is a poor conductor of heat is:

Formula of Lactic Acid

Hydrochloric acid reacts with a metal X to form a gas Y which burns with a 'pop' sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.

(a) Name X and Y.

(b) Write the chemical equation of the reaction of metal X with

(i) hydrochloric acid,

(ii) Sodium hydroxide solution.

When a student added Zinc granules to dilute $HCl$, a colourless and odourless gas was evolved, which was tested with a burning match stick, it was observed that:

One of the following molecular formulae represents a ketone. This formula is :
(a) $C_5{H}_{12}O$ (b) $C_6{H}_{12}{O}_2$ (c) $C_6{H}_{14}O$ (d) $C_6{H}_{12}O$

Find the number of oxygen atoms in 5 moles of $H_{2}S{O}_4$.

Predict the Group of an element X if its atomic number is 16.

Which of the following best describes the properties of a solution?

Identify the ether(s) from the following options.

1. 3

Write the name of C₆₀ ?

All the elements in a particular group have the same ________.

State the type of bonding in the following molecules.

(a) water, (b) calcium oxide,

(c) hydroxyl ion, (d) methane,

(e) ammonium ion, (f) ammonium chloride

In a parallel universe, if duplet & heptet rule is followed by elements, which of the following will be noble elements?

(i) F (ii) O (iii) S (iv) Ne

The correct functional group X and the reagent/reaction conditions Y in the following scheme are


(IIT-JEE, 2011)

Which of the following are components of an acid?

Why light cannot travel through opaque objects and why they can travel through transparent object ?

Which of the following compounds of boron does not exist in the free form?

1. 2

The outermost electronic configuration of the element with least electronegativity among the following is?

State one use each of the following non-metals:
Copper, Aluminium, Iron, Silver, Gold, Mercury

Difference between acids and bases

Which one of the following is neo-hexane or the isomeric form of hexane?

How is manganese extracted from manganese dioxide, $Mn{O}_2$? Explain with the help of an equation.

A galvanised article doesn't rust even if the zinc coating breaks. Why?

How is this possible that ionic compounds in the solid state do not conduct electricity and they do so in the molten state? Explain with an example. [2 MARKS]

The number of carbon atoms present in a signature, if a signature written by carbon pencil weights $1.2\times {10}^{-3}$ g is:

During the reaction of silver nitrate with hydrochloric acid, the white precipitate X is formed. This precipitate is insoluble in _____.

If we paint an iron substance what will happen to it???

Which code will represent the word MDFHLTR?

(a) What is the unique property of carbon atom? How is this property helpful to us?
(b) Explain why diamond is hard while graphite is soft (though both are made of carbon atoms).

Following information is given below. Calculate the closing capital

$\begin{array}{ccc}\text{Items}& \text{Jan 1, 2011}(Rs.)& \text{Dec 31, 2011}(Rs.)\\ \text{Creditors}& 5,000& 30,000\\ \text{Bills Payable}& 10,000& \underset{–}{}\\ \text{Loan}& \underset{–}{}& 50,000\\ \text{Bills receivable}& 30,000& 50,000\\ \text{Stock}& 5,000& 30,000\\ \text{Cash}& 2,000& 20,000\end{array}$

Calculation of profit or loss and ascertainment of statement of affairs at the end of the year (Opening balance is given)

The solution in which any liquid other than water acts as a solvent is called __.

In a bakery . the use of baking powder is essential. Why ?

Balance the following reaction

$3Fe$ + $4H_{2}O$ $\to$ $F{e}_3{O}_4$ + $\_H_2$

The oxidation state of Cu and Fe in $CuFe{S}_2$ are $+1$ and___respectively