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The valency of nitrogen in ammonia $({NH}_{3})$ is

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Important Questions on Atom, Molecule and Chemical Reaction

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

The formulae of an oxide of an element

M

MO

. The formulae of its phosphate is

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

If the vapour density of the carbon containing gaseous substance is

13

, which of the following is its molecular formula?

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

An element X with atomic number

13

combines with another element Y of atomic number

17

. The formula of the compound formed and the nature of the bond will be:

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

A solution of a substance 'X' is used for whitewashing.

(a) Name the substance 'X' and write its formula.

(b) Write the reaction of the substance with water.

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

An organic compound contains

60 % C; 4.48 % H

and

35.5 % O .

Its empirical formula is

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

The empirical formula and molecular mass of a compound are

{CH}_{2} O

and

180 g

respectively. The molecular formula of the compound will be

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

The molecular formula of chloride of a metal M is

{MCl}_{2}

. The molecular formula of an oxide of M will be:

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

Find the empirical formula and the molecular formula of an organic compound from the data given below:

$C = 75.92 %, H = 6.32 % and N = 17.76 %$

The vapour density of the compound is $39.5$ . $[C = 12, H = 1, N = 14]$

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

Molecular formula of a compound is

C_{6} H_{18} O_{3}

. Find its empirical formula.

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

In a compound

C, H

and

N

are present in

9 : 1 : 3.5

by weight. If molecular weight of compound is

108

, the molecular formula of compound is

HARD

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

The ratio of mass percent of

C and H

of an organic compound

(C_{X} H_{Y} O_{Z})

6 : 1 .

If one molecule of the above compound

(C_{X} H_{Y} O_{Z})

contains half as much oxygen as required to burn one molecule of compound

C_{X} H_{Y}

completely to

{CO}_{2}

and

H_{2} O .

The empirical formula of the compound

C_{X} H_{Y} O_{Z}

HARD

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

Define valency by taking examples of silicon and oxygen.

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

The number of hydrogen atoms, which combine directly or indirectly with one atom of an element, so as to form a chemical compound is:

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Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

The valency of phosphate in

{Na}_{3} {PO}_{4}

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

Write the chemical name of

{KClO}_{3}

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

{Na}_{2} {CO}_{3}

is:

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

Which amongst the following has +2 valency?

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

The formula of calcium hydrogen carbonate is:

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

Write the chemical name of

Mg ({HCO}_{3})_{2}

EASY

Science>Chemistry>Atom, Molecule and Chemical Reaction>Valency

Formula of a compound formed by

{Fe}^{3 +}

and

{SO}_{4}^{2 -}

is:

The valency of nitrogen in ammonia (NH3) is

Important Questions on Atom, Molecule and Chemical Reaction

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The valency of nitrogen in ammonia $({NH}_{3})$ is