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Chemistry

Some basic concepts of chemistry

Structure of Atom

Classification of Elements and periodicity in properties

Chemical Bonding and Molecular Structure

States of Matter: Gases and Liquids

Chemical Thermodynamics

Some p-block Elements

Organic Chemistry: Some Basic Principles and Techniques

Hydrocarbons

Environmental Chemistry

$4g$ of impure $CaCO_3$ on treatment with excess HCl produces $0.88\; g\; CO_2$ . What is the percent purity of $CaCO_3$ sample?

asked Feb 19, 2019 by meena.clay6

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Vapour density of a gas is 22. What is its molecular mass?

asked Feb 18, 2019 by meena.clay6

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Which pair of species have same percentage of carbon? $(A) CH_3COOH \;and\; C_6H_{12}O_6\\ (B) CH_3COOH\; and\; C_2H_5OH \\ (C) HCOOCH_3 \;and\; C_{12}H_{22}O_{11} \\ (D) C_6H_{12}O_6 \;and C_{12}H_{22}O_{11}$

asked Feb 18, 2019 by meena.clay6

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How many moles of electrons weigh one kilogram?

asked Feb 18, 2019 by meena.clay6

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The density of $2M$ solution of sodium chloride (NaCl) $1.13\; g\; mol/litre$ . Calculate molality of the solution. $M= 2$ mol per litre.

asked Feb 18, 2019 by meena.clay6

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Calculate the molecular mass of Ethane $(C_2H_6)$

asked Feb 18, 2019 by meena.clay6

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Distinguish between pure substance and mixture

asked Feb 18, 2019 by meena.clay6

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What is limiting reagent?

asked Feb 18, 2019 by meena.clay6

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What is a stoichiometry?

asked Feb 18, 2019 by meena.clay6

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How are physicial properties different from chemical properties ?

asked Feb 15, 2019 by meena.clay6

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What is the difference between molecules and compounds ? give examples of each

asked Feb 15, 2019 by meena.clay6

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Write any four postulates of Daltons atomic theory

asked Feb 14, 2019 by meena.clay6

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Calculate the percentage composition of element in methanol $(CH_2OH)$

asked Feb 14, 2019 by meena.clay6

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Calculate the formula mass of KCl (Potassium chloride)

asked Feb 14, 2019 by meena.clay6

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State Law of Multiple proportions

asked Feb 14, 2019 by meena.clay6

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Write the formula used to calculate the % composition of elements

asked Feb 14, 2019 by meena.clay6

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What is meant by dimensional analysis?

asked Feb 14, 2019 by meena.clay6

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$6.02 \times 10^{20}$ molecules of urea are present in 100 mL of its Solution. The concentration of solution is

asked Feb 14, 2019 by meena.clay6

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When 22.4 L of $H_2(g)$ is mixed with $11.2\;L$ of $Cl_2(g)$ each of at STP the moles of HCl(g) formed is equal to

asked Feb 12, 2019 by meena.clay6

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If the concentration of glucose $(C_6H_{12}O_6)$ in blood is $0.9\;g\;L^{-1}$ . What will be the molarity of glugose in blood ?

asked Feb 12, 2019 by meena.clay6

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What will be the molarity of a solution , which contains 5.85 g of Nacl per 500 mL?

asked Feb 12, 2019 by meena.clay6

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The molarity of con.HCl is $1.15\;M$ . What volume of con. HCl is required to make 1.00 of 0.1M HCl

asked Feb 12, 2019 by meena.clay6

2 answers

The molarity of con. HCl is 1.15 M; What volume of con. HCl is required to make 1.00 of $0.1\;M\;HCl$

asked Feb 11, 2019 by meena.clay6

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How much AgCl will be formed by adding 200 ml of 5 M HCl to the solution containing 1.7 gms of $Ag NO_3$ ?

asked Feb 11, 2019 by meena.clay6

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What is weight of NaOH present in 250 cc of a 2M Solution ?

asked Feb 11, 2019 by meena.clay6

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Calculate the number of moles of $H_2SO_4$ present in $50\; ml$ of $0.2 \;m\;H_2SO_4$

asked Feb 11, 2019 by meena.clay6

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How are physical properties different from chemical properties ?

asked Feb 7, 2019 by meena.clay6

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How can we separate the componenets of a compound ?

asked Feb 7, 2019 by meena.clay6

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What is the difference between molecules and compounds ?

asked Feb 6, 2019 by meena.clay6

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n-Butane and iso-butane are .......... isomers

asked May 9, 2017 by meena.p

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Which of the following statements is false ?

asked May 9, 2017 by meena.p

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Which of the following isomerisms is shown by alkenes but not by alkanes ?

asked May 9, 2017 by meena.p

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A racemic mixture contains equal ........ of dextrorotatory and laevorotatory isomers.

asked May 9, 2017 by meena.p

2 answers

A compound whose molecules are superimposable on their mirror images even though they contain asymmetric carbon atoms is called

asked May 9, 2017 by meena.p

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Which of the following can exist as diastereomers ?

asked May 9, 2017 by meena.p

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Which of the following compounds can exhibit geometrical isomerism ?

asked May 9, 2017 by meena.p

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The simplest alkane capable of exhibiting chain isomerism has ..... carbon atoms.

asked May 9, 2017 by meena.p

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The functional isomers of ethers are

asked May 9, 2017 by meena.p

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Total number of conformations of ethane are

asked May 9, 2017 by meena.p

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Vapours of n-hexane when passed over special catalysts under high pressure and temperature given benzene. This process is called

asked May 9, 2017 by meena.p

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Propane when treated with conc. Nitric acid at 723 K gives

asked May 9, 2017 by meena.p

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With the increase in branching, the boiling point

asked May 9, 2017 by meena.p

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The addition reaction of carbon-carbon double bonds are

asked May 9, 2017 by meena.p

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The reactivity of a hydrogen in an alkane depends on

asked May 9, 2017 by meena.p

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Alkane molecules are not attacked by electrophiles or neutrophiles because they are

asked May 9, 2017 by meena.p

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Wide range of different hydrocarbons are separated into fractions

asked May 9, 2017 by meena.p

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Aromatic compounds are known as

asked May 9, 2017 by meena.p

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Due to presence of double bonds, alkenes are

asked May 9, 2017 by meena.p

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Carbon monoxide is a gas which is

asked May 9, 2017 by meena.p

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which of the following compounds can be used as antifreeze in automobile radiators ?

asked May 5, 2017 by meena.p

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