Chemistry Mcqs Online With Answers

Chemistry is the branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.Chemistry is the scientific discipline involved with compounds composed of atoms, i.e. elements, and molecules, i.e. combinations of atoms, their composition, structure, properties, behavior and the changes they undergo during a reaction with other compounds. Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds.In the scope of its subject, chemistry occupies an intermediate position between physics and biology. It is sometimes called the central science because it provides a foundation for understanding both basic and applied scientific disciplines at a fundamental level.Chemistry was preceded by its protoscience, alchemy, which is an intuitive but non-scientific approach to understanding the constituents of matter and their interactions. Just follow the Mcqs online quiz being dispatched over here with respect to your preparation for entry admission test NTS PPSC OTS PTS and missllenous job exams simultaneously.

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Chemistry Mcqs Online With Answers for NTS PPSC Entry Test Classes

Chemistry

Chemistry Mcqs with Answers solved online.


The hydrolysis of Benzenetrizonide will yield three moles of?

The alkyl halide molecule on which the nucleophilic attacks is called?

Carboxylic acid react with ammonia to form which salt?

Which one of the following is not affect of acid rain?

2-Pentanone and 3-Pentanone are?

A compound contains 50% sulphur and 50% oxygen by mass. The empirical formula of the compound is?

Which of the following halogen shows metallic luster?

. In a given system, water and ice are in equilibrium, if the pressure is applied to the above system then?

Iron can be prevented from rusting by?

A solution has 92g ethanol, 96g methanol and 90g water. Mole fraction of water in the solution is?

Which of the following reacts with aqueous alkaline iodine?

Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide and aluminum chloride is known as?

Which of the following contains 1 mole of the stated particle?

A solution of KCl in water contains?

Which salts make the water hard?

Sulphuric acid is king of chemicals, in its reactions it generally not act as?

Elevation of boiling point can be best studied by?

The acidic character of amino acids is due to?

Saturated triglycerides of fatty acids?

All alpha amino acids exist largely in proteins in the form of a dipolar structure is called?

Which one is the most important use of nitric acid?

The work of concentrated H2SO4 in esterification process is as?

Which of the following formula is more reactive for hydrolysis?

Dehydration of alcohols with conc. H2SO4 at 180°C gives?

The main advantage of recycling is?

Tetraethyl lead is prepared by reacting ethyl bromide with?

End to end overlapping of orbitals give rise to the formation of?

What is the shapes of p orbitals?

Here the strongest acid is?

Change in enthalpy of ∆H a system can be calculated by following relationship?

Which of the following is an example of solid in solid solution?

The oxidation state of carbon-atom in glucose is?

The unit of rate constant of second order reaction is?

SN1 reactions are favoured in which solvent?

The contact process was first developed by?

One mole of a hydrocarbon X reacts completely with one mole of hydrogen gas in the presence of a heated catalyst. What could be the formula of X?

Acetyl chloride is soluble in which solvent?

The main cause of ozone depletion is?

Thioalcohol is prepared when alkyl halide is reacted with?

Reduction of an aldehyde using NaBH4 gives?

Most of the reactions which give stable products are?

Phenol on treatment with dil. HNO3 at low temperature give?

NHCommunities are _________ collection of organism.

The oxidation state of transition element is usually?

Buffer solutions are used in except?

Colligative properties can be used for calculating?

Tertiary alcohols with acidified dichromate gives?

Which one of the following radical is called benzyl radical?

Ea appears as a potential energy hill between _________ for carrying out the reaction.

The relative lowering of vapor pressure is equal to?

In esterification reaction, which one of the following bonds of alcohol undergo cleavage?

When the solvent is containing non volatile solute particles, then?

That solution which possess maximum concentration of solute at given temperature is known as?

One mole of SO2 contains?

Which of the following cell can convert chemical energy directly into electrical energy?

Non-stoichiometric compounds of transition elements are called?

Strecker reaction is used for synthesis of?

Ozone layer of stratosphere requires protection from indiscriminate use of?

The separation of different isotopes in the mass spectrometer is done on the basis of?

A nanopeptide contains ________ peptide linkages.

Which one is mono haloalkane?

What is the % of nitrogen in urea (NH2CONH2)?

Which one used in containers and pipe work for reactive and corrosive chemicals?

Why bleaching powder is always preserved in sealed plastic bags?

During an exothermic or endothermic reaction which one of the following formula is used to calculate the amount of heat evolved or absorbed

Oxidation of SO2(g) in the presence of V2O5(s) is an example of?

If 75% of any given amount of radioactive element disintegrates in 60 min. The half life of radioactive element is.

1 gram molecule refers to

“Al” metal is extracted from its ________ during electrolysis.

Acid rain can be due to the absorption of?

Which one metal shows maximum oxidation state?

Which compound has only one structural form?

The optimum pH for enzyme activity is?

Which one increases by common ion effect except?

The quality of raw water is improved by?

Excess alcohol at low temperature in presence of conc. H2SO4 produce?

Which one of the following is the secondary pollutant of atmosphere?

Hydrolysis of CH3CH2CN will synthesize?

Hydrolysis of amides gives the corresponding?

Which pair can be used as a reactant for the preparation of acetyl chloride?

Which is example of pentose?

Which one can be used as test for phenol?

pH of an aqueous solution is 3.0 at 25°C. The hydrogen ion concentration in the solution would be?

Which one tells amount of the free fatty acid?

Milk of magnesia is?

Which one of the following doesn’t react with water even at red hot temperature?

In a saturated solution of AgCl, the molar concentration of Ag+ and Cl- is 1.0 x 10-5 M each. What is the value of Ksp?

Elimination bimolecular reactions involve?

Which one of the following is the same for SiO2 and CO2?

Tertiary alkyl halide give?

Which statement is incorrect about reactivity of alkyl halides?

In a double bond connecting 2 atoms there is a sharing of?

Which of the following is used as a catalyst for esterification?

Which of the following statements is not correct?

Which of the following is alkyl halide?

What sis the colour of Mn+2?

The substances which don’t dissolve in reasonable amount in particular solvent are?

Which of the following is not a colligative property?

Alcohol in which – OH group is attach to carbon which is further attach to only one alkyl group is?

If ionic product is equal to Ksp then the solution is?

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