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 Mcqs with Answers solved online.

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

Which of the following transition used as a catalyst in Haber’s process?

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

Which pair has trigonal planar geometry?

Which of the following is alkyl halide?

The Friedel craft reaction will be slowest for?

Which of the following step is not involved in NH4NO3 manufacturing?

Organic acids (Carboxylic acids) are considered as?

Number of shared pair of electrons between C and O in a molecule of CO is?

Which of the following statements is not correct?

Which of the following will not form enolate ion?

Buffer solutions are used in except?

Total heat content of a system is called?

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

Which of the following has highest ionization energy value?

Which one affects the specific rate constant?

If the energy of the activated complex lies close to energy of reactants, it means that reaction is?

Hydrolysis of CH3CH2CN will synthesize?

Number of H+ ions when 0.1 mole of sulfuric acid is completely ionized in water?

When HCl gas is passed through saturated solution of rock salt, the solubility of NaCl?

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

In contact process SO3 manufacturing is favour at low temperature but in actual practice the reaction is carried out at 400-600°C the reason is that?

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

Gold and silver are least reactive due to?

A solution of glucose is 10%. The volume in which 1g mole of it will be dissolved is

Which of the following is the example of proteins?

The stoichiometric calculations for a chemical reaction results in?

He normal amount of overhead ozone is?

Molecule in which the distance between two carbon atom is largest is?

All noble gases are?

The temperature at which nitrogen oxidized to NO during HNO3 production is?

When two amino acids are condensed releasing a water molecule, HN – C=O linkage thus formed is called?

18g glucose is dissolved in 90g water. The relative lowering of vapor pressure is equal to?

Which pair of electrons of elements will have the same chemical properties?

Identify the correct order of increasing energy?

Which substance does not oxidize easily?

What sis the colour of Mn+2?

Hydrolysis of amides gives the corresponding?

Benzene is heated in air with V2O5 at 450°C it undergoes?

In which process alcohol is produced?

There are _________ oxides of carbon are known.

Which of the following compounds has the highest % age of oxygen by weight?

Formation of cyanohydrin form an aldehyde is an example of?

Which of the following can differ in different acids?

Which of the following 0.1 m solution will have the lowest freezing point?

Ozone layer of stratosphere requires protection from indiscriminate use of?

Enzyme inactivation can be done by?

Maximum ammonia is used for the?

The ability of transition elements to form complexes is due to?

Which statement is correct about DNA?

The manufacturing of nitrogenous fertilizer’s from ammonia is the result of?

Iron can be prevented from rusting by?

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

Alanine is an amino acid but its nature is?

What is the Molailty of pure water?

Which one of the following is not a pollutant?

The relative lowering of vapor pressure is equal to?

Neo-pentyl alcohol is a type of alcohol?

The solubility of Fe(OH)3 is x molar per dm3. Its Ksp would be?

The 2nd order reaction becomes 1st when?

The largest number of moles are present in?

Acetyl chloride is soluble in which solvent?

1 gram formula refers to?

Which one of the following is alicyclic hydrocarbon?

Which one of the following has the maximum number of sp2 carbon atoms?

If an electrophile is the attacking reagent which one is most reactive?

What will be the pH of 1.0 mol dm-3 of H2X, which is only 50% disscociated?

When alkyl halide reacts with sodium metal in the presence of ether. Which product is formed?

The acidic character of amino acids is due to?

Isotopes differ in?

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

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

Which statement is incorrect about lipids

In the oxidation of unsymmetrical ketone using strong oxidizing agents like conc. HNO3, which carbon atom is preferentially attacked?

Which of the following can be used for the oxidative preparation of aldehydes from alcohols?

Which pair of halogens is present in halothanes?

During the formation of complex compound the Ligands bind with central metal ion/atom by?

SN1 reactions are favoured in which solvent?

/Which one among the following is good leaving group?

The exothermic process is?

The height of the peak in mass spectrum shows?

The main advantage of recycling is?

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

Strecker reaction is used for synthesis of?

What is the example of zwitter ions?

Dehydrohalogenation of RX occurs in the presence of?

When an unknown primary alcohol gives yellow precipitates of iodoform, it is most likely to be?

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

Which is example of pentose?

Which of the following is not primary pollutant?

In β – Elimination the resulting product is?

Tetraethyl lead is prepared by reacting ethyl bromide with?

A nanopeptide contains ________ peptide linkages.

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

A solution of KCl in water contains?

Chloromethane is used in?

The influence of temperature on reaction rate is predicted by?

Which one of the following doesn’t react quickly with water at room temperature?

Zinc does not show variable valency, because?

Total number of valance electrons of nitrogen atom in a ammonium ion is?

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