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.

The height of the peak in mass spectrum shows?

The Friedel craft reaction will be slowest for?

Which one of the following is not a pollutant?

Which ester is used as orange flavor?

One mole of SO2 contains?

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

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

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

Which of the following has maximum reactivity in nucleophilic substitution reactions?

Carboxylic acids react with active metals (Na, K, Ca and Mg) to form their salt and?

The cell in which electrical energy is converted into chemical energy is?

Polyester resins are used in?

10g NaOH is dissolved in 1000g water. The molality of NaOH is?

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?

Elimination bimolecular reactions involve?

What sis the colour of Mn+2?

Which of the following fertilizer provides to soil 75% neutrients?

Standard hydrogen electrode has an arbitrary fixed potential of?

All noble gases are?

Alkane nitrilescan be prepared by treating alkyl halide with?

Which one metal shows maximum oxidation state?

Which statement is incorrect about formation of ester?

Most of the reactions which give stable products are?

Enzyme inactivation can be done by?

Which type of reactions are more abundant in organic reaction?

Which functional group participates in disulphide bond formation in protein?

Which of the following reacts with aqueous alkaline iodine?

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

The production of acid amide involves the reaction of ethanoic acid with?

Which of the following not has equal number of atoms as that in 6g Molybdenum (Ar : 96)

The correct order of equivalent conductance at infinite dilution among LiCl, NaCl and KCl is?

Maximum ammonia is used for the?

Which of the following is the strongest alkali?

Iron can be prevented from rusting by?

Which one is very weak acid?

Acetic acid (ethanoic acid) can be prepared by ethanol under?

The process in which the orbitals of different energies and shape mix with each other to give equivalent hybrid orbitals is called?

Which one among the following is not a good leaving group?

The main cause of ozone depletion is?

The unit of rate constant of second order reaction is?

Dehydrohalogenation of RX occurs in the presence of?

Which compound will readily undergo sulphonation?

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?

Which substance is mostly used as coagulant to remove the suspended particles of raw water?

Which of the following compounds has non directional bond?

A smuggler was caught by Airport police and 24 g of diamond was recovered from him. How many atoms of carbon he was carrying?

Milk of magnesia is?

Which of the following ketones will produce propanoic acid only after oxidation by acidified potassium dichromate?

Which of the following is alkyl halide?

Isotopes are?

Which of the following test is used to identify amino acids?

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

Nitric acid is prepared commercially by?

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

All II-A group elements react with halogens to form halides of the type?

Which substance does not oxidize easily?

Which of the following is not a characteristic of SiO2?

Oxidation of SO2(g) in the presence of NO(g) catalyst is an example of?

Non-stoichiometric compounds of transition elements are called?

Fats and oils are the example of?

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

. In laboratory the decomposition of hydrogen peroxide is carried out best by using _____ catalyst.

During combustion analysis, which one is used for absorbing carbon dioxide?

Arrhenius equation can be used for evaluating?

When alcohols react with Na metal, the alkoxide ion thus formed is a strong?

Reduction of an aldehyde using NaBH4 gives?

Which of the following will not give iodoform test?

Formation of cyanohydrin form an aldehyde is an example of?

Carbohydrate containing aldehyde is called?

Which of the following is not a colligative property?

2-Pentanone and 3-Pentanone are?

In β – Elimination the resulting product is?

Ozone layer of stratosphere requires protection from indiscriminate use of?

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

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

SN1 reactions are favoured in which solvent?

Reduction of ketone using NaBH4 gives?

Which one tells amount of the free fatty acid?

Carboxylic acid react with ammonia to form which salt?

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

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

Organic acids (Carboxylic acids) are considered as?

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

Tertiary alcohols with acidified dichromate gives?

During the formation of an ester from acetic acid, what actually happens?

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

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

Which one is mono isotopic element?

Ethylene is oxidized to acetaldehyde on commercial scale by the use of the catalyst which is?

Electrochemical series is useful in?

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

What is the molecular formula of Benzenetriozonide?

Which one is the most important use of nitric acid?

Picric acid can be prepared from phenol by?

. A peptide having molecular mass less than 10,000 is called?

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

In which of the following Equilibiria will Kc and Kp have not the same value?

Gram atoms of hydrogen in 5.5g H2?

Thioalcohol is prepared when alkyl halide is reacted with?

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

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