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.

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

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

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

Cellulose has structure like?

Molal boiling point constant is the ratio of the elevation in the boiling to?

The correct set of four quantum numbers for the valence electron of rubidium (Z = 37) is?

Which ester is used as orange flavor?

Which of the following statements is not correct?

The following molecules has linear structure except?

Arrhenius equation can be used for evaluating?

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

Total number of hybrid orbitals of all carbon atoms in benzene are?

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

Electrochemical series is useful in?

Which statement is correct about DNA?

Gold and silver are least reactive due to?

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

Fats and oils are the example of?

Alanine is an amino acid but its nature is?

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

Carboxylic acid react with ammonia to form which salt?

Which of the following property of IIA group decreases down to the group?

An element having high ionization energy and tends to be chemically in-active would most likely to be a/an?

Reduction of ketone using NaBH4 gives?

Which one is not dicarboxylic acid?

Total heat content of a system is called?

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

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

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?

The amino group in amino acids can be attached by to any carbon other than?

Oleum is prepared by?

The largest number of moles are present in?

What will be the pH of 1.0 mol dm-3 of NH4OH, which is 1% dissociated?

Which one tells amount of the free fatty acid?

Which type of reactions are more abundant in organic reaction?

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

The unit of rate constant is the same as that of the rate of reaction in?

Which statement is incorrect about formation of ester?

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

Major sources of NOx pollutants are?

Which of the following compounds has non directional bond?

Hydrolysis of amides gives the corresponding?

Which is example of pentose?

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

Lack of essential amino acids in diet leads to the disease.

Baeyer’s reagent is?

Buffer solutions are used in except?

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

Which one of the following species is not an electrophile?

Acetyl chloride is soluble in which solvent?

Haloform test is given by?

Which one metal shows maximum oxidation state?

When we mix SO3 with conc. H2SO4 in contact process, the product obtained is?

The work of concentrated H2SO4 in esterification process is as?

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

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

Carbohydrate containing aldehyde is called?

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

For d2sp3 hybridization, the expected shape is?

Thioalcohol is prepared when alkyl halide is reacted with?

Which of the following group of periodic table possess the elements of all the three physical states of matter?

What is the shapes of p orbitals?

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

The quality of raw water is improved by?

Which of the following can be used for alcohol denaturing?

What is the Colour of K2Cr2O7 ?

The electronic configuration of an element is 1s2 2s2 2p3. This represent a/an?

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

. In Contact process for the manufacture of sulfuric acid, the most important reaction occurs in the catalyst chamber. Which set of the reactants and the catalyst are correct?

One mole of SO2 contains?

Ozone layer of stratosphere requires protection from indiscriminate use of?

Primary alcohols upon oxidation with acidified dichromate gives?

NHCommunities are _________ collection of organism.

Elimination bimolecular reactions involve?

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

Here the strongest acid is?

For which one of the following pairs of compounds can the members be distinguished by means of Tollen’s tests.

Nitric acid is prepared commercially by?

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

Which statement is incorrect about reactivity of alkyl halides?

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

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

There are _________ oxides of carbon are known.

Which of the following is not primary pollutant?

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

Which one alcohols is aromatic?

Inorganic compound of nitrogen are not commonly found as minerals because?

The best and the most recommended technology for solid waste management is?

When 0.5 moles of Al2(SO4)3 are dissolved in water, total number of particles produced?

Which one is chemical method for the determination of rate of reaction?

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

/Which one among the following is good leaving group?

The technique which is not used to separate isotopes?

250cm3 of 0.2 molar potassium sulphate solution is mixed with 250cm3 of 0.2 molar KCl solution. The molar concentration of K+ ions is?

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

When the concentration of reactant in the reaction is increased by 8 times, the rate increased only by 2 times. what is the order of reaction?

Which substance does not oxidize easily?

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

Isotopes are?

The ability of elements to act as reducing agent _________ down to electrochemical series.

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