Chemistry Mock Test-5

When enthalpy and entropy change for a chemical reaction are – 2.5 x 10³ cals and 7.4 cals deg⁻¹ respectively predict the reaction at 298 K is

Which among the following is an extensive property of the system

The precipitation occurs if ionic product is

At 25⁰C the pH value of a solution is 6, then the solution is

The change in oxidation state of sulphur when sulphur dioxide is passed in an acidified K₂Cr₂O₇ solution is from

When KMnO₄ reacts with KBr in alkaline medium gives bromate ion. Then oxidation state of Mn changes from +7 to

Which of the following is not efflorescent?

Which of the following has a tendency for covalent compound formation

The hybridisation of carbon in diamond ,graphite and acetylene is in the order of

In Lassaigne’s test red colour precipitate is obtained which is due to formation of

Which gas is formed when CaC₂ reacts with H₂O

Which of the following shows geometrical isomerism

In tetragonal crystal system, which of following is not true

Number of chloride ions around a single sodium ion in NaCl crystal is

In which cell the free energy of a chemical reaction is directly converted into electricity

Which of the following oxides is used in lead storage battery

The physical adsorption of gases on the solid surface is due to

The best coagulant for the precipitation of Fe(OH)₃ is

Which of the following substances is used, in laboratory, for fast drying of netural gases

Which one forms KHX₂ type compound

Lanthanides and actinides resemble in

Which one of the following elements constitutes a major impurity in pig iron

In the formation of [Ni(CN)₄]²⁻, the type of hybridisation involved is

In the silver plating of copper, K[Ag(CN)₂] is used instead of AgNO₃. The reason is

Among the following the most reactive towards alcoholic KOH is

In the following reaction CHCl₃ + C₆H₅NH₂ + 3NaOH → A + 3B + 3C the product A is

Ethyl alcohol exhibits acidic character on reacting with

Which one among the following contains a phenolic -OH group

Acetone reacts with Grignard reagent to form

Which of the following compounds gives benzoic acid on hydrolysis

N₂ gas will not be evolved upon reaction of HNO₂ with which of the following amines

The compound obtained by heating a mixture of ethyl amine and chloroform with ethanolic potassium hydroxide (KOH) is

The nucleic acid base having two possible binding sites is

Hexoses and pentoses are

Heroin is formed from …. by acetylation

The temperature above which a gas cannot be liquefied is called as

In the van der Waals equation, ‘a’ signifies

The compound which does not exist as hydrate form

The number of atoms in 0.004g of magnesium will be

Principal quantum number of an atom is related to the

The ratio of charge and mass would be greatest for

The long form of periodic table is based on

All the s-block elements of the periodic table are placed in the groups….

During change of O₂ to O₂⁻ ion,the electron adds on which one of the following orbitals

The molecular geometry of BF₃ is