Sindh MDCAT 2020 Paper Page 6

Sindh MDCAT 2020 Paper

101- The transition element which does not show variable valency is:

A. Cu

B. Sc

C. Zn

D. Cr

View Answer

Answer : C. Zn

Description

102- Select the organic compound which belongs to Arene family:

A. CH2=CH2

B. CH3-O-CH3

C. CH3-NH2

D. C6H6

View Answer

Answer : D. C6H6

Description

103- The type of isomerism existing in a compound of molecular formula C2H6O is:

A. Functional group

B. Position

C. Chain

D. Metamerism

View Answer

Answer : A. Functional group

Description

105- General formula of cycloalkane is?

A. CnH2n+2

B. CnH2n

C. CnH2n+1

D. CnH2n-2

View Answer

Answer : B. CnH2n

Description

106- Electrophile in sulphonation of benzene is:

A. HSO4-

B. H2SO4

C. SO3

D. HSO3-

View Answer

Answer : C. SO3

Description

108- Acetonbenone can be formed by which of the following reaction of benzene?

A. Alkylation

B. Acylation

C. Halogenation

D. Nitration

View Answer

Answer : B. Acylation

Description

109- In alkanes, each Carbon has hybridization:

A. sp³

B. sp

C. sp²

D. dsp

View Answer

Answer : A. sp³

Description

110- When CH₃ is attached with the benzene ring, it makes the ring:

A. Good electrophile

B. Good nucleophile

C. Resonance hybrid

D. Extraordinary stable

View Answer

Answer : B. Good nucleophile

Description

111- Which of the following reaction has greater Kp than Kc (Kp > Kc)?

A. 2NO + Cl₂ = 2NOCl

B. 2SO2 + O₂ = 2SO3

C. 2NOCl = 2NO + Cl₂

D. NO2 + 3H2 = 2NH3

View Answer

Answer : C. 2NOCl = 2NO + Cl₂

Description

112- The equation N2g + 3H2g = 2NH3, represents:

A. Haber’s process

B. Contact process

C. Solvay process

D. Avogadro’s law

View Answer

Answer : A. Haber's process

Description

113- The unit of the rate constant is the same as that of the rate of reaction in:

A. Zero order reaction

B. First order reaction

C. Second order reaction

D. Third order reaction

View Answer

Answer : B. First order reaction

Description

114- The study of rates of chemical reactions and the factors that affect the rates of chemical reactions is known as:

A. Thermodynamics

B. Stoichiometry

C. Electrochemistry

D. Chemical kinetics

View Answer

Answer : A. Thermodynamics

Description

115- For the reaction A(g) → products, When the concentration of A(g) doubles, the rate of reaction increases four folds, which means it is:

A. Negative order reaction

B. First order reaction

C. Zero order reaction

D. Second order reaction

View Answer

Answer : D. Second order reaction

Description

116- For which of the following order of the reaction, rate of reaction is inversely proportional to the concentration of reaction?

A. 1st order reaction

B. 2nd order reaction

C. Negative order of reaction

D. Zero order of reaction

View Answer

Answer : C. Negative order of reaction

Description

117- The thermal energy at constant pressure is called:

A. Enthalpy

B. Internal energy

C. Heat capacity

D. Work done

View Answer

Answer : A. Enthalpy

Description

118- Born-Haber cycle is used to determine the lattice energies of:

A. Molecular solids

B. Metallic solids

C. Ionic solids

D. Covalent solids

View Answer

Answer : C. Ionic solids

Description

119- One calorie is equal to:

A. 4.18 KJ

B. 4.18 J

C. 0.418 KJ mol

D. 0.418 KJ

View Answer

Answer : B. 4.18 J

Description

120- The oxidation state of 'S' in the (S2O3)-2 is:

A. +4

B. +6

C. -2

D. +2

View Answer

Answer : D. +2

Description