Sindh MDCAT 2022 Paper Page 5

Sindh MDCAT 2022 Paper

81- 2-chloropropane is heated with Na metal product is 2,3 dimethyl butane reaction is:

A. Dehydrohalogenation

B. Wurtz reaction

C. Dehydration

D. Catalytic hydrogenation

View Answer

Answer : B. Wurtz reaction

Description

82- At equilibrium in a reversible reaction ?

A. The rate of backward reaction > rate of forward reaction

B. The rate of forward reaction > rate of backward reaction

C. The rate of forward reaction is same at backward reaction

D. The concentration of reactants and products becomes constant and rate of forward reaction is same as the rate of backward reaction

View Answer

Answer : D. The concentration of reactants and products becomes constant and rate of forward reaction is same as the rate of backward reaction

Description

84- Rate of reaction increases by addition of catalyst because ?

A. Catalyst reacts with reactant

B. Catalyst reacts with product

C. Energy of activation increases

D. Energy of activation remains same

View Answer

Answer : D. Energy of activation remains same

Description

84- Reaction H2 + Cl2 → 2HCl is a ?

A. First order

B. Half order

C. Third order

D. Zero order

View Answer

Answer : B. Half order

Description

85- The comparison of ratio of diffusion of H2 and O2 is in the ratio of ?

A. 2:1

B. 1:4

C. 3:2

D. 4:1

View Answer

Answer : D. 4:1

Description

86- Grignard reagent, e.g. methyl magnesium halide reacting with methyl halide product is:

A. N-propyl chloride

B. Butane

C. Ethene

D. Methane

View Answer

Answer : C. Ethene

Description

87- HOOC-COOH has IUPAC name ?

A. Acetic acid

B. Oxalic acid

C. Diethanoic acid

D. Ethandioic acid

View Answer

Answer : D. Ethandioic acid

Description

88- Pulverized CsCu3 reacts faster because of the increase in ?

A. Surface area

B. Volume

C. Surface tension

D. Temperature

View Answer

Answer : A. Surface area

Description

89- Oxidation of K2MnO4 by Cl2 Is to manufacture:

A. MnO3

B. K2Cr2O4

C. KMnO4

D. K3CrO4

View Answer

Answer : C. KMnO4

Description

90- Aldehydes reacts with:

A. It is always difficult to oxidize aldehyde

B. Mild oxidizing agents and strong oxidizing agents

C. Only strong oxidizing agent

D. Only mild oxidizing agents

View Answer

Answer : B. Mild oxidizing agents and strong oxidizing agents

Description

91- Benzene is subjected to alkylation, nitration and oxidation the product is:

A. o & p nitro toluene

B. m-nitro toluene

C. o & p nitro benzoic acid

D. o-nitro benzoic acid

View Answer

Answer : C. o & p nitro benzoic acid

Description

92- In Castner-Kellner cell ?

A. NaOH + H2 are produced at cathode

B. Cl2 is produced at anode

C. NaOH + H2 at anode

D. NaOH + H2 are produced at cathode and Cl2 is produced at anode

View Answer

Answer : D. NaOH + H2 are produced at cathode and Cl2 is produced at anode

Description

93- Bakelite is a polymer:

A. Formaldehyde and acetone

B. Two amino acid molecules

C. Formaldehyde and phenol

D. Acetone and carboxylic acid

View Answer

Answer : C. Formaldehyde and phenol

Description

94- Phenol when subjected to nitration the product is:

A. o-nitro phenol

B. p-nitro phenol

C. o-nitro phenol & m-nitro phenol

D. o-nitro phenol and p-nitro phenol

View Answer

Answer : D. o-nitro phenol and p-nitro phenol

Description

95- Heating a mixture of chromite ore (FeOCr2O3) & K2CO3 in air to manufacture ?

A. K2CrO4

B. KMnO4

C. K2Cr2O3

D. K2MnO4

View Answer

Answer : A. K2CrO4

Description

96- A strong electrolyte is one that completely in solution ?

A. Reacts

B. Disappears

C. Ionizes

D. Never ionizes

View Answer

Answer : C. Ionizes

Description

97- Cation & anion formed which combines to form crystal lattice:

A. Cation and anion both are isoelectronic to nearer noble gases

B. Cation & anion both are isoelectronic to nearest noble gas & number of electrons is lost metal & no of electrons lost by non-metal

C. Only anion is isoelectronic to nearest noble gases

D. No of electrons lost by metal & no of electrons gained by non-metal is equal

View Answer