In alkanes, each carbon has hybridization:

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

The raindrop acquires a spherical shape and ink spread over blotting paper due to:

NTS 2010
Chemistry
Chemical Bonding
Elimination Tool:

By treating CO2 with Grignard’s reagent, the following compound is obtained;

NUMS 2019 Cancelled
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

One mole of substance at STP has:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Stoichiometry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

To avoid the formation of toxic compounds with chlorine, which substance is used for disinfecting water?

NUMS Mock 1
Chemistry
s and p Block Elements

The breakdown of a substance with current is:

NUMS 2020
Chemistry
Electrochemistry
Elimination Tool:

Oxidation state of P in Mg2P3O5 Is

The atoms of hemoglobin is heavier than H-atoms

PMC Practice 23
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which of the following shows the Planck’s quantum theory?

NUMS Mock 3
Chemistry
Atomic Structure

Chemical formula of powder used in carom board is?

The aromatic compound having the functional group “OH” attached to It Is?

The amount of energy released by absorbing an electron in the valence shell is:

NTS 2013
Chemistry
Atomic Structure
Elimination Tool:

Activation of the benzene ring in aniline can be decreased by treating with:

NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:

The carbonates of alkali metals are soluble in water except:

NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:

Consider the following reaction

N2(g) + O2(g) 2NO (g) Kc- 0.1 at 2000 C

If the original concentration of N2 and O2 were 0.1 M each. Calculate the concentrations of NO at equilibrium.

NTS 2016 DUHS & JSMU
Chemistry
Chemical Equilibrium
Elimination Tool:

Which one of the following reagents is used to distinguish between aldehydes and ketones?

NUMS Mock 1
Chemistry
Aldehydes and Ketones

All of the following substances can act as Lewis acids except:

NUMS Mock 3
Chemistry
Acids, Bases and Salts

The oxidation state of Cl in HClO4 is:

NTS 2019
Chemistry
Solution and Colloids
Elimination Tool:

Which one of the following statements is true?

NUMS 2016
Chemistry
s and p Block Elements
Elimination Tool:

Which of the following forms a layer of oxide on its exposure to moisture?

Amino acids are prepared by?

Lowering of vapor pressure Is directly proportional to: a)

What are the values of orbital quantum number/0 and magnetic quantum number(m) for subshell?

which one of the following Is the oxidation number of Iodine in I2?

The order of reactivities of the following alkyl halides for an SN2 reaction is:

NUMS 2016
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The solubility product of AgCl is 2.0×10-10 mol-2 dm-6. The maximum concentration of Ag+1 ions in the solution is:

NTS 2019
Chemistry
Chemical Equilibrium
Elimination Tool:

Which of the following does not show variable valency?

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

The average atomic mass of Boron is 10.8. It has two isotopes of masses 10 and 11 respectively. What is the percentage of isotope with the average mass of 10?

NUMS Mock 4
Chemistry
Stoichiometry

Which of the following method is used to prepare Ethylene glycol from ethene?

PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:

The conversion of phenol to benzene in the presence of zinc involves:

NUMS Mock 3
Chemistry
Alcohol, Phenols, and Ethers

Example of nucleophile is:

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

All the gasses at 212.44 cm3 have

The chemical analysis of a compound having molecular mass 188 gives, C=12.8%, H=2.1% and Br=85.1%. Its molecular formula is:

NTS 2014
Chemistry
Stoichiometry
Elimination Tool:

950 torr corresponds to:

NTS 2010
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Which of the following Is formula of Benzyl Alcohol?

What happens when one mole of ethane is mixed in the dark at room temperature with six moles of chlorine?

NTS 2017
Chemistry
Hydrocarbons
Elimination Tool:

Maximum number of electrons in a subshell is given by:

NUMS Mock 1
Chemistry
Atomic Structure

Human blood maintains its pH between

UHS 2016
Chemistry
Solution and Colloids
Elimination Tool:

Breaking of neutron produces?

Aromatic compounds burn with a sooty flame because:

NUMS Mock 3
Chemistry
Fundamental Principles of Organic Chemistry

Gases behave ideal at

The osmotic pressure of equimolar solutions of BaCl2, NaCl and sucrose will be in the order:

NUMS 2016
Chemistry
Solution and Colloids
Elimination Tool:

The compound in which carbon uses only its sp3 – hybrid orbitals for bond formation is?

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

• Which of the following does not occur in Free State?

Which of following Is poison for catalyst:

) Melting point of methyl alcohol is:

Phenol is reduced to benzene on reaction with:

Which of the following has highest boiling point?

Which of the following statements is true?

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

Dipole moment of H2 is:

Which of the following compounds will give a secondary alcohol after reaction with NaBH4?

NUMS Mock 3
Chemistry
Alcohols, Phenols and Ethers

A crystal system having all sides (a, b and c) unequal and anglesα = β = γ= 90 is:

NUMS Mock 3
Chemistry
States of Matter – Gases, Liquids and Solids

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

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

Born Haber cycle is used to determine:

PMC 2020
Chemistry
Thermochemistry
Elimination Tool:

What is the product of both fermentation reactions and fractional distillation:

NTS 2010
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

lanthanide Contraction is phenomenon of block :

How many sigma groups are there in benzene?

NTS 2014
Chemistry
Hydrocarbons
Elimination Tool:

Solubility of Borax decahydrate at 100C is

The smog having high contents of SO2 is called:

NUMS 2019 Reconduct
Chemistry
Macromolecules
Elimination Tool:

SN2 reactions can be best carried out with:

NTS 2019
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Hybridization in diamond is

The number of isomers of C3H7-Cl are _______

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Salts of weak bases react with strong acids to give a/an

NUMS Mock 1
Chemistry
Acids, Bases and Salts

Which of the following will not undergo aldol condensation?

PreMedPK MDCAT Mock 3
Chemistry
Aldehydes and Ketones
Elimination Tool:

How would an ammonium group affect the benzene ring for subsequent reactions?

NTS 2017
Chemistry
Alkyl Halides and Amines
Elimination Tool:

In the atmosphere, CO2is about?

NUMS 2018
Chemistry
Environmental Chemistry
Elimination Tool:

Rayon is ____?

PMC Practice 10
Chemistry
Industrial Chemistry
Elimination Tool:

______ is needed in thyroxine, the hormone of thyroid gland.

NTS 2012
Chemistry
Chemistry of Life
Elimination Tool:

Which of the following compounds react slower than benzene in electrophilic substitution reaction?

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

The value of R (the gas constant) is

NTS 2019
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

The test used to distinguish among primary, secondary, and tertiary alcohols is:

NUMS 2017
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Commercial hydrogen is obtained from:

NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:

H2 and O2 are diffusing under the same condition how much H2 gas will diffuse?

NUMS Mock 4
Chemistry
States of Matter – Gases, Liquids and Solids

Which is not a meta directing group:

NUMS Mock 1
Chemistry
Fundamental Principles of Organic Chemistry

ΔH = ΔE + PΔV is the change in enthalpy at constant ________.

NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:

Which of the following is not a physical property of ethers?

PreMedPK MDCAT Mock 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Carbonyl group undergoes:

NUMS 2019 Reconduct
Chemistry
Aldehydes and Ketones
Elimination Tool:

The addition of HBr to an unsymmetrical alkenes follows?

PreMedPK MDCAT Mock 2
Chemistry
Hydrocarbons
Elimination Tool:

Change in extensive property is proportional to the change in ______ of material.

NUMS 2018
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Magnesium oxide is used in the making of the lining of blast furnaces. It is extracted from seawater as follows. Aqueous calcium hydroxide is added to seawater.

Ca(OH)2 (aq) + MgCl2 (aq) + Mg(OH)2 (s) + CaCl2 (aq)

The magnesium hydroxide is then filtered off and roasted.

Which of the following comparisons between calcium and magnesium explains why magnesium hydroxide forms?

NTS 2013
Chemistry
Periodicity in Elements
Elimination Tool:

Which process is used to produce volatile compounds?

From the following, only one amino acid has two identical groups attached to its central atom. Which amino acid out of the following matches the description given above.

NUMS Mock 3
Chemistry
Chemistry of Life

Starting point of Kelvin scale is:

NUMS 2020
Chemistry
Thermochemistry
Elimination Tool:

A liquid has mass m and specific heat capacity c. The rate of change in temperature of the liquid is R. What is the rate at which heat is transferred from the liquid.

PMC Practice 2
Physics
States of Matter – Gases, Liquids and Solids
Elimination Tool:

The influence of temperature on reaction rate is predicted by:

NUMS Mock 1
Chemistry
Reaction Kinetics

________ are prepared by passing hydrogen gas over hot alkali metals or alkaline earth metals?

NTS 2015 SMBBMC
Chemistry
s and p Block Elements
Elimination Tool:

Paraldehyde is formed by:

When the number of moles of reactants and products are equal in reversible reactions which parameter would not affect at equilibrium?

NUMS 2020
Chemistry
Chemical Equilibrium
Elimination Tool:

Physical and chemical properties of an element depend upon

Lowering of vapor pressure is directly proportional to?