Which of the following statements is incorrect about benzene?

Pick correct pair about the difference between E1 and E2 mechanism of methyl bromide forming an alkene.

NUMS 2019 Cancelled
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The order of force of repulsion between lone pairs and Bond pairs is?

NTS 2015 SMBBMC
Chemistry
Chemical Bonding
Elimination Tool:

Maleic Acid and Fumaric Acid are:

NUMS Mock 3
Chemistry
Fundamental Principles of Organic Chemistry

Which of the following elements of Group 3 is non-metallic in character?

Transition Elements usually show:

NUMS 2015
Chemistry
d and f Block Elements
Elimination Tool:

Electronic configuration of K is:

NUMS 2014
Chemistry
Atomic Structure
Elimination Tool:

Which statement about the following equilibrium is correct?

2SO2 (g) + O2(g) ⇌ 2SO3(g) ΔH= – 395 KJ/ mole

NTS 2019
Chemistry
Chemical Equilibrium
Elimination Tool:

Which of following Is poison for catalyst:

Which of the following catalysts is used in the decomposition of laughing gas N2O at 1000 K?

2N2O 2N2 + O2

NTS 2016 SMBBMC
Chemistry
Periodicity in Elements
Elimination Tool:

Group 1A and 11A are known as: ) s block elements d) P block elements

Earth’s crust Is Included In which sphere?

The oxidation state of Cl in HClO4 is:

NTS 2019
Chemistry
Solution and Colloids
Elimination Tool:

In which of the following C-C bond length is the minimum?

) Nylon 6 —6 Is obtained by heating adipic acid with:

Colloidal particles can be separated by using:

ETEA 2017
Chemistry
Solution and Colloids
Elimination Tool:

Why is it necessary to distill aldehyde formed from oxidation of primary alcohol through acidified potassium dichromate (VI) solution or acidified sodium dichromate (VI) solution?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Aldehydes and Ketones
Elimination Tool:

Transfer of heat from hot surroundings to a cold refrigerator is an example of:

NUMS Mock 4
Chemistry
Thermochemistry

The color of transition metal complexes is due to transition of electrons between:

NUMS 2019 Reconduct
Chemistry
d and f Block Elements
Elimination Tool:

Which type of hybridization takes place in benzene?

Which of the following does not act as ligand in the formation of complexes?

NUMS 2019 Reconduct
Chemistry
d and f Block Elements
Elimination Tool:

Crystal structure of diamond is

CFCs are organic compounds, that are derivatives of saturated hydrocarbons. They have high bond dissociation values therefore they are inert and non-toxic for living organisms.

The word CFCs stands for:

UHS 2019
Chemistry
Environmental Chemistry
Elimination Tool:

For, the reaction:

N2 + 3H2 ⇌ 2NH3

The production of NH3 will be favored at:

NTS 2010
Chemistry
Chemical Equilibrium
Elimination Tool:

Which one of them is used as an automobile antifreeze

PMC Sample 1
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Which of the following is the most environmentally-friendly source to derive energy?

UHS 2017 Reconduct
Chemistry
Environmental Chemistry
Elimination Tool:

Which of the following does not show variable valency?

NUMS Mock 3
Chemistry
Atomic Structure

Color of Epsom salt Is

The reaction 2CO + O2 -> 2CO2 proceeds slower because activation energy is:

NTS 2018
Chemistry
Thermochemistry
Elimination Tool:

78 g of a hydrocarbon occupies 22.414 ml of volume at S.T.P. The empirical formula of the hydrocarbon is CH. The molecular formula of this hydrocarbon is:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Stoichiometry
Analytical Chemistry
Elimination Tool:

is the process of transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

The oxidation state of carbon in C2O42- is:

NUMS 2019 Reconduct
Chemistry
Electrochemistry
Elimination Tool:

The amount (in liters) of Oxygen at STP that is required for the combustion of 4gm of ethylene is :

NUMS Mock 2
Chemistry
Stoichiometry

What is a complex/coordination compound?

PMC Sample 1
Chemistry
Periodicity in Elements
Elimination Tool:

Phenol is reduced to benzene on reaction with:

The carbonates of alkali metals are soluble in water except:

NUMS Mock 3
Chemistry
s and p Block Elements

The coal used for domestic purposes is: –

London forces are present in

PMC Sample 1
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Part of a polymer molecule has the following structure. -CH2 -CH2 -CH2 -CH2 -CH2 -CH2-

NUMS 2016
Chemistry
Macromolecules
Elimination Tool:

Loose electrons present in outer shell meansv

The flame colour of Ca in flame test is:

NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:

The lower part of the “Solvay tower” has been cooled during the manufacture of soda ash because:

NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:

The nature of Binding Force in Ionic Crystals is

PMC Sample 1
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

The stability of ionic crystal depends principally on:

NTS 2014
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

“The sum of all the exponents to which the molar concentration in terms in the rate equation are raised” defines:

NUMS Mock 2
Chemistry
Reaction Kinetics

An SN2 reaction at an asymmetric carbon of a compound always gives:

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

During a chemical reaction, heat of Formation Is:

Which of the following intermediate has the complete octet around the carbon atom.

NUMS 2018
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

What is formed by a series of complex reactions of ozone with water in the troposphere that are driven by sunlight?

NUMS 2019 Cancelled
Chemistry
Environmental Chemistry
Elimination Tool:

How many atmospheres correspond to 1050 torr?

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

The electrophilic reactions of Benzene are:

PreMedPK MDCAT Mock 2
Chemistry
Hydrocarbons
Elimination Tool:

The smog having high contents of SO2 is called:

NUMS 2019 Reconduct
Chemistry
Macromolecules
Elimination Tool:

High molecular mass organic compounds, upon hydrolysis yield amino acids are called _______.

PMC Sample 3
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

Silicon is found in nature in form of:

NUMS 2014
Chemistry
Chemical Bonding
Elimination Tool:

Covalent hydrides are:

How many chain isomers are shown by C5H12?

PreMedPK MDCAT Mock 4
Chemistry
Hydrocarbons
Elimination Tool:

Gasoline is a mixture of?

NUMS 2018
Chemistry
Hydrocarbons
Elimination Tool:

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

Reaction by Grignard reagent are mostly

In which of the following the oxidation state of S is the highest

Which of the following is a water cleaning halogen?

AgCI is in water.

Caster kellners cell evaporated has replaced __________ because the Caster Kellner process evaporates__________?

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

P.E of an electron in the orbit of an atom Is

How many types of polymerization reactions are there?

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

Ionic, covalent and co-ordinate covalent bonds are simultaneously present in the molecular geometry of:

NTS 2017
Chemistry
Chemical Bonding
Elimination Tool:

According to Charles Law, when temperature is reduced to half the volume will be

1500•degree Celsius furnace temperature Is maintained at which zone?

Oxides of xenon are formed from:

Which of the following is the chemical formula of a compound indicating the relative number of atoms in the simplest ratio?

NTS 2016 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

The unit ___ is commonly used by meteorologists

PMC Sample 3
Chemistry
Environmental Chemistry
Elimination Tool:

R-X on reaction with alcohols form:

PMC 2020
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The reaction in which a molecule is broken down by Water is known as

When two moles of H2 and one mole of O2 react to form H2O, 484 KJ heat is evolved. What is Δ Hf for one mole of H2O?

NUMS 2019 Reconduct
Chemistry
Thermochemistry
Elimination Tool:

Which of the following transition metals in its ground state have unpaired electrons in an s-orbital?

NUMS 2015
Chemistry
d and f Block Elements
Elimination Tool:

Which of the following statements is incorrect about amorphous solids?

PMC Practice 3
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Which of the following has maximum Hydration power?

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

Which of the following reagent is required for preparation of acyl chloride (CH3COCl) from ethanoic aicd?

UHS 2019
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

Oxidation Number of all the elements in the free state is?

PMC Practice 5
Chemistry
d and f Block Elements
Elimination Tool:

Grignard reagent when added to dry ice gives:

A certain radioactive isotope has a half-life of 50 days. Fraction of the material left behind after 100 days will be:

NUMS Mock 2
Chemistry
Analytical Chemistry

If any amino acids contain greater number of NH2, it is:

NUMS 2019 Cancelled
Chemistry
Alkyl Halides and Amines
Elimination Tool:

How many moles of S02 contain 16 grams of oxygen?

Elevation of the boiling point is a ____ property.

PMC 2021 Tested
Chemistry
Solution and Colloids
Elimination Tool:

For the reaction, A(g) -> products:

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

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

When an element exists in more than one crystalline form, the phenomenon is termed as:

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

Which of the following elements has the highest boiling point?

NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:

Point out the property which is not characteristic of alkali metal:

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

Which one of the following has the highest lattice energy?

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

The mass number of an atom is:

PMC 2021 Tested
Chemistry
Fundamental Principles of Organic Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

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:

Magnesium oxide is used in:

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