What is the measure of activation energy in an endothermic reaction?

UHS 2019
Chemistry
Thermochemistry
Elimination Tool:

The expression PV = nRT represents the:

NUMS 2020
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

In the NaCl crystal, chloride ions present at the face center are distributed in:

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

Which of the following statements is true?

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

Which type of isomerism depends on the distribution of carbon atoms on each side of the functional group?

NTS 2013
Chemistry
Hydrocarbons
Elimination Tool:

The formula of washing soda is:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool:

Methyl alcohol is used for production of

A solution has pH of 10. What is the value of [OH-]?

Covalent bond is stronger than hydrogen bond by:

Which is the metal, whose elevated concentration is harmful to fish as it clogs the gills thus causing suffocation?

UHS 2012
Chemistry
Environmental Chemistry
Elimination Tool:

Which of the following is a balanced redox equation?

NUMS 2020
Chemistry
Electrochemistry
Elimination Tool:

which of the following can not be used to convert butanoic acid to butanoyl chloride?

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

Metaboric acid when heated produces:

NTS 2016 DUHS & JSMU
Chemistry
Acids, Bases and Salts
Elimination Tool:

) Aluminium is agent?

The structure of cyclohexane is:

PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:

Which among the following gives ppt. with terminal alkynyl hydrogen?

PreMedPK MDCAT Mock 4
Hydrocarbons
Elimination Tool:

How many chain isomers are shown by C5H12?

NTS 2018
Chemistry
Hydrocarbons
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:

What is the least number of carbon atoms in amino acids?

The coal used for domestic purposes is: –

Impurities of lead in silver are removed by:

NUMS Mock 2
Chemistry
d and f Block Elements

Which one of the following is NOT a nucleophile?

NTS 2019
Chemistry
Alkyl Halides and Amines
Elimination Tool:

How many chain isomers of Pentane is possible?

PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:

Which of the following is not a nucleophile?

NTS 2010
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A student mixed ethyl alcohol with a small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?

PreMedPK MDCAT Mock 3
Chemistry
Aldehydes and Ketones
Elimination Tool:

For a single step reaction A ->B + 2C, the rate law is:

NUMS Mock 3
Chemistry
Reaction Kinetics

SN2 can be best carried out with:

NUMS 2015
Chemistry
Alkyl Halides and Amines
Elimination Tool:

NaNO3 on heating gives:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool:

The reaction: Cl2 + H2O→ HCl + HOCl is an example of:

NUMS Mock 4
Chemistry
Electrochemistry

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

NUMS Mock 3
Chemistry
Acids, Bases and Salts

Measuring ‘Biochemical Oxygen Demand’ (ROD) is a method used for:

Which one of the following is used as an anesthetic?

To conduct electricity through Ionic Solids, the ions should be:

PMC Practice 5
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A solution having pH = 0 is

An example of a solution not in equilibrium is:

NTS 2016 DUHS & JSMU
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Na, Ca & Mg are

Water boils when:

Number of molecules in 1 dm3 of water will be almost

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

If 9.8 g of sulfuric acid is dissolved in an excess quantity of water, it will yield _______ moles of hydrogen ion ( H+) and _______ mole of sulphate ions (SO4 -2).

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The unhybridized p orbitals of benzene are present in the form of _________.

PMC Practice 2
Chemistry
Hydrocarbons
Elimination Tool:

Smallest element in the periodic table is?

Bleaching powder is agent?

Pierrie Curie and Marie Curie isolated which radioactive element?

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

The unit cell parameters of the monoclinic system are:

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

Aerobic decomposition of organic matter i.e. glucose by bacteria in water sediments produces

UHS 2013
Chemistry
Environmental Chemistry
Elimination Tool:

While calculating vapor pressure of a liquid in manometer, the column of mercury facing the vapors of a liquid is _____ due to pressure on surface of liquid in flask.

PMC Practice 1
Chemistry
Experimental Techniques in Chemistry
Elimination Tool:

The solubility product for BaSO4 , at 18-25°C is:

NTS 2015 DUHS and JSMU
Chemistry
Solution and Colloids
Elimination Tool:

What are the products of destructive distillation of coal?

PMC Practice 1
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:

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:

For a chemical reaction A + B, the threshold energy of the reaction is 31 KJ/mole. The average internal energy of A is 12 KJ/mole. What will be the activation energy of A?

NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:

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

NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:

Which of the following is not a derivative of benzene?

PMC Practice 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Which of the following are the fundamental ways of transferring energy?

NUMS 2014
Chemistry
Thermochemistry
Elimination Tool:

Harmful and undesirable reaction of a metal when exposed to the atmosphere or any chemical agent is known as:

NTS 2010
Chemistry
Macromolecules
Elimination Tool:

Which of the following has the maximum number of unpaired d electrons?

NTS 2016 DUHS & JSMU
Chemistry
d and f Block Elements
Elimination Tool:

The formula of cryolite is

The amount of energy associated with quantum of radiation is directly proportional to:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

The reaction CHCH + H2O + 3(O) shows the formation of ________.

NUMS 2018
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

Cl + e —-> Cl-

ΔH = -348kJ/mol

The value -348KJ/mol in this case will be:

NTS 2012
Chemistry
Thermochemistry
Elimination Tool:

Which compound shows maximum hydrogen bonding with water?

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

For which one of the following gaseous equilibrium will an increase in pressure increase the yield of the product:

NTS 2014
Chemistry
Chemical Equilibrium
Elimination Tool:

Paramagnetism is due to:

A liquid crystalline state exists between two temperatures i.e melting temperature and ____ temperature.

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

In mass spectrometry, ionization occurs in form.

Rayon is ____?

PMC Practice 10
Chemistry
Industrial Chemistry
Elimination Tool:

Actual yield is always experimental yield.

Which of following has “higher boiling”and “melting point”?

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

The valency of an atom will be one if there is a sufficient gap between first and second ____.

NUMS Mock 1
Chemistry
Chemical Bonding

While finding the relative atomic mass, which of the following standard is used to compare the atomic mass of chlorine (35.5 amu)

NUMS Mock 1
Chemistry
Stoichiometry

Which type of reaction takes place when a carbonyl compound is treated with a mixture of NaCN and an acid?

NUMS Mock 3
Chemistry
Aldehydes and Ketones

Ease of esterification of the following alcohols CH3CH2OH(I),(CH3​)2CHOH and (CH3)3COH(III) with HCOOH is:

NUMS 2017
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

A diabetic person’s exhaled breath contains propanone. A student tries to test the diabetes by asking the person to bubble the reagent with his exhaled breath. Which of the following reagents would give a positive result?

PreMedPK MDCAT Mock 5
Chemistry
Aldehydes and Ketones
Elimination Tool:

CO2 and SO2 both are tri-atomic molecules but heat of vaporization of SO2 is greater than that of CO2 due to:

PMC 2020
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Which one of the following polymer is called as Nylon 6,6?

UHS 2016
Chemistry
Industrial Chemistry
Elimination Tool:

What is the volume in cm3 of 3.01 x 10^23 molecules of O2 gas at S.T.P.?

NTS 2017
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

How many chain isomers can be obtained from the alkane C6H14?

NTS 2016 DUHS & JSMU
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Which of following transition complex will have most stable square planar structure?

Heat of vaporization of water is kcal/kg

273 mL of a gas at STP was taken to 27oC and 600 mm pressure. The final volume of the gas would be:

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

Hydrolysis of Nitriles produces:

NUMS 2020
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

An essential condition for the Optical Activity of an organic compound is:

NUMS 2015
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

If energy of the activated complex is close to energy of reactants, it means that the reaction is:

NUMS 2019 Reconduct
Chemistry
Reaction Kinetics
Elimination Tool:

Molecular substances differ from ionic substances in:

27 g of Al will react with how much mass of O2 to produce Al2O3?

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Organic compounds in which tetravalency of carbon atom is satisfied are called as ____ ?

PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:

If during crystallization more solute could not be dissolved in the solution, the solution is:

Reaction of water with quicklime results in the rise in the temperature of the system. Using the concept of an energy change, indicates the nature of the reaction?

NUMS Mock 1
Chemistry
Thermochemistry