Butanone on oxidation with K2Cr2O7 / H2SO4 forms:

NUMS 2020
Chemistry
Aldehydes and Ketones
Elimination Tool:

Sigma bond is formed by:

NTS 2010
Chemistry
Chemical Bonding
Elimination Tool:

For a reaction 2A + 3B -> C
The rate law expression is given by rate = K [A]1[B]2. The order of the reaction with respect to A, B and overall order of reaction are:

NUMS 2015
Chemistry
Reaction Kinetics
Elimination Tool:

Solution contains 85.5 g of sucrose (C12H22O11) in 250 cm3. What is its molarity?

UHS 2019
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Pressure remaining constant, at which temperature volume of gas will become twice to the volume at 0 C?

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

Which of the following is an assumption of the kinetic model of an ideal gas?

PMC Practice 6
Physics
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Which carbohydrate Is soluble in water?

The following changes to the system at equilibrium have no effect on Kc except:

NUMS 2017
Chemistry
Chemical Equilibrium
Elimination Tool:

Which of the following statement about Avogadro’s hypothesis is correct?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Aromatic compounds burn with a sooty flame because:

NUMS Mock 3
Chemistry
Fundamental Principles of Organic Chemistry

Which is the correct electronic configuration of Chromium (24Cr)?

NUMS Mock 2
Chemistry
d and f Block Elements

The lightest positive rays obtained is from:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

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

NUMS Mock 3
Chemistry
Reaction Kinetics

Hydrolysis of acyl chloride results in the formation of:

PMC 2020
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

The classification of monohydric alcohols is due to

PMC Sample 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

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

NUMS Mock 3
Chemistry
Alcohols, Phenols and Ethers

The _____ study of composition of pure substance in 17th century clearly shows that few elements are components of many substances

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

If an electron of hydrogen atom jumps from 5th orbit to 7’h orbit, its atomic radius increases

Polymer having a characteristics odour and mostly used as an adhesive material is

Which type of hybridization takes place in benzene?

In Cannizzaro’s reaction, Benzyl alcohol is obtained from?

PreMedPK MDCAT Mock 4
Chemistry
Alcohols, Phenols and Ethers
Aldehydes and Ketones
Elimination Tool:

In a reversible reaction, catalyst lowers the action energy of the:

NUMS 2020
Chemistry
Reaction Kinetics
Chemical Equilibrium
Elimination Tool:

The radiations from a naturally occurring radioactive substance, as seen after deflection by a magnetic field in one direction, are:

NUMS Mock 2
Chemistry
Analytical Chemistry

Bacteria plays an important role in:

PMC 2021 Tested
Chemistry
Environmental Chemistry
Elimination Tool:

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

NUMS 2018
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Formula of hydrogen peroxide

Which one has valency other than one?

106 gram of Na2CO3 per dm3 of the solution of Na2CO3 in water, the concentration of the solution will be:

NTS 2018
Chemistry
Stoichiometry
Elimination Tool:

Dehydration of ethanol at 100 oC in the presence of concentrated H2SO4 gives:

NUMS 2019 Reconduct
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Which of the following has maximum Hydration power?

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

In which of the following reaction alkyl ketones are converted Into carboxylic acid with one carbon atom less than the parent compound?

Which of the following carboxylic acids is used in medicine as a local irritant?

PMC Practice 2
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

If we balanced the following reaction , what is the net ionic charge on the right side of the equation?

__H+ +___ MnO4- + ____ Fe2+ →___ Mn2+ + ___ Fe3+ + ___ H2O

NUMS Mock 4
Chemistry
Electrochemistry

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

NUMS 2017
Chemistry
Environmental Chemistry
Elimination Tool:

A sample of gas weighs 1.25 g, at 28 C occupying a volume of 2.50 x 10-2 ml and its pressure is 715 torr. What is the molar mass in grams?

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

Definition of electrode potential is?

The transition elements belongs to Group VI B are

PMC Practice 6
Chemistry
d and f Block Elements
Elimination Tool:

Conversion of Electrical energy into chemical energy is

PMC Sample 1
Chemistry
Electrochemistry
Elimination Tool:

The process of depositing a thin layer of expensive metals on ordinary or expensive metals is called:

NUMS 2017
Chemistry
Electrochemistry
Elimination Tool:

Which ion will have a maximum value of the heat of hydration?

PMC Practice 1
Chemistry
Thermochemistry
Elimination Tool:

The chemical reaction in which reactions require high amount of activation energy are generally:

NTS 2014
Chemistry
Reaction Kinetics
Elimination Tool:

Which of the following esters give a Jasmine Flavour?

PreMedPK MDCAT Mock 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Ethylamine can be prepared by the action of bromine and caustic potash on:

NUMS 2017
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Which of the following compounds has the empirical formula, (CH2O) and reacts with sodium hydroxide?

NUMS 2019 Cancelled
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Strongest acid among the following is:

NUMS 2014
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

Some substances lack definite heats of fusion. These substances are:

NUMS 2020
Chemistry
Thermochemistry
Elimination Tool:

Which of the following gas is more ideal at STP?

NUMS 2015
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Which of the following pairs of gases have same rate of diffusion:

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

Change in Pressure will only affect the substances which are in:

PMC Practice 4
Chemistry
Experimental Techniques in Chemistry
Elimination Tool:

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

An ideal solvent dissolves maximum solute at?

Glucose(C6H12O6) is the most important nutrient in a cell for generating chemical potential energy, what is the mass percent of carbon in 1.5g of sample?

PMC Practice 24
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

H2SO4 is used in industries of?

Variable valency is generally exhibited by:

NUMS 2014
Chemistry
d and f Block Elements
Elimination Tool:

H2O has a higher boiling point than HF because:

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

Which of the following does not show variable valency?

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

Paramagnetism is due to:

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:

Triads were introduced by

Phenylmethyl ketone can be converted into ethyl benzene in one step by using:

NUMS Mock 1
Chemistry
Aldehydes and Ketones

Q.125 Standard electrode Potential is denoted by

If we are given the mass of a substance ,we can calculate the_______ of the other substance with the help of a balanced chemical equation.

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Precipitation occurs when the product of ionic concentrations is:

NUMS 2019 Reconduct
Chemistry
Chemical Equilibrium
Elimination Tool:

Which of the following is an insecticide?

PreMedPK MDCAT Mock 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Which of the following is not a primary pollutant of the troposphere?

NUMS 2019 Cancelled
Chemistry
Environmental Chemistry
Elimination Tool:

Which of these in an aqueous solution of equal concentration has the lowest pH?

NUMS 2019 Cancelled
Chemistry
Carboxylic Acids and its Derivatives
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:

Limiting reactant controls the amount of _.

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Effusion of gases take place through a hole with:

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

Who introduced the concept of macromolecules?

PMC Practice 7
Chemistry
Macromolecules
Elimination Tool:

What type of chemical reaction is this?
CH3CHO + NH3 -> CH3CH(OH)NH2

NUMS Mock 3
Chemistry
Aldehydes and Ketones

Which one of the following is not a heterocyclic compound?

PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:

The increasing number of CFC production for industrial use has been a major contributor to the depletion of ozone molecules in the stratosphere. When CFCs diffuses slowly to the atmosphere in the presence of UV light between 175 nm to 220 nm, the ozone layer decomposes. If 1 mole of CFCl3 (Freon – 110) has been released into the air, how many moles of oxygen is produced from the photodecomposition of ozone?

NUMS 2019 Cancelled
Chemistry
Environmental Chemistry
Elimination Tool:

Q.1 Suppression of ionization means

Elevation of the boiling point is a ____ property.

PMC 2021 Tested
Chemistry
Solution and Colloids
Elimination Tool:

Which of the following can be oxidized to an aldehyde?

NUMS 2019 Cancelled
Chemistry
Aldehydes and Ketones
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

CH3CN + NCI > A + B in presence of water in the above reaction A and B are

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

NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:

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:

Proton transfer within a molecule is known as:

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:

What is the heat of vaporization of radon?

Amino acid is usually known by a

Linear combination of atomic orbitals (LCAO) results in the formation of:

NUMS Mock 2
Chemistry
Chemical Bonding

Percentage of Chlorine present In bleaching powder Is:

Buffer capacity depends upon

Paramagnetic elements contain:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

Ammonium nitrate contain nitrogen