– ROR is the nucleophile of

NTS 2011
Chemistry
Aldehydes and Ketones
Elimination Tool:

11) Hydrogen has properties similar to:

Matter changes from one state to another state on change in ___________.

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

Le Chatelier’s principle explains effect of all of the following except

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:

A sample of 0.7 moles of metal ‘M’ reacts completely with an excess of fluorine to form 45 g of MF2. How many moles of F are present in it?

PMC Practice 17
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which orbitals take part in binding of transition elements

PMC Sample 1
Chemistry
Periodicity in Elements
Elimination Tool:

An ester is prepared by the reaction of:

NTS 2011
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

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:

Chlorofluorocarbons (CFCs) are important compounds that are used as refrigerants but these are also responsible for Ozone layer depletion. If a Chlorofluorocarbon CFCl3 is present in stratosphere, which of it’s reaction intermediates are actually responsible for the breakdown of the ozone molecule?

UHS 2019
Chemistry
Environmental Chemistry
Elimination Tool:

Triatomic molecules have following movements:

NUMS 2014
Chemistry
Chemical Bonding
Elimination Tool:

Which of the following is not a part of the human diet?

Maleic Acid and Fumaric Acid are:

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

7′ Period of the Periodic Table is:

1 amu is?

Sodium Is prepared by

How many significant figures are there in 0.4793?

NTS 2018
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

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

How many electrons can have the values n=2, l=1, and s=+½ in the configuration 1s2, 2s2, 2p3?

NTS 2015 DUHS and JSMU
Chemistry
Atomic Structure
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

H2SO4 has great affinity for water because:

NTS 2014
Chemistry
Acids, Bases and Salts
Elimination Tool:

The oxidation potential standard hydrogen electrode is arbitrarily taken as:

NTS 2019
Chemistry
Electrochemistry
Elimination Tool:

Electrical conductivity depends upon _______.

NTS 2016 SMBBMC
Chemistry
Chemical Bonding
Elimination Tool:

By increasing which of the following factor polarizability increases?

PMC Practice 1
Chemistry
Periodicity in Elements
Elimination Tool:

It is the fact that 22.414 cm3 of any gas has a different masses but the same number of

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

Zwitter ion is formed when proton goes from:

NTS 2018
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Reaction by Grignard reagent are mostly

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:

Which of the following is most soluble in water?

PMC Practice 1
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

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

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

Formula of Thionyl chloride is

Stability of benzene is due to

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

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

Which of the following does not have an inert gas configuration?

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

Which of the following reagents will reduce butanoic acid to butanol?

NUMS Mock 1
Chemistry
Carboxylic Acids and its Derivatives

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

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

Heat evolved or absorbed in a chemical reaction does not depend upon?

NTS 2016 SMBBMC
Chemistry
Thermochemistry
Elimination Tool:

The enthalpy change of the reaction

H2(g) + ½ O2 -> H2O (l)

under standard conditions is:

NUMS 2017
Chemistry
Thermochemistry
Elimination Tool:

Chemical formula of MaIonic Acid is?

Consider the following reaction:

R―CHO + 2[Ag(NH3)2]OH → R―COONH4 + 2Ag + 2NH3 + H2O This reaction represents one of the following tests.

PreMedPK MDCAT Mock 1
Chemistry
Aldehydes and Ketones
Elimination Tool:

The colour of transition metal complexes is due to:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

Choose the correct statement:

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

Which of the following is true about SN2 reactions:

Which of the following molecule is expressed in empirical formula:

Water and mercury can be separated by:

The process in which electric current is used to carry out a non-spontaneous redox reaction is called:

NTS 2017
Chemistry
Electrochemistry
Elimination Tool:

The properties of liquid crystals are intermediate b/w crystals and

PMC Sample 3
Chemistry
Solution and Colloids
Elimination Tool:

What is the chemical formula of Epsom Salt?

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

NUMS 2017
Chemistry
Environmental Chemistry
Elimination Tool:

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

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

In Contact Process arsenic impurities act as poison for:

NUMS 2019 Reconduct
Chemistry
Periodicity in Elements
Elimination Tool:

+3 and +5 oxidation states are often shown by:

12% W/W alcohol In water solution contains water:

Whidi group has coinage metals?

Bond energy between nitrogen atoms in N2 molecule is:

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

The necessary condition for Boyle’s law to hold is that the process must be ______.

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

Structure of ammonia is:

Fuels with higher octane number can be produced by ___________.

PMC Practice 2
Chemistry
Hydrocarbons
Elimination Tool:

Which one of the following is an example of covalent solid?

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

NUMS 2019 Cancelled
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Aluminum silicate is used In:

What will be the mass in grams of 12 gram atom of carbon atoms?

Which of the following is TRUE regarding Methyl Alcohol?

NTS 2011
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

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

NUMS Mock 3
Chemistry
Atomic Structure

Why transition metals have strong metallic bonding?

PMC Sample 1
Chemistry
Periodicity in Elements
Elimination Tool:

Benzene when reacted with chlorine in ultraviolet rays produces:

Down the group acid-base behaviour of metallic oxides of group 2 elements changes to:

NUMS Mock 2
Chemistry
s and p Block Elements

If products of a reaction act as a catalyst, such process is called:

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The oxidation state of Cl in HClO4 is:

NTS 2019
Chemistry
Solution and Colloids
Elimination Tool:

The expression PV = nRT represents the:

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

Maximum ____ electrons can be placed in one orbital:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

Structure of ice is similar to which of the following?

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

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

NTS 2015 SMBBMC
Chemistry
Chemical Bonding
Elimination Tool:

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

NUMS Mock 1
Chemistry
Solution and Colloids

The mechanism of reaction can be understood by

PMC Practice 6
Chemistry
Experimental Techniques in Chemistry
Elimination Tool:

Color of Epsom salt Is

What is the major reason for S02 emissions?

Urea is the most widely used nitrogen fertilizer in Pakistan. Its composition is:

UHS 2015
Chemistry
Environmental Chemistry
Elimination Tool:

Alkoxicies react with alkyl halide to form? a

Which of the following does not show variable valency?

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

Which element does not show magnetic properties?

The maximum number of electrons that an orbital can accommodate is/are:

NTS 2010
Chemistry
Atomic Structure
Elimination Tool:

Photochemical smog is primarily caused by

ETEA 2019
Chemistry
Environmental Chemistry
Elimination Tool:

From a mixture of CO2and H2gases, CO2can be separated by passing the mixture through:

NTS 2013
Chemistry
Solution and Colloids
Elimination Tool:

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

NUMS Mock 3
Chemistry
Thermochemistry

Ozone Is

On balancing the following chemical equation: K2CrO4, + HCI –> KCI + 2CrCI3 + Cl2 + H2O The co-efficient with HCI will be?

Which is not a meta directing group:

NUMS Mock 1
Chemistry
Fundamental Principles of Organic Chemistry

Which of the following is the highest oxidizing agent?

Which one of the following has the highest lattice energy?

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

Which of the following is not the use of bleaching powder?

NTS 2016 SMBBMC
Chemistry
Periodicity in Elements
Elimination Tool:

Which of the following factor(s) affect a reversible chemical reaction in accordance with the Le – Chatelier Principle?

NUMS 2019 Reconduct
Chemistry
Chemical Equilibrium
Elimination Tool:

The binding energy of transition metal increases upto group:

NUMS 2020
Chemistry
Periodicity in Elements
Elimination Tool: