The formula of washing soda is:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool:

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

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

SN2 can be best carried out with:

NUMS 2015
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Aromatic compounds burn with a sooty flame because:

NUMS Mock 3
Chemistry
Fundamental Principles of Organic Chemistry

Which of the following does not give iodoform test?

NUMS 2014
Chemistry
Aldehydes and Ketones
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:

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:

Acetylene with Cl2 gives:

25 to 35 degree centigrade temperature is good for which of the following process?

When CH2 = CH2 reacts with a halogen acid, the product formed is:

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

UHS 2018
Chemistry
d and f Block Elements
Elimination Tool:

An ester is prepared by the reaction of:

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

20 cm3 of a gaseous hydrocarbon was completely burnt in an excess of oxygen 60 cm3 of carbon dioxide and 40 cm3 of water vapours were formed, all volumes being measured at the same temperature and pressure. What is the formula of the hydrocarbon?

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

Diameter of Hydrogen atom is?

In alkyl halide, the halide ion has charge on it when attached to C-atom.

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

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

Which of the following has a lone pair of electrons on the central atom?

The heat of a reaction can be calculated by using:

NTS 2010
Chemistry
Thermochemistry
Elimination Tool:

Which of the following is an organic compound?

Which of the following substances has giant covalent structure?

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

How many chain isomers of Pentane is possible?

PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:

At 1489 mm of Hg, water will boil at:

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

The shape of crystal in which it usually grows is called its _____.

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

Nitric oxide has how many valence electrons?

NUMS Mock 1
Chemistry
Atomic Structure

Electrons are most loosely bound in which of the following halogen?

The amount of solute present in the given amount of solvent is called:

NTS 2017
Chemistry
Solution and Colloids
Elimination Tool:

Copper is a typical transition metal. Its atomic number is 29. In which oxidation state does it have a partially filled orbital in d-subshell?

UHS 2019
Chemistry
d and f Block Elements
Elimination Tool:

Which is the structure of polyvinyl chloride (polychloroethane)?

UHS 2018
Chemistry
Macromolecules
Elimination Tool:

Polymerization is of how many types:

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

Which of the following is a monosaccharide ?

Which of the following will not undergo aldol condensation?

NUMS Mock 2
Chemistry
Aldehydes and Ketones

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:

Mass spectrometer can be used to find:

A mole of a substance contains _____ particles.

PMC Practice 7
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Impurities of lead in silver are removed by:

NUMS Mock 2
Chemistry
d and f Block Elements

cr. be used as a liquid fertilizer?

Among the most common disaccharides, one of the following is present in the milk?

UHS 2014
Chemistry
Industrial Chemistry
Elimination Tool:

Which one of the following is used as an anesthetic?

How many balloons of capacity 0.25dm3 at 1atm pressure can be filled from a hydrogen gas cylinder of 5dm3 capacity at 10 atm?

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

PVC is created from which halogen

Which of the following statements is correct?

NTS 2011
Chemistry
Atomic Structure
Elimination Tool:

The alkenes can be formed by alcohols in the presence of

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

The shielding effect of inner electrons is responsible for:

NUMS Mock 3
Chemistry
Atomic Structure

Standard Electrode Potential is measured at temperature:

The essential property of a fertilizer is that is should be:

NUMS Mock 1
Chemistry
Environmental Chemistry

Hydrides which are prepared by passing hydrogen gas over hot alkali metals or alkaline earth metals are called:

NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:

Borax bead test is used to separate:

Global scale SO2 is produced by

Which halogen is used as a refrigerant?

In the case of HOCH2CH2CH2COOH, from where is numbering started?

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

Down’s cell is used to prepare:

NTS 2019
Chemistry
Periodicity in Elements
Elimination Tool:

When an electrophilic reagent attacks on alcohol, ________.

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

The false statement regarding saline hydrides is:

NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:

What is the percentage by mass of Nitrogen in NH4(NO3)?

Which functional group is not a double bond?

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

Solubility of Borax decahydrate at 100C is

Arrange the following according to increasing ionization energy: Li, Be, Na, Mg

NUMS 2019 Cancelled
Chemistry
Periodicity in Elements
Elimination Tool:

C6H5C≡N and C6H5N≡C exhibits which type of isomerism:

NTS 2015 SMBBMC
Biology
Fundamental Principles of Organic Chemistry
Elimination Tool:

Equal weights of methane and hydrogen are mixed in an empty container at 25°C. The fraction of total pressure exerted by hydrogen is:

NTS 2013
Chemistry
Stoichiometry
Elimination Tool:

Which of the following alcohol does not get oxidized when it reacts with K₂Cr₂O₇/H₂SO₄?

PMC Sample 2
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

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

The radius of the third Bohr orbit is:

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

Which of the following compounds is solid at room temperature?

NUMS Mock 2
Chemistry
Alcohols, Phenols and Ethers

Which of the following Compound is not reduced by NaBH4 ?

PreMedPK MDCAT Mock 1
Chemistry
Aldehydes and Ketones
Elimination Tool:

Ethers are very good:

The Vander Waal’s constant ‘If of a gas Is four times the:

Rate of effusion of a gas depends upon:

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

Hybridization in BeCl2 Is a

Primary, Secondary Tertiary alcohols can be distinguished by Lucas test in which .. appear

Which one of the organic compounds Is the most reactive?

Most abundant salt of sodium in nature is:

NTS 2017
Chemistry
s and p Block Elements
Elimination Tool:

6th period of periodic table contains elements:

The Oxidation state of Alkali metals in any compound is?

PMC Sample 3
Chemistry
Electrochemistry
Elimination Tool:

A reaction with a tendency of occurring in forward and backward direction simultaneously is termed as

PMC Sample 1
Chemistry
Chemical Equilibrium
Elimination Tool:

Which of the following is the most widely used fertilizer in Pakistan? 

Hydrolysis of acyl chloride results in the formation of:

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

The rate of a reaction in general can be increased by all the following factors except:

NUMS 2015
Chemistry
Reaction Kinetics
Elimination Tool:

A solid melts sharply just above 100 degree centigrade. it does not conduct electricity even when molten. It has weak Vander waal’s forces. What is the structure of the solid most likely to be?

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

The unit of rate constant is same as that of rate of reaction in:

NUMS 2019 Reconduct
Chemistry
Reaction Kinetics
Elimination Tool:

Maximum ____ electrons can be placed in one orbital:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

The smog having high contents of SO2 is called:

NUMS 2019 Reconduct
Chemistry
Macromolecules
Elimination Tool:

At 25 C, the equivalent conductance at infinite dilution of HCl solution is 425 ohm 1 cm 2 Equiv 1 while its specific conductance is 3.825 ohm 1 cm 1. If the apparent degree of dissociation is 90%, the normality of the solution is:

NUMS 2016
Chemistry
Solution and Colloids
Elimination Tool:

Which one of the following is the pure carbon compound and used as a reducing agent in industries?

NTS 2018
Chemistry
Macromolecules
Elimination Tool:

The molecular formula expresses?

NTS 2015 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

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

NUMS 2016
Chemistry
Macromolecules
Elimination Tool:

Primary Alcohol is produced by reactions of Grignard’s reagent with _________ followed by hydrolysis in an acidic medium.

NTS 2011
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Transition elements have coloured compounds because:

NTS 2013
Chemistry
Periodicity in Elements
Elimination Tool:

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

UHS 2019
Chemistry
Thermochemistry
Elimination Tool:

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

NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:

Hybridization of carbon in -CHO group is:

NUMS 2019 Reconduct
Chemistry
Aldehydes and Ketones
Elimination Tool:

The stability in the following structure is due to the:

NUMS Mock 4
Chemistry
Chemical Bonding

The formula of Chile Saltpeter is?

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

What is NOT true about K2Cr2O7?

Hydrolysis accompanied by bond cleavage is called