When Gypsum is heated to about 100° C, it losses some water of crystallization and becomes:

NTS 2011
Chemistry
States of Matter – Gases, Liquids and Solids
s and p Block Elements
Elimination Tool:

The nitrides of alkaline earth metals hydrolyse with water to form:

NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:

ΔH = ΔE + PΔV is the change in enthalpy at constant ________.

NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:

If 9.8 g of sulfuric acid is dissolved in excess quantity of water, it will yield ____ moles of hydrogen ion (H+) and _____ moles of sulphate ions (SO42-).

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

) Aluminium is agent?

How many chain isomers are possible for the alkane C6H14?

NTS 2016 SMBBMC
Chemistry
Hydrocarbons
Elimination Tool:

The gas which is mainly produced in landfills from the waste is:

UHS 2016
Chemistry
Environmental Chemistry
Elimination Tool:

Alkoxicies react with alkyl halide to form? a

Starting point of Kelvin scale is:

NUMS 2020
Chemistry
Thermochemistry
Elimination Tool:

Which of the following compounds is formed when sodium burns in excess of air?

NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:

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

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

Acetylene on reacting with ammonium silver nitrate gives.

NUMS 2014
Chemistry
Hydrocarbons
Elimination Tool:

2 gasses at SIP, with equal volume and equal pressure will have same a

Which statement is true about electron affinity?

NUMS 2020
Chemistry
Periodicity in Elements
Chemical Bonding
Elimination Tool:

The unit ___ is commonly used by meteorologists

PMC Sample 3
Chemistry
Environmental Chemistry
Elimination Tool:

The reaction 2RX + 2Na -> RR + 2NaX is an example of:

NUMS 2017
Chemistry
Alkyl Halides and Amines
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:

Equilibrium constant has no units if?

In an adiabatic process:

NUMS 2016
Chemistry
Thermochemistry
Elimination Tool:

The molecular formula expresses?

NTS 2015 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

Which of the following compound has the highest boiling point?

A single Chloride free radical can destroy ozone molecules up to:

NUMS Mock 1
Chemistry
Enviormental Chemistry

Which of the following statements is NOT true for the first law of thermodynamics?

NTS 2014
Chemistry
Thermochemistry
Elimination Tool:

Select the organic compound which belongs to Arene family:

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

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

NUMS Mock 1
Chemistry
Environmental Chemistry

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:

In which of the following reagent Cupric citrate complex is formed?

PreMedPK MDCAT Mock 5
Chemistry
Aldehydes and Ketones
Elimination Tool:

A chemical engineer wants to use the Haber process in order to produce ammonia as raw material for fertilizers. Which of the following parameters must the chemical engineer AVOID in order to obtain the maximum yield of ammonia?
N2(g) + 3H2(g) -> 2NH3(g) ΔH0 = -92.6 kJ/mol

NUMS 2019 Cancelled
Chemistry
Chemical Equilibrium
Elimination Tool:

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

Which of following Is poison for catalyst:

Second Ionization energy of M atom

Which of the following is most soluble in water?

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

________ are prepared by passing hydrogen gas over hot alkali metals or alkaline earth metals?

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

Which one the following can act as nucleophile?

Impurities of lead in silver are removed by:

NUMS Mock 2
Chemistry
d and f Block Elements

Oxidation state of P in Mg2P3O5 Is

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

NTS 2018
Chemistry
Thermochemistry
Elimination Tool:

Percentage of Chlorine present In bleaching powder Is:

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

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

An ionic compound is most likely to be formed when:

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

Magnesium oxide is used in the making of the lining of blast furnaces. It is extracted from seawater as follows. Aqueous calcium hydroxide is added to seawater.

Ca(OH)2 (aq) + MgCl2 (aq) + Mg(OH)2 (s) + CaCl2 (aq)

The magnesium hydroxide is then filtered off and roasted.

Which of the following comparisons between calcium and magnesium explains why magnesium hydroxide forms?

NTS 2013
Chemistry
Periodicity in Elements
Elimination Tool:

Which of the following has the highest value of pKa?

NUMS Mock 1
Chemistry
Chemical Equilibrium

Which of the following is constant during an isothermal process?

Which theory deals with hybridization of orbitals?

Which of the following has the strongest bond?

NUMS 2019 Cancelled
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The chemical analysis of a compound having molecular mass 188 gives, C=12.8%, H=2.1% and Br=85.1%. Its molecular formula is:

NTS 2014
Chemistry
Stoichiometry
Elimination Tool:

Percentage of nitrogen by volume in air is:

UHS 2018
Chemistry
Environmental Chemistry
Elimination Tool:

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

UHS 2019
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Which one of the following elements has six valence electrons?

H2S is an example of ______ hydride.

NTS 2012
Chemistry
Chemical Bonding
Elimination Tool:

Silicon is found in nature in form of:

NUMS 2014
Chemistry
Chemical Bonding
Elimination Tool:

The order of reactivities of the following alkyl halides for an SN2 reaction is:

NUMS 2016
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The correct electronic configuration of Cr is:

PMC Practice 4
Chemistry
d and f Block Elements
Elimination Tool:

Example of metamerism is:

Chlorine upon reaction in cold NaOH yields:

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

Which of the following elements has the highest boiling point?

NTS 2014
Chemistry
s and p Block Elements
Elimination Tool:

Loose electrons present in outer shell meansv

Thermochemistry is very important to learn about

PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:

At the end of the periodic table _____ are found.

NTS 2016 DUHS & JSMU
Chemistry
Periodicity in Elements
Elimination Tool:

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 type of carboxylic acid is produced from the hydrolysis of nitriles?

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

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:

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

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

Order of reactivity of halogens towards alkanes is:

NUMS 2019 Reconduct
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Only those substances are written in Ion Electron Method:

PMC Sample 1
Chemistry
Electrochemistry
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:

A solution having pH = 0 is

The enthalpy change of the reaction

H2(g) + ½ O2 -> H2O (l)

under standard conditions is:

NUMS 2017
Chemistry
Thermochemistry
Elimination Tool:

Which of the following is not a property of liquid?

What volume in dm3 of KCl is obtained in the following equation if the volume of KCIO3 at the beginning of the reaction is 20 dm3?

2KClO3 -> 2KCl + 3O2

NTS 2016 DUHS & JSMU
Chemistry
Stoichiometry
Elimination Tool:

Which of the following solids is an example of a substance with a macromolecular structure?

NUMS 2016
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

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:

What assumptions are made in the Kinetic Theory about an ideal gas?

There are no forces of attraction between molecules
the molecules are in a state of continuous random motion
the size of the molecule is negligible
NTS 2015 SMBBMC
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Triads were introduced by

Fuels with higher octane number can be produced by ___________.

PMC Practice 2
Chemistry
Hydrocarbons
Elimination Tool:

The formula which shows the simplest whole number ratio for the atoms of different elements in a compound is:

NUMS Mock 1
Chemistry
Stoichiometry

Sodium Is prepared by

Which of the following gas, when ignited, burns with a blue flame and is not very soluble in water?

NUMS Mock 4
Chemistry
s and p Block Elements
Environmental Chemistry

Which of the following has less amount of protein a

Which one of the following is the structure of Teflon?

UHS 2018
Chemistry
Alkyl Halides and Amines
Macromolecules
Elimination Tool:

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

Which of the following is not an aromatic compound)

ransition elements are colored because of:

Tertiary alkyl  hallides follow which of the following mechanism when attacked by a Nucleophile?

The smallest number of molecules are present in?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Sodium reacts with water more vigorously than lithium because it:

NTS 2010
Chemistry
s and p Block Elements
Elimination Tool:

How will the equilibrium of the following reaction be affected if additional nitrogen is added?

N2(g) + 3H2(g)⇌ 2NH3(g)

NTS 2015 DUHS and JSMU
Chemistry
Chemical Equilibrium
Elimination Tool:

By increasing which of the following factor polarizability increases?

PMC Practice 1
Chemistry
Periodicity in Elements
Elimination Tool:

Aromatic compounds burn with a sooty flame because:

NUMS Mock 3
Chemistry
Fundamental Principles of Organic Chemistry