Which gas among the following can be dried by bubbling in H2S04?

2 moles of octane ( C8H18) burn with 25 moles of oxygen (02) and produced __ moles of carbon dioxide along with 18 moles of water.

PMC Practice 20
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

……is a technique to separate impurities from chemical products:

NUMS 2014
Chemistry
Macromolecules
Elimination Tool:

Which of the following hybrid orbitals has maximum “s” character?

PMC 2020
Chemistry
Chemical Bonding
Elimination Tool:

Unpaired electron trend of transition elements:

PMC 2021 Tested
Chemistry
d and f Block Elements
Elimination Tool:

Mass of a neutron in amu is?

Transfer of heat from hot surroundings to a cold refrigerator is an example of:

NUMS Mock 4
Chemistry
Thermochemistry

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

NUMS 2019 Cancelled
Chemistry
Periodicity in Elements
Elimination Tool:

Ethers are very good:

The reaction between borohydride

Identify from the following the example in which the complex is an anion:

NTS 2016 SMBBMC
Chemistry
d and f Block Elements
Elimination Tool:

Which of the following is the correct order of electronegativity (from highest to lowest)?

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

Which of the following will not undergo aldol condensation?

PreMedPK MDCAT Mock 3
Chemistry
Aldehydes and Ketones
Elimination Tool:

When Grignard reagent react with water they give as a product

Structure of ice is similar to which of the following?

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

Adipic acid and Hexamethylene dlamine combine to form?

Work done on the system is

PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:

The major source of unburnt hydrocarbons in the atmosphere is / are:

NUMS Mock 1
Chemistry
Hydrocarbons

Which of the following catalysts is used in the decomposition of laughing gas N2O at 1000 K?

2N2O 2N2 + O2

NTS 2016 SMBBMC
Chemistry
Periodicity in Elements
Elimination Tool:

For a multi-electron atom, the highest energy level among the following is:

NTS 2013
Chemistry
Atomic Structure
Elimination Tool:

Which of the following orbital will be filled first than 4p?

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

Which one of the following has the highest lattice energy?

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

Diethyl ether and n-butanol are:

NUMS 2019 Reconduct
Chemistry
Fundamental Principles of Organic Chemistry
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:

Many elements have fractional atomic masses. This is because:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

The alcohols in which the carbon which is attach to the OH group is further attach with two carbon atoms is called as?

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

An ionic compound is most likely to be formed when:

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

Hybridization in diamond is

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

Only two elements are present in:

NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:

Periodic table is divided into groups A and 6:

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

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
Elimination Tool:

Which one substance is used to remove both H2S and carbon dioxide from biogas?

Which of the following is not an isomer of other three:

if the crystal structure of Graphite is Hexagonal, the crystal system of Diamond will be:

Alkyl Halides that go through SN1 reactions are

An ionic compound is most likely to be formed when:

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

Methane gas is also known as

PMC Sample 2
Chemistry
Hydrocarbons
Elimination Tool:

By heating 25g of limestone (CaCO3) , the weight of carbon dioxide produced is

NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:

Which one of the following is used as an anesthetic?

Which of the following contains the coordinate covalent bond?

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

How many bonds are there in CO?

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 statements is true?

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

How many chain isomers are shown by C5H12?

PreMedPK MDCAT Mock 4
Chemistry
Hydrocarbons
Elimination Tool:

Which of the following is not an interstitial compound?

NTS 2014
Chemistry
d and f Block Elements
Elimination Tool:

Aromatic compounds burn with a sooty flame because:

NUMS Mock 3
Chemistry
Fundamental Principles of Organic Chemistry

Impurities of lead in silver are removed by:

NUMS 2016
Chemistry
d and f Block Elements
Elimination Tool:

Percentage of Chlorine present In bleaching powder Is:

Vapor pressure of a liquid depends upon

In the reaction;

H2 + CO2 H2O + CO

The decrease in the concentration of reactants and products cause the equilibrium to shift:

NUMS 2020
Chemistry
Chemical Equilibrium
Elimination Tool:

1 mole of N2O4 (g) was placed in an empty 1 dm^3 container and allowed to reach equilibrium according to the following equation:

N2O4(g) 2NO2(g)

At equilibrium, x mole Of N2O4 (g) had dissociated. What is the value of the equilibrium constant, Kc, at the temperature of the Experiment?

NTS 2016 SMBBMC
Chemistry
Chemical Equilibrium
Elimination Tool:

A correct formula must:

NTS 2017
Chemistry
Chemical Equilibrium
Elimination Tool:

A child’s balloon has a volume 3.80 dm3, when the temperature is 35°C. If the balloon is put in a refrigerator and cooled to 5°c, the approximate volume of the balloon is (assume pressure inside the balloon is equal to atmospheric pressure):

NTS 2011
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

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

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

In the production of wrought iron Mg, Si, and P are removed in the form of:

PMC Practice 3
Chemistry
Industrial Chemistry
Elimination Tool:

Which of the following can be oxidized to an aldehyde?

NUMS 2019 Cancelled
Chemistry
Aldehydes and Ketones
Elimination Tool:

Which one of the following Is a vulcanizing agent?

Free radical reactions take place in the presence of ______?

PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:

As the concentration of reactant increases, the rate of reaction also increases, it is because:

NUMS 2018
Chemistry
Reaction Kinetics
Elimination Tool:

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

NUMS 2019 Reconduct
Chemistry
Hydrocarbons
Elimination Tool:

The bond angle of NF3 is:

H2 and Cl2 do not react in the dark, but in the presence of light a vigorous reaction is initiated due to the formation of:

NUMS 2016
Chemistry
Hydrocarbons
Elimination Tool:

The lightest positive rays obtained is from:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

If the matter in a given system at a given condition is divided into two equal parts, then the value of the extensive properties will become:

NTS 2011
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

What is the % relative humidity at 25 C and 0.01876 atm if the vapor pressure of water is 23.76 mm Hg.

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

Paramagnetic elements contain:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

78 g of a hydrocarbon occupies 22.414 ml of volume at S.T.P. The empirical formula of the hydrocarbon is CH. The molecular formula of this hydrocarbon is:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Stoichiometry
Analytical Chemistry
Elimination Tool:

An ionic compound is most likely to be formed when:

NUMS Mock 1
Chemistry
Chemical Bonding

Mass of electron in a.m.u is:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

Formula of hydrogen peroxide

Chloro-fluoro carbons cause

Color of Epsom salt Is

A mole of a substance contains _____ particles.

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

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

UHS 2017 Reconduct
Chemistry
Environmental Chemistry
Elimination Tool:

Which statement is true about electron affinity?

NUMS 2020
Chemistry
Periodicity in Elements
Chemical Bonding
Elimination Tool:

The hybridization of benzene is:

Gasoline is a mixture of?

NUMS 2018
Chemistry
Hydrocarbons
Elimination Tool:

Actual yield is always experimental yield.

Which type of hybridization takes place in benzene?

At the transition temperature of a crystalline solid, the substance exists:

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

The smallest number of molecules are present in?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Statement of Graham’s Law is

Which of the following gas is more ideal at STP?

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

Purification of bauxite whose major impurity Is silica (SiO2) is carried out through:

NTS 2010
Chemistry
Macromolecules
Elimination Tool:

Hydration energy increases with

Proton transfer within a molecule is known as:

Stability of benzene is due to

Chemical properties of an atom depends upon number of

Which of the following acids is used for Etching glass?

NTS 2011
Chemistry
Acids, Bases and Salts
Elimination Tool:

Which alkyl halide has the lowest reactivity for a particular alkyl group?

NTS 2018
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Three different polymers are polymerized to form