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

NUMS 2018
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Ethanol, when reacted with PCI5 , gave A, POCl3, and HCI. A reacts with AgNO2 to form B and AgCl. A and B are respectively:

NTS 2014
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Silicon is found in nature in form of:

NUMS 2014
Chemistry
Chemical Bonding
Elimination Tool:

Chemical formula of Malonic acid: b) CEI-11206
a) C3H804

The compound ‘leaf alcohol’ is partly responsible for the smell of new – mown grass

CH3CH2CH=CHCH2CH2OH

Leaf alcohol

Which two compounds will be formed when ‘leaf alcohol’ is oxidized using hot, concentrated manganate (VII) ions?

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

Solubility of carboxylic acids in water decrease with

Which among the following gives ppt. with terminal alkynyl hydrogen?

PreMedPK MDCAT Mock 4
Hydrocarbons
Elimination Tool:

Which class of the compounds is represented by the type formula ROR?

NUMS 2017
Chemistry
Aldehydes and Ketones
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:

In a reaction:

A+B 2C

When equilibrium was attained, the concentration was

[A] = [B] = 4 moles/dm3

[C]= 6 moles/dm3
The equilibrium constant Kc of this reaction is:

NTS 2011
Chemistry
Chemical Equilibrium
Elimination Tool:

Which element of 5th group doesn’t have unpaired valence electrons in d-sub shell?

Maleic Acid and Fumaric Acid are:

NUMS 2017
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

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:

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

NTS 2016 DUHS & JSMU
Chemistry
d and f Block Elements
Elimination Tool:

The periodic table consists of:

NUMS 2014
Chemistry
Periodicity in Elements
Elimination Tool:

Both a and c What is the oxidation number of S in SO2^(-2)?

Both ionic and covalent bonds are present in:

NUMS Mock 3
Chemistry
Chemical Bonding

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

PMC Sample 1
Chemistry
Chemical Equilibrium
Elimination Tool:

Salts of weak bases react with strong acids to give a/an

NUMS Mock 1
Chemistry
Acids, Bases and Salts

Color of Epsom salt Is

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 will not undergo aldol condensation?

PreMedPK MDCAT Mock 3
Chemistry
Aldehydes and Ketones
Elimination Tool:

Meta-formaldehyde molecule has Oxygen MOMS:

According to Charles Law, when temperature is reduced to half the volume will be

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

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

Alkyl halides involving -C-X bond breakage and -C-Nu bond formation simultaneously would follow the mechanism:

PMC 2020
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The atomic mass, molecular mass, ionic mass or formula mass of a substance expressed in grams is called:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The unpolluted natural rainwater is slightly acidic due to the reaction of rain water with:

UHS 2011
Chemistry
Environmental Chemistry
Elimination Tool:

The rate of a gaseous reaction Is given by K [A] [B]. If the volume of the vessel containing these gases is reduced to 1/4th of the initial volume, the rate of reaction relative to the original rate would be:

NUMS 2016
Chemistry
Reaction Kinetics
Elimination Tool:

How many grams of micronutrients are needed by 1 acre of land?

Choose the correct statement:

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

The substance which conducts electricity by the movement of ions:

NUMS 2014
Chemistry
Chemical Bonding
Elimination Tool:

Magnesiums keep on burning in:

NUMS 2014
Chemistry
s and p Block Elements
Elimination Tool:

Higher Transition elements are:

The number of bond(s) between carbon and nitrogen atoms in a Nitrile is:

NTS 2018
Chemistry
Chemical Bonding
Elimination Tool:

Catenation is a process in which carbon shows the properties of:

NTS 2010
Chemistry
Hydrocarbons
Elimination Tool:

Which of the following are not usually named using IUPAC system?

An element has configuration 2, 8, 1. It belongs to, ______.

NTS 2016 SMBBMC
Chemistry
Atomic Structure
Elimination Tool:

If Kc = 1, then reaction is:

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

NUMS 2017
Chemistry
Reaction Kinetics
Elimination Tool:

Nylon-6,6 is also called:

UHS 2018
Chemistry
Macromolecules
Elimination Tool:

The enthalpy change accompanying the gain of an electron by a neutral gaseous atom to form a negative ion is called:

NTS 2010
Chemistry
Thermochemistry
Elimination Tool:

Which one of the following is saturated hydrocarbon?

HCOOH is the structure of:

NUMS 2018
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

Which of the following concentration unit is temperature dependent

ETEA 2019
Chemistry
Solution and Colloids
Elimination Tool:

Which of the following is the percentage of the original quantity of a radioactive material left after five half-lives approximately.

NUMS Mock 4
Physics
Nuclear Physics

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

NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:

Which of the following is true about SN2 reactions:

Au3+ has __________ configuration.

PMC Practice 5
Chemistry
d and f Block Elements
Elimination Tool:

Physical properties of Ethyne is/are:

PreMedPK MDCAT Mock 3
Chemistry
Hydrocarbons
Elimination Tool:

Q.1 Suppression of ionization means

A diabetic person’s exhaled breath contains propanone. A student tries to test the diabetes by asking the person to bubble the reagent with his exhaled breath. Which of the following reagents would give a positive result?

NUMS 2019 Cancelled
Chemistry
Aldehydes and Ketones
Elimination Tool:

An example of a solution not in equilibrium is:

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

In the addition of sodium bisulfite to carbonyl system, which of the following is a nucleophile?

PreMedPK MDCAT Mock 3
Chemistry
Aldehydes and Ketones
Elimination Tool:

Lysine is a
amino acid

With which of the following alcohols do not react to form alkyl halides?

Rectified spirits have a percentage of alcohol.

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Enzymes speed up the reaction upto:

PMC Practice 3
Chemistry
Macromolecules
Elimination Tool:

Solid CO2 dry ice has a structure just like:

NUMS Mock 4
Chemistry
States of Matter – Gases, Liquids and Solids

27 g of Al will react with how much mass of O2 to produce Al2O3?

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

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

NTS 2017
Chemistry
Solution and Colloids
Elimination Tool:

Chemical equations do not tell about the ______ because of certain limitations.

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:

Molal freezing point constant of water is:

UHS 2013
Chemistry
Solution and Colloids
Elimination Tool:

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

NUMS Mock 1
Chemistry
Environmental Chemistry

Chemical formula of powder used in carom board is?

Ionic radius in period from left to right:

NUMS 2014
Chemistry
Periodicity in Elements
Elimination Tool:

Atoms in solids are

PMC Sample 3
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

To conduct electricity through Ionic Solids, the ions should be:

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

The efficiency of chemical reaction can be expressed as:

PMC 2020
Chemistry
Stoichiometry
Elimination Tool:

Thermochemistry is very important to learn about

PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:

If we take 2.2 grams of CO2, 6.02 x 1021atoms of nitrogen. and 0.03-gram atoms of sulfur, then the molar ratio of C, N, and atoms will be:

NTS 2013
Chemistry
Stoichiometry
Elimination Tool:

Which of the following is a result of reaction between Iodine and Oxygen?

P.E of an electron in the orbit of an atom Is

“Zymase”- a group of 14 enzymes, used in the fermentation of starch, is present in:

NTS 2010
Chemistry
Chemistry of Life
Elimination Tool:

The stability of ionic crystal depends principally on:

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

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

CFCs are organic compounds, that are derivatives of saturated hydrocarbons. They have high bond dissociation values therefore they are inert and non-toxic for living organisms.

The word CFCs stands for:

UHS 2019
Chemistry
Environmental Chemistry
Elimination Tool:

The number of amino acids found in proteins that a human body can synthesize is:

NUMS Mock 1
Chemistry
Macromolecules

The process of bringing an element in use after its complete half-life is:

P2O5 is Hygroscopic powder which sublimes at:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool:

The smallest number of molecules are present in?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Rayon is ____?

PMC Practice 10
Chemistry
Industrial Chemistry
Elimination Tool:

) Which one of the following has no isotope

A 4s orbital has:

NUMS 2014
Chemistry
Atomic Structure
Elimination Tool:

Sulfur with HI acts as a:

Within each pair of elements F & Cl, S & Se, and Li & Na respectively, the elements that release more energy upon an electron gain are:

PMC Sample 3
Chemistry
Periodicity in Elements
Elimination Tool:

Benzene in the presence of AlCl3 produces acetophenone when reacts with:

PreMedPK MDCAT Mock 4
Chemistry
Hydrocarbons
Elimination Tool:

The only o, p−directing group which is deactivating in nature is:

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Which one is the carbonyl protecting group?

How many types of polymerization reactions are there?

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

The value of surface tension of isopropyl alcohol is?

NUMS Mock 2
Chemistry
Chemical Bonding

Le-Chatelier Principle is about

PMC Sample 3
Chemistry
Chemical Equilibrium
Elimination Tool:

How many orbitals intermix in sp hybridization?

Aerobic decomposition of organic matter i.e. glucose by bacteria in water sediments produces

UHS 2013
Chemistry
Environmental Chemistry
Elimination Tool:

Burning of which one of the following waste is considered as useful industrial fuel or to produce electricity

UHS 2015
Chemistry
Industrial Chemistry
Elimination Tool: