If we are given the mass of a substance ,we can calculate the_______ of the other substance with the help of a balanced chemical equation.

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

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

NTS 2014
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Chemical formula of MaIonic Acid is?

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

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

Q.34 Which of these have a positive value of enthalpy?

The following changes to the system at equilibrium have no effect on Kc except:

NUMS 2017
Chemistry
Chemical Equilibrium
Elimination Tool:

Ketones can be made by oxidation of:

NUMS Mock 2
Chemistry
Aldehydes and Ketones

Mass spectrometer is used to determine which of the following quantity?

Isomerism due to shifting of proton from one atom to another in a same molecule is known as:

NUMS 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Ethylene is a monomer of polyethylene that is widely used as raw material for manufacturing plastics. It can be polymerized into two different classes: HDPE and LDPE. The following choices are the differences of HDPE and LDPE except:

NUMS 2019 Cancelled
Chemistry
Macromolecules
Elimination Tool:

The carbonates of alkali metals are soluble in water except:

NUMS Mock 3
Chemistry
s and p Block Elements

If during crystallization more solute could not be dissolved in the solution, the solution is:

Which of the following reagent is required for preparation of acyl chloride (CH3COCl) from ethanoic aicd?

UHS 2019
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

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

PMC Sample 2
Chemistry
Chemical Equilibrium
Elimination Tool:

An essential condition for the Optical Activity of an organic compound is:

NUMS 2015
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

One Calorie is equivalent to:

NTS 2019
Chemistry
Thermochemistry
Elimination Tool:

Definition of electrode potential is?

Polyester is used in:

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

Half atmospheric pressure is:

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

The periodic table consists of:

NUMS 2014
Chemistry
Periodicity in Elements
Elimination Tool:

When two moles of H2 and one mole of O2 react to form H2O, 484 KJ heat is evolved. What is Δ Hf for one mole of H2O?

NUMS 2019 Reconduct
Chemistry
Thermochemistry
Elimination Tool:

Second Ionization energy of M atom

Which of the following is secondary pollutant?

NUMS 2019 Reconduct
Chemistry
Environmental Chemistry
Elimination Tool:

IUPAC name of propionaldehyde is:

What is the chemical formula for plaster of Paris?

NTS 2010
Chemistry
s and p Block Elements
Elimination Tool:

For the following exothermic reaction, a decrease in temperature will shift the equilibrium towards: 2NO (g) + O2(g) -> 2NO2 (g)

NTS 2018
Chemistry
Chemical Equilibrium
Elimination Tool:

Monomers of Nylon 6,6 Is/are:

Grignard’s reagent on hydrolysis give

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:

Ionic radius in period from left to right:

NUMS 2014
Chemistry
Periodicity in Elements
Elimination Tool:

For the reaction, A(g) -> products:

When the concentration of A(g) doubles, the rate of reaction increases four folds, which means it is:

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

What is the catalyst used in the Haber process?

H₂ + N₂ ⟶ NH₃

PMC 2021 Tested
Chemistry
Industrial Chemistry
Elimination Tool:

Which of the following has the highest value of pKa?

NUMS Mock 1
Chemistry
Chemical Equilibrium

In HF the covalent bond is due to:

NTS 2016 SMBBMC
Chemistry
Chemical Bonding
Elimination Tool:

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

NTS 2013
Chemistry
Solution and Colloids
Elimination Tool:

Bond energy between nitrogen atoms in N2 molecule is:

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

How many chain isomers are possible for the alkane C6H14?

NTS 2016 SMBBMC
Chemistry
Hydrocarbons
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:

Percentage of nitrogen by volume in air is:

UHS 2018
Chemistry
Environmental Chemistry
Elimination Tool:

In a vessel, 10 g N2, 10 g H2 and 10g O2 are present. Which one will have least number of atoms?

PMC 2020
Chemistry
Stoichiometry
Elimination Tool:

) Nylon 6 —6 Is obtained by heating adipic acid with:

A catalyst catalyzes reaction by:

sp3 hybridization in CH4 gives it ______ geometry.

NTS 2012
Chemistry
Chemical Bonding
Elimination Tool:

The yellowish-brown color in photochemical smog is due to the presence of:

UHS 2013
Chemistry
Environmental Chemistry
Elimination Tool:

Which one has fruity smell?

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:

Which one of the following molecules has sp3 hybridization?

NUMS Mock 2
Chemistry
Chemical Bonding

The reaction between borohydride

What is the chief ore of fluorine?

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

NUMS 2017
Chemistry
Environmental Chemistry
Elimination Tool:

Meta-formaldehyde molecule has Oxygen MOMS:

Nitric oxide has how many valence electrons?

NUMS Mock 1
Chemistry
Atomic Structure

Which of the following is not an aromatic compound)

In which of the following reaction does the C-O bond of alcohol not break?

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

Oxidation number of Cr in K2Cr2O2 & K2Cr2O4 is:

Methyl ketones can be characterized by performing:

NUMS 2018
Chemistry
Aldehydes and Ketones
Elimination Tool:

1.8 x 10 -5 is the dissociation constant of:

NTS 2016 SMBBMC
Chemistry
Chemical Equilibrium
Elimination Tool:

When animals inhale air, oxygen will move into the lungs due to difference in partial pressure of oxygen in lungs and atmosphere. This obeys

PMC Sample 1
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Formula of Thionyl chloride is

The active part in organic molecules is called:

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

The sugar unit in DNA molecule is:

NUMS 2019 Reconduct
Chemistry
Macromolecules
Elimination Tool:

Which of these in an aqueous solution of equal concentration has the lowest pH?

NUMS 2019 Cancelled
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

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

UHS 2017 Reconduct
Chemistry
Environmental Chemistry
Elimination Tool:

Formaldehyde is Industrially Prepared from: 

Genetic mutations occur in:

NUMS 2016
Chemistry
Chemistry of Life
Elimination Tool:

The mass of proton is ______ times heavier than ______.

NUMS Mock 4
Chemistry
Atomic Structure

When was electron discovered?

Chromium dissolves in dilute H2SO4 for [Cr(H2O)6]2. The colour of the ion is:

NUMS 2016
Chemistry
d and f Block Elements
Elimination Tool:

Carboxylic acids do not give the characteristics reaction of >C=O group because of:

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

The chemical formula of chromyl chloride gas is?

NTS 2016 SMBBMC
Chemistry
Periodicity in Elements
Elimination Tool:

Grignard reagent when added to dry ice gives:

At the end of the periodic table _____ are found.

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

Which pair has species with different shapes?

NTS 2016 SMBBMC
Chemistry
Chemical Bonding
Elimination Tool:

The first ionization energy is maximum for:

PMC 2020
Chemistry
Chemical Bonding
Elimination Tool:

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:

The same carboxylic acid is obtained either by hydrolysis of a nitrite X or by oxidation of alcohol Y. Which pair could be X and Y? X Y

Which one of the following alkaline earth metal carbonates is thermally the most stable?

NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:

Alcbhols react with aqueous acid to produce alkyl halides in presence of

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

NUMS 2019 Reconduct
Chemistry
Reaction Kinetics
Elimination Tool:

Which statement is correct?

PMC Sample 3
Chemistry
Solution and Colloids
Elimination Tool:

Which of the following has the highest value of electronegativity?

PMC 2020
Chemistry
s and p Block Elements
Chemical Bonding
Elimination Tool:

The reaction of benzene with bromine gives?

If we take some water at 0oC and start heating it,we find that in the temperature range 0oC to 4oC:

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

Either Is dangerous In which of the following states?

273 mL of a gas at STP was taken to 27oC and 600 mm pressure. The final volume of the gas would be:

PMC Practice 2
Chemistry
States of Matter – Gases, Liquids and Solids
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:

Purification of table salt (NaCl) by passing HCl gas through its saturated aqueous solution is an example of:

PMC 2020
Chemistry
Chemical Equilibrium
Elimination Tool:

Phenylmethyl ketone can be converted into ethyl benzene in one step by using:

NUMS 2016
Chemistry
Aldehydes and Ketones
Elimination Tool:

Reaction of water with quicklime results in the rise in the temperature of the system. Using the concept of an energy change, indicates the nature of the reaction?

NUMS Mock 1
Chemistry
Thermochemistry

Nitrogen and phosphorus have 3 of their valence electrons unpaired because of:

NTS 2014
Chemistry
Atomic Structure
Elimination Tool:

All of the following react with KMnO4 except

NUMS Mock 2
Chemistry
Hydrocarbons

Actual yield is always less than theoretical yield due to

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which of the following is NOT a “raw material” used in the Solvay process?

NTS 2016 SMBBMC
Chemistry
Macromolecules
Elimination Tool:

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

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