Who started the development of the First Periodic Table?

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

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

UHS 2016
Chemistry
Environmental Chemistry
Elimination Tool:

Which of the following is not a property of liquids:

In alkanes, each carbon has hybridization:

PMC 2020
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Maximum number of electrons in a subshell is given by:

NUMS Mock 1
Chemistry
Atomic Structure

Q.1 Suppression of ionization means

Sigma bond is formed by:

NTS 2010
Chemistry
Chemical Bonding
Elimination Tool:

Bleaching powder is agent?

Which of following has “higher boiling”and “melting point”?

PreMedPK MDCAT Mock 5
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Ligands having two lone pair of electrons for donation to the central transition metal ion are known as:

UHS 2018
Chemistry
d and f Block Elements
Elimination Tool:

Which of the following statements is incorrect about benzene?

Q.83 Alcohol oxidation gives carboxylic acid through

Ionization energy depends upon:

Ozone concentration is measured in:

UHS 2016
Chemistry
Environmental Chemistry
Elimination Tool:

Acetone and Chloroform are soluble into each other due to:

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

Which of the following values of heat of formation indicates that the product is least stable?

NTS 2017
Chemistry
Thermochemistry
Elimination Tool:

A compound has an empirical (simple) formula, C2H2O. If the experimental molecular weight is found to be in the range 160-170, the molecular formula of this compound is:

(Atomic weight: C = 12.1, H = 1.008, O = 16).

PMC Practice 21
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

How are carboxylic acids formed from alcohol?

PMC Practice 1
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Which of the following has maximum Ionization energy?

Magnesium oxide is used in:

NTS 2015 DUHS and JSMU
Chemistry
s and p Block Elements
Elimination Tool:

The osmotic pressure of equimolar solutions of BaCl2, NaCl and sucrose will be in the order:

NUMS 2016
Chemistry
Solution and Colloids
Elimination Tool:

Which one of the following pollutants can cause death of a person by binding with
haemoglobin of red blood cells?

UHS 2014
Chemistry
Environmental Chemistry
Elimination Tool:

Which metal is used to form alkanes from alkyl halides?

Formaldehyde is Industrially Prepared from: 

A solution of Sodium Sulphate was electrolyzed using platinum electrode, the products at the anode and cathode respectively are:

NUMS 2017
Chemistry
Electrochemistry
Elimination Tool:

H —CHO is:

“The sum of all the exponents to which the molar concentration in terms in the rate equation are raised” defines:

NUMS Mock 2
Chemistry
Reaction Kinetics

Catalytic hydrogenation of alkenes exhibits:

NUMS Mock 2
Chemistry
Hydrocarbons

What should be added to methane to produce HCN?

If 18.0 g of glucose is dissolved in 1 kg of water, boiling point of this solution should be:

UHS 2013
Chemistry
Solution and Colloids
Elimination Tool:

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

When alpha particles are bombarded on beryllium

According to the general gas equation, density of an ideal gas depends upon:

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

The atomic number Z of an atom represents the:

NTS 2018
Physics
Atomic Structure
Elimination Tool:

Only two elements are present in:

NTS 2011
Chemistry
s and p Block Elements
Elimination Tool:

1500•degree Celsius furnace temperature Is maintained at which zone?

Which of the following molecules has no net dipole moment?

NUMS 2014
Chemistry
Chemical Bonding
Elimination Tool:

The compression factor (compressibility factor) for one mole of a Van der Waals gas at 0 and 100 atmosphere pressure is found to be 0.5. Assuming that the volume of gas molecule is negligible, calculate the Van der Waals constant ‘a’.

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

What is the color of the precipitate when Brady’s reagent is used to test a benzaldehyde?

NUMS 2019 Cancelled
Chemistry
Aldehydes and Ketones
Elimination Tool:

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

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

Alkenes undergo:

UHS 2019
Chemistry
Hydrocarbons
Elimination Tool:

Which of the following oxides is amphoteric in character?

NUMS 2014
Chemistry
Acids, Bases and Salts
Elimination Tool:

Which of following pair has highest conductivity?

Free Nitrogen and Oxygen are present in atmosphere but they do not react with each other under normal conditions because:

UHS 2019
Chemistry
Environmental Chemistry
Elimination Tool:

Gases can be converted into liquid by:

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:

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 of the following statements is true?

NUMS 2014
Chemistry
s and p Block Elements
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:

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:

If the value of ‘Kc’ is very large then, it shows that ______ completed.

NUMS 2018
Chemistry
Chemical Equilibrium
Elimination Tool:

Sodium Is prepared by

Polymers are made up of:

PMC 2021 Tested
Chemistry
Macromolecules
Elimination Tool:

d subshell has

Generic formula of cycloalkane is:

PMC 2020
Chemistry
Hydrocarbons
Elimination Tool:

Who rejected vital force theory

PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:

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

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

Percentage of nitrogen by volume in air is:

UHS 2018
Chemistry
Environmental Chemistry
Elimination Tool:

How many Dewar Structure of Benzene are present?

Nylon-6,6 is also called:

UHS 2018
Chemistry
Macromolecules
Elimination Tool:

Thermochemistry is very important to learn about

PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:

Carboxylic acids can be reduced to corresponding alcohols. Which of the following reagent can be used for this purpose?

NUMS Mock 2
Chemistry
Carboxylic Acids and its Derivatives

Which of the following can he used as a source of energy

Which of the following has the maximum specific heat?

Histidine acts as _____ in nature?

NUMS 2019 Cancelled
Chemistry
Alkyl Halides and Amines
Elimination Tool:

All of the following react with KMnO4 except

NUMS Mock 2
Chemistry
Hydrocarbons

If NaCl produced in the equation:

FeCl3+ NaOH → Fe(OH)3 + NaCl

175.5 g of NaCl was dissolved in water to make a liter of solution, the molarity would be:

NTS 2010
Chemistry
Solution and Colloids
Elimination Tool:

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

NTS 2016 SMBBMC
Chemistry
Atomic Structure
Elimination Tool:

What Is Lindlar Catalyst?

X is a salt that decomposes in water.

What is the reason for its decomposition?
e-+ X3+→ X2+ Ecell= 1.91 V

NUMS 2018
Chemistry
Electrochemistry
Elimination Tool:

Which of the following has greatest electronegativity?

What substrates are required to add a NO2 group to benzene?

NTS 2013
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The influence of temperature on reaction rate is predicted by:

NUMS 2019 Reconduct
Chemistry
Reaction Kinetics
Elimination Tool:

Which of the following is not a macronutrient?

The boiling point of water is higher than other hydrides because water molecules can form:

NTS 2018
Chemistry
Chemical Bonding
Elimination Tool:

Paraldehyde is formed by:

Cyanohydrins when reacted with mineral acid produces ________?

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

An ionic compound is most likely to be formed when:

NUMS 2015
Chemistry
Chemical Bonding
Elimination Tool:

The rate constant of a first-order reaction is 3 x 10-6 per second.

If the initial concentration is 0.10 M, the initial rate of reaction is:

NUMS 2018
Chemistry
Reaction Kinetics
Elimination Tool:

Caster kellners cell evaporated has replaced __________ because the Caster Kellner process evaporates__________?

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

The change in concentration of reactant or product per unit time is called:

NTS 2016 DUHS & JSMU
Chemistry
Chemical Equilibrium
Elimination Tool:

Hydrolysis of acyl chloride results in the formation of:

PMC 2020
Chemistry
Carboxylic Acids and its Derivatives
Elimination Tool:

X-ray work in 20th century shows that diameter of the atoms are of the order?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

The maximum number of electrons in an atom with n=3 and l=2 is:

NUMS 2015
Chemistry
Atomic Structure
Elimination Tool:

The difference between soft and hard X-rays is of:

NUMS 2016
Physics
Atomic Structure
Elimination Tool:

At Equilibrium, which of the following reactions is not affected by pressure?

NUMS Mock 3
Chemistry
Chemical Equilibrium

The substance for the separation of isotopes is firstly converted into the

UHS 2016
Chemistry
Environmental Chemistry
Elimination Tool:

Which of the following is most soluble in water?

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

What is the order of the following reaction:

2NO +O2 -> 2NO2

NTS 2019
Chemistry
Reaction Kinetics
Elimination Tool:

Scandium, Sc, is the first of the 3d blocks of elements in the Periodic table.

Which properties of Sc approve the above fact?

NUMS 2019 Cancelled
Chemistry
d and f Block Elements
Elimination Tool:

Which one of the following is saturated hydrocarbon?

In a zero-order reaction, the rate is independent of:

NTS 2019
Chemistry
Reaction Kinetics
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

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

Ionization potential

Number of transitions possible for an electron in the 6th shell are