Chemical formula of powder used in carom board is?

Actual yield is always less than theoretical yield due to

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

In depression of freezing point, freezing constant Is divided by

H2 and O2 are diffusing under the same condition how much H2 gas will diffuse?

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

Standard Electrode Potential is measured at temperature:

The unit used to express the relative atomic mass is called

PMC Practice 4
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Acetylene upon heating at 300 C gives:

The type of isomerism in which the position of functional group changes is called?

Which of the following transition metals has the highest variable oxidation state?

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

Boiling point of C2H5OH is high than phenol because:

Oxidation state of P in Mg2P3O5 Is

The position of the double bond in alkenes can be identified by:

PMC Sample 3
Chemistry
Hydrocarbons
Elimination Tool:

Copper is a typical transition metal. Its atomic number is 29. In which oxidation state does it have a partially filled orbital in d-subshell?

UHS 2019
Chemistry
d and f Block Elements
Elimination Tool:

Which of the following is the reducing agent:

NUMS 2015
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

Higher order alcohols

Which one Is not possible a)

) Which of the following is not a use of acetic acid?

Which one of the following equations correctly defines the enthalpy changes of formation of carbon monoxide:

NUMS 2018
Chemistry
Thermochemistry
Elimination Tool:

The formula of esters is

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

Ethers are very good:

For which of the following order of the reaction, rate of reaction is inversely proportional to the concentration reaction?

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

The correct increasing order of electron affinity value of atoms is:

NUMS Mock 3
Chemistry
Chemical Bonding

The overall positive reduction potential value predicts that process is:

NUMS 2015
Chemistry
Electrochemistry
Elimination Tool:

Impurities of lead in silver are removed by:

NUMS Mock 2
Chemistry
d and f Block Elements

Isotopes are the atoms of same element having different number of _____.

PMC Practice 26
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

To avoid the formation of toxic compounds with chlorine, which substance is used for disinfecting water?

NUMS Mock 1
Chemistry
s and p Block Elements

In the reaction, R-C≡C-R → the reagent used to convert alkyne into trans alkene is:

NTS 2014
Chemistry
Hydrocarbons
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:

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 one of the following is saturated hydrocarbon?

(NI13) is a:

Heat evolved or absorbed in a chemical reaction does not depend upon?

NTS 2016 SMBBMC
Chemistry
Thermochemistry
Elimination Tool:

Variable valency is generally exhibited by:

NUMS 2014
Chemistry
d and f Block Elements
Elimination Tool:

Sum of all the exponents of the molar concentration of the reactant present in the rate equation is known as:

NTS 2012
Chemistry
Reaction Kinetics
Elimination Tool:

If you need to produce carbon dioxide from 12 grams of carbon, how many grams would you need?

Pressure remaining constant, at which temperature volume of gas will become twice to the volume at 0 C?

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

The enthalpy of certain reactions at 273 K is -20.75 kJ. The enthalpy of the same reaction at 373 K (if heat capacities of reactants and products are the same) will be:

NTS 2017
Chemistry
Thermochemistry
Elimination Tool:

Which one is not an organic compound?

NUMS 2014
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

The solubility product of AgCl is 2.0×10-10 mol-2 dm-6. The maximum concentration of Ag+1 ions in the solution is:

NTS 2019
Chemistry
Chemical Equilibrium
Elimination Tool:

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:

Human blood maintains its pH between

UHS 2016
Chemistry
Solution and Colloids
Elimination Tool:

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

UHS 2018
Chemistry
s and p Block Elements
Environmental Chemistry
Elimination Tool:

Exothermic Reactions heat is

PMC Sample 2
Chemistry
Thermochemistry
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:

Ionization energy decreases down the group, from top to bottom, due to:

UHS 2019
Chemistry
Periodicity in Elements
Elimination Tool:

Bleaching powder is agent?

Lithium and beryllium are unique in such a way that they have higher charge densities which produce strong polarizing effects due to:

NTS 2018
Chemistry
Chemical Bonding
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:

Enthalpy of a compound is equal to its

NUMS 2016
Chemistry
Thermochemistry
Elimination Tool:

Oxidation number of particular element can be directly or indirectly inferred from its:

UHS 2019
Chemistry
Electrochemistry
Elimination Tool:

Shape of the orbital occupied by an electron is defined by:

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

Which of the following is the correct equation to calculate relative molecular mass of a gas.

UHS 2018
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

If the ratio of initial concentration of the reagents is greater than the Kc then:

NTS 2011
Chemistry
Chemical Equilibrium
Elimination Tool:

Earth’s crust Is Included In which sphere?

Which of the following is most soluble in water?

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

Phenol reacts with CH3COCl to give:

NUMS 2019 Reconduct
Chemistry
Alcohols, Phenols and Ethers
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 metal is used to form alkanes from alkyl halides?

Which of the following will not undergo aldol condensation?

NUMS 2016
Chemistry
Aldehydes and Ketones
Elimination Tool:

The bond angle of NF3 is:

Carbonyl group undergoes:

NUMS 2019 Reconduct
Chemistry
Aldehydes and Ketones
Elimination Tool:

Which of the pair of gases is not a greenhouse gas?

NUMS 2019 Cancelled
Chemistry
Environmental Chemistry
Elimination Tool:

If concentration time graph of a reactant indicates a constant half life, then the order reaction with respect to that reactant is:

NUMS Mock 4
Chemistry
Reaction Kinetics

The substance which conducts electricity by the movement of ions:

NUMS Mock 3
Chemistry
Chemical Bonding

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

NTS 2019
Chemistry
Reaction Kinetics
Elimination Tool:

The molecular formula expresses?

NTS 2015 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

The electrophilic reactions of Benzene are:

NTS 2011
Chemistry
Hydrocarbons
Elimination Tool:

Ethyl iodide and n-propyl iodide are allowed to undergo Wurtz reaction. The alkane which will not be obtained in this reaction is:

NUMS 2016
Chemistry
Alkyl Halides and Amines
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:

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:

Crystal structure of diamond is

Strongest acid among the following is:

NUMS 2014
Chemistry
Carboxylic Acids and its Derivatives
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:

n-Heptane can be converted into benzene by catalysts:

In Lucas test, tertiary alcohols form oily layer of alkyl halid ___ ?

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

Which of the following is an example of Monocarboxylic acid?

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

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:

________ 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:

For, the reaction:

N2 + 3H2 ⇌ 2NH3

The production of NH3 will be favored at:

NTS 2010
Chemistry
Chemical Equilibrium
Elimination Tool:

Which if the following has the greatest difference between it’s first and second ionization energies?

NUMS 2014
Chemistry
Periodicity in Elements
Elimination Tool:

When Grignard reagent react with water they give as a product

The E.M.F of a Cell is equals to

PMC Sample 1
Chemistry
Electrochemistry
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

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

1 atmospheric pressure is equal to

Which of the following statements is incorrect about amorphous solids?

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

The variation in physical properties of a crystal due to direction is called

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

In 3rd series of transition elements, paramagnetic behaviour is maximum for Mn +2 and :

PMC 2020
Chemistry
d and f Block Elements
Elimination Tool:

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

NUMS Mock 3
Chemistry
s and p Block Elements

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

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

By fermentation process of starch and by the catalytic enzyme, ______ is produced.

NUMS 2018
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Disposable cups are made of a polymer ‘polystyrene’. Polystyrene is:

UHS 2019
Chemistry
Macromolecules
Elimination Tool: