Which of the following element is not usually present in all proteins?

PMC Practice 3
Chemistry
Macromolecules
Elimination Tool:

Le-Chatelier Principle is about

PMC Sample 3
Chemistry
Chemical Equilibrium
Elimination Tool:

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

H —CHO is:

The order of reactivities of the following alkyl halides for an SN2 reaction is:

NUMS 2016
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Aqueous solutions of Iodine and Sodium hydroxide were mixed in a round bottom flask at 70 C. Following chemical reaction was carried out.

3I2 + 6 NaOH -> NaIO3 + NaI + H2O
This reaction is termed as;

UHS 2019
Chemistry
Solution and Colloids
Elimination Tool:

Formaldehyde is Industrially Prepared from: 

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

NUMS Mock 4
Chemistry
Thermochemistry

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

Sodium reacts with water more vigorously than lithium because it:

NTS 2010
Chemistry
s and p Block Elements
Elimination Tool:

The decreasing order of second ionization energy of K, Ca, Ba is:

NUMS Mock 1
Chemistry
Chemical Bonding

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:

Ca(OH)2 is sparingly soluble having solubility value 6.5 x 10-6. What’ll be its solubility:

UHS 2017 Reconduct
Chemistry
Solution and Colloids
Elimination Tool:

Primary Alcohol is produced by reactions of Grignard’s reagent with _________ followed by hydrolysis in an acidic medium.

NTS 2011
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

In chemistry the work is generally ___.

PMC Sample 1
Chemistry
Thermochemistry
Elimination Tool:

Precipitation occurs when the product of ionic concentrations is:

NUMS 2019 Reconduct
Chemistry
Chemical Equilibrium
Elimination Tool:

Conversion of Electrical energy into chemical energy is

PMC Sample 2
Chemistry
Electrochemistry
Elimination Tool:

Every sp3 orbital is oriented in space In such a way that angle between them is:

Harmful and undesirable reaction of a metal when exposed to the atmosphere or any chemical agent is known as:

NTS 2010
Chemistry
Macromolecules
Elimination Tool:

14) Ethanol and Methanol can be separated by:

A gas that reacts with CaO and not with NaHCO3 is:

NTS 2017
Chemistry
Periodicity in Elements
Elimination Tool:

Electronic configuration of M2+ ion is 2, 8, 14 and its atomic weight is 56 amu. The number of neutrons in its nucleus are:

NTS 2017
Chemistry
Atomic Structure
Elimination Tool:

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

NUMS Mock 3
Chemistry
Chemical Bonding

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

NUMS 2018
Chemistry
Chemical Equilibrium
Elimination Tool:

which of the following can not be used to convert butanoic acid to butanoyl chloride?

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

In a Beta elimination reaction, the nucleophile attacks a\an:

NUMS 2015
Chemistry
Alkyl Halides and Amines
Elimination Tool:

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

NTS 2018
Chemistry
Alkyl Halides and Amines
Elimination Tool:

A bottle of cold drink contains 200 ml liquid in which CO2 is 0.1 molar . Suppose carbon dioxide behaves like an ideal gas the volume of dissolved carbon dioxide at STP is?

NTS 2015 DUHS and JSMU
Chemistry
Stoichiometry
Elimination Tool:

The transition elements belongs to Group VI B are

PMC Practice 6
Chemistry
d and f Block Elements
Elimination Tool:

Which of the following has shortest C – C bond length?

The rate of chemical reaction:

PMC Sample 2
Chemistry
Reaction Kinetics
Elimination Tool:

How many chain isomers can be obtained from the alkane C6H14?

NTS 2016 DUHS & JSMU
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

The radius of the third Bohr orbit is:

NTS 2016 DUHS & JSMU
Chemistry
Atomic Structure
Elimination Tool:

Melting point of Group I-A elements is than Group II-A elements

If the value of Kc is large than the ratio (products)/(reactants), the reaction:

Liquid crystals are used for:

Statement of Graham’s Law is

The actual volume of gas molecules is considered negligible at following pressures:

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

Which of the following has the largest dipole moment?

Oxidation state of P in Mg2P3O5 Is

Value of heat capacity of water is

Down the group acid-base behaviour of metallic oxides of group 2 elements changes to:

NUMS Mock 2
Chemistry
s and p Block Elements

Smallest element in the periodic table is?

Which of the following compound has the highest boiling point?

Which of the following is TRUE regarding Methyl Alcohol?

PreMedPK MDCAT Mock 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Which of the following compounds is solid at room temperature?

NUMS Mock 2
Chemistry
Alcohols, Phenols and Ethers

What is the percentage by mass of Nitrogen in NH4(NO3)?

Impurities of lead in silver are removed by:

NUMS Mock 2
Chemistry
d and f Block Elements

The break down of molecular ions from natural productsgive important information about?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

It is the fact that 22.414 cm3 of any gas has a different masses but the same number of

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
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 is used to make container for nitric acid?

sp3 hybridization in CH4 gives it ______ geometry.

NTS 2012
Chemistry
Chemical Bonding
Elimination Tool:

Name the main product formed as a result of the following reaction

H3C – (CH2)5 – CH3 ————> Product

n-heptane

Conditions: 480 – 550 C, 150 – 399 psi V2O5

NTS 2019
Chemistry
Hydrocarbons
Elimination Tool:

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

NUMS 2019 Reconduct
Chemistry
Reaction Kinetics
Elimination Tool:

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

PMC Practice 3
Chemistry
Carboxylic Acids and its Derivatives
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:

Which of the following is the safest way to dry crystals during crystallization?

The oxidation state of Cl in HClO4 is:

NTS 2019
Chemistry
Solution and Colloids
Elimination Tool:

A crystal system having all sides (a, b and c) unequal and anglesα = β = γ= 90 is:

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

Which one of the organic compounds Is the most reactive?

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:

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

NUMS 2017
Chemistry
Chemical Equilibrium
Elimination Tool:

How many electrons can have the values n=2, l=1, and s=+½ in the configuration 1s2, 2s2, 2p3?

NTS 2015 DUHS and JSMU
Chemistry
Atomic Structure
Elimination Tool:

Which one is not related to evaporation?

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

Proteins are present in

Lattice Energy of ionic compounds are found by

PMC Sample 3
Chemistry
Chemical Bonding
Thermochemistry
Elimination Tool:

Electrons are most loosely bound in which of the following halogen?

Change in extensive property is proportional to the change in ______ of material.

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

If an electron jumps from fourth to first orbit, which of the following series will it show?

ZnH2 is an example of?

NTS 2015 SMBBMC
Chemistry
Periodicity in Elements
Elimination Tool:

A system at equilibrium can be disturbed by:

NTS 2013
Chemistry
Chemical Equilibrium
Elimination Tool:

C6H5 Is:

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:

Which enthalpy change is relevant in the following process

Na(s) -> Na (g) ΔH = +107

UHS 2019
Chemistry
Thermochemistry
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:

Percentage of butane in Sui gas is?

NTS 2015 SMBBMC
Biology
Hydrocarbons
Elimination Tool:

In depression of freezing point, freezing constant Is divided by

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?

NUMS Mock 2
Chemistry
d and f Block Elements

Which element among the following forms a protective oxide coating on exposure to air?

Number of elements in 6th period is:

Polymerization of ethene produces which of the following polymers?

PMC Practice 3
Chemistry
Macromolecules
Elimination Tool:

Human blood maintains its pH between

UHS 2016
Chemistry
Solution and Colloids
Elimination Tool:

H2O has a higher boiling point than HF because:

NTS 2015 DUHS and JSMU
Chemistry
Chemical Bonding
Elimination Tool:

1 amu is?

In alkanes, each carbon has hybridization

NUMS Mock 4
Chemistry
Fundamental Principles of Organic Chemistry

“In an atom no two electrons can have the some set of four Quantum numbers” is stated by:

NTS 2013
Chemistry
Atomic Structure
Elimination Tool:

Carboxylic acids are formed by the hydrolysis of ________.

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

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

The compounds having -COOH group are called as_______?

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

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

NUMS 2016
Physics
Atomic Structure
Elimination Tool:

NaNO3 on heating gives:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool: