Which of the following indicate the correct variation of electronegativity?

NUMS Mock 1
Chemistry
Chemical Bonding

Half life period of the first order reaction depends upon:

NUMS 2015
Chemistry
Reaction Kinetics
Elimination Tool:

A solid melts sharply just above 100 degree centigrade. it does not conduct electricity even when molten. It has weak Vander waal’s forces. What is the structure of the solid most likely to be?

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

) Which one of the following is metalloid?

Which one of the following Is a vulcanizing agent?

Vithich of the following Alkyl Halide is least reactive?

Variable valency is shown by which of the following elements?

The average atomic mass of Boron is 10.8. It has two isotopes of masses 10 and 11 respectively. What is the percentage of isotope with the average mass of 10?

NUMS Mock 4
Chemistry
Stoichiometry

Left-handed helix in proteins secondary structure is called as ______ :

PMC Practice 4
Chemistry
Macromolecules
Elimination Tool:

Comparative rates of diffusion of He and SO2 will be _______.

NTS 2012
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

RMgX is an organometallic compound, generally known as:

NTS 2012
Chemistry
Alkyl Halides and Amines
Elimination Tool:

Metals usually produce hydrogen gas with acids. Which of the following produces hydrogen gas with NaOH?

Molecular solids are different from others because they

Which one of the following is saturated hydrocarbon?

If any amino acids contain greater number of NH2, it is:

NUMS 2019 Cancelled
Chemistry
Alkyl Halides and Amines
Elimination Tool:

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

NTS 2016 SMBBMC
Chemistry
Atomic Structure
Elimination Tool:

The study of rates of chemical reactions and the factors that affect the rates of chemical reactions is known as:

PMC 2020
Chemistry
Reaction Kinetics
Elimination Tool:

Which type of alkyl halides gives SN2 mechanism?

NUMS 2019 Reconduct
Chemistry
Alkyl Halides and Amines
Elimination Tool:

0.5 mole of SO2 contains gram of oxygen?

Which one substance is used to remove both H2S and carbon dioxide from biogas?

A polymer called Bakelite is formed by the reaction of phenol with:

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

IUPAC name of the compound (CH3)2-CH-CH(C2H5)-C(CH3)3 is :

NTS 2015 SMBBMC
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

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

NUMS 2020
Chemistry
s and p Block Elements
Elimination Tool:

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

Lowering of vapor pressure Is directly proportional to: a)

The correct order of decreasing solubility of AgCI In A) Water B) 0.1 M NaCi C) 0.1 BaCl2 D) 0.1M NI-43
is?

Hydrolysis of acyl chloride results in the formation of:

NUMS Mock 4
Chemistry
Carboxylic Acids and its Derivatives

Which of the following reaction takes place when acetone reacts with HCN?

NUMS Mock 4
Chemistry
Aldehydes and Ketones

Hydrolysis means reaction with

PMC Sample 3
Chemistry
Electrochemistry
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:

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:

NUMS Mock 4
Chemistry
Chemical Equilibrium

What is a complex/coordination compound?

PMC Sample 1
Chemistry
Periodicity in Elements
Elimination Tool:

Which one of them is used as an automobile antifreeze

PMC Sample 1
Chemistry
Fundamental Principles of Organic Chemistry
Elimination Tool:

The formula of washing soda is:

NUMS 2015
Chemistry
Periodicity in Elements
Elimination Tool:

Which is the paramagnetic oxide of chlorine?

NUMS 2019 Reconduct
Chemistry
s and p Block Elements
Elimination Tool:

Which type of isomerism depends on the distribution of carbon atoms on each side of the functional group?

PreMedPK MDCAT Mock 1
Chemistry
Hydrocarbons
Elimination Tool:

Hybridization of carbon in -CHO group is:

NUMS 2019 Reconduct
Chemistry
Aldehydes and Ketones
Elimination Tool:

Liquid crystals are used for:

The classification of monohydric alcohols is due to

PMC Sample 3
Chemistry
Alcohols, Phenols and Ethers
Elimination Tool:

Which enzyme is used when sugar In molasses is converted to glucose and fructose?

Which of the following acts as an electrophile in the electrophilic substitution of benzene with bromine?

NUMS Mock 1
Chemistry
Hydrocarbons

IUPAC name for [Pt Cl Br (NO2) (NH3)3] Cl is:

NUMS 2015
Chemistry
d and f Block Elements
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:

_____ is a macromolecule found in blood.

PMC Practice 2
Chemistry
Macromolecules
Elimination Tool:

……is a technique to separate impurities from chemical products:

NUMS 2014
Chemistry
Macromolecules
Elimination Tool:

Which of following is an example of electrophilic attack on alcohols?

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

Ethylamine can be prepared by the action of bromine and caustic potash on:

NUMS 2017
Chemistry
Alkyl Halides and Amines
Elimination Tool:

The binding energy of transition metal increases upto group:

NUMS 2020
Chemistry
Periodicity in Elements
Elimination Tool:

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

NUMS Mock 3
Chemistry
Chemical Equilibrium

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:

Which of the following pairs of gases have same rate of diffusion:

NTS 2017
Chemistry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

Example of a nucleophile is:

NUMS Mock 1
Chemistry
Fundamental Principles of Organic Chemistry

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

The sugar unit in DNA molecule is:

NUMS 2019 Reconduct
Chemistry
Macromolecules
Elimination Tool:

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

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

In rhombic sulphur there are atoms in each molecule?

Which one of the following has the lowest % ionic character?

NTS 2016 DUHS & JSMU
Chemistry
Chemical Bonding
Elimination Tool:

Quantum number values for ‘2p’ orbitals are:

PMC 2020
Chemistry
Atomic Structure
Elimination Tool:

In Paper industry, sodium sulphite is buffered with

Organic compounds in which tetravalency of carbon atom is satisfied are called as ____ ?

PMC Practice 1
Chemistry
Hydrocarbons
Elimination Tool:

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:

The suspected liver carcinogen which also has negative reproduction and developmental effect on humans is:

UHS 2011
Chemistry
Environmental Chemistry
Elimination Tool:

Law of mass action was derived by:

NUMS 2014
Chemistry
Chemical Equilibrium
Elimination Tool:

Transition Elements usually show:

NUMS 2015
Chemistry
d and f Block Elements
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:

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:

Which of the following has the maximum specific heat?

What is formed by a series of complex reactions of ozone with water in the troposphere that are driven by sunlight?

NUMS 2019 Cancelled
Chemistry
Environmental Chemistry
Elimination Tool:

How many sigma groups are there in benzene?

NTS 2014
Chemistry
Hydrocarbons
Elimination Tool:

Given the reaction:

C3H6 + 5O2 → 3CO2 +4H2O

At STP, how many liters of O2 are needed to completely burn 5.0 liters of C3H6?

NTS 2010
Chemistry
Stoichiometry
Elimination Tool:

Which one of the following organic compounds have the least carbon-carbon bond length?

NUMS 2017
Chemistry
Hydrocarbons
Elimination Tool:

Which of the following has allotropic forms:

) Which one of the following has no isotope

The process of changing a solid directly into gas upon heating is known as:

12% W/W alcohol In water solution contains water:

Maximum ____ electrons can be placed in one orbital:

NUMS 2020
Chemistry
Atomic Structure
Elimination Tool:

Excluded volume is not equal to the actual volume of gas molecules and is represented by:

Which one is not true for H2SO4?

NTS 2012
Chemistry
Macromolecules
Elimination Tool:

If the number of molecules of different gases are the same at S.T.P., the occupied volume will be _____.

PMC Practice 24
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

Which one of these reacts rapidly with water at room temperature?

An azeotropic mixture of two liquids has a boiling point higher than either of them when it:

NUMS 2016
Chemistry
Solution and Colloids
Elimination Tool:

C12H22O11+ conc. H2SO4—> 12 C + ? + H2SO4

NTS 2016 SMBBMC
Chemistry
Stoichiometry
Elimination Tool:

Which of the following statements best describes how a catalyst works

NUMS 2018
Chemistry
Reaction Kinetics
Elimination Tool:

Odour of formaldehyde Is:

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

UHS 2011
Chemistry
Environmental Chemistry
Elimination Tool:

On balancing the following chemical equation: K2CrO4, + HCI –> KCI + 2CrCI3 + Cl2 + H2O The co-efficient with HCI will be?

Which of the following will not undergo aldol condensation?

NUMS Mock 2
Chemistry
Aldehydes and Ketones