Isomers have same properties:

A.    Physical & Chemical

B.     Nuclear

C.     Chemical✔

D.    Physical

Heat evolving reaction is called the?

A.    Endothermic reaction

B.     Fast reactions

C.     Reversible reaction

D.    Exothermic reaction✔

Concentrated sulphuric acid acts as?

A.    Dehydrogenating agent

B.     Hydrogenating agent

C.     Decarboxylating agent

D.    Dehydrating agent✔

Covalent compounds mostly exist in the form of:

A.    Protons

B.     Neutrons

C.     Molecules✔

D.    Atoms

The number of subatomic particles in atoms so far discovered is more than:

A.    90

B.     110

C.     100✔

D.    125

Heat evolving reaction is called the?

A.    Endothermic reaction

B.     Reversible reaction

C.     Fast reactions

D.    Exothermic reaction✔

The shape of molecule of methane is?

A.    Square planner

B.     Trigonal

C.     Tetrahedral✔

D.    Planner

The phenomenon of cooling on sudden expansion of gases is called?

A.    Joule Thomson effect✔

B.     Boyl's effect

C.     Charl's effects

D.    Compton's effect

Elements which do not react with other elements, have their outermost shell?

A.    Complex shaped

B.     Completely filled✔

C.     Half filled

D.    Completely empty

The term 'Paraffins'  has been derived from?

A.    Arabic words

B.     French words

C.     Greek words

D.    Latin words✔

The shape of molecule of methane is?

A.    Square planner

B.     Planner

C.     Tetrahedral✔

D.    Trigonal

Cathode rays can cast shadows' was discovered by?

A.    J.J. Thomson

B.     Roentgen

C.     Hittorf✔

D.    William crooks

Azimuthal quantum number describes the?

A.    Spin of an electron

B.     Shape of an orbital✔

C.     Energy of election

D.    Orientation of an orbital

Saturated hydrocarbons are called?

A.    Alkynes

B.     Alkenes

C.     Alicyclic hydrocarbons

D.    Alkanes✔

From top to bottom in a group, the ionization energy?

A.    Decreases✔

B.     Remains constant

C.     Becomes zero

D.    Increases

100% covalent bond exists between atoms of?

A.    Same group

B.     Different elements

C.     same elements✔

D.    Different ions

A solution is a?

A.    Hemogeneous mixture✔

B.     Heterogeneous mixture

C.     Normal mixture

D.    None of these

Urea contains nitrogen?

A.    40%

B.     36%

C.     46%✔

D.    50%

Matter having chemically identical atoms is called?

A.    Pure matter

B.     Compound

C.     Element✔

D.    Substance

The experimental relationship between a reaction rate and the concentration of the reactants is known as?

A.    Law of man action

B.     Rate law✔

C.     Order of reaction

D.    Rate of reaction

At transition temperature two forms co-exist?

A.    Crystalline forms✔

B.     Isomeric forms

C.     Isotopic forms

D.    Allotropic forms

Properties of gases and liquids are?

A.    Anisotropic

B.     Isomeric

C.     Isotropic✔

D.    Isomorphic

Gaseous pressure is the force exerted by gas on unit?

A.    Area✔

B.     Length

C.     Capacity

D.    Volume

Surface tension is measured in units of?

A.    Ergs

B.     Joule

C.     Nm -1✔

D.    N f

Wood spirit is the commercial name of?

A.    Ethyl alcohol

B.     Phenol

C.     Ethanol

D.    Methyl alcohol✔

In interstitial hydrides, the transition metals actually?

A.    Absorb hydrogen

B.     Adsorb hydrogen✔

C.     React with atomic hydrogen

D.    React with hydrogen

The mass of one mole of iodine:

A.    127 g

B.     245 g✔

C.     74 g

D.    53 g

The SI unit  for measurement of pressure is

A.    Atmosphere

B.     Pounds per square inch

C.     Newton

D.    Pascal✔

The branch of chemistry which deals with quantitative relationship between reactants and products in a balanced chemical equation is called:

A.    Analytical

B.     Inorganic chemistry

C.     Stoichiometry✔

D.    Biochemistry

A limiting reactants is one:

A.    Which is present in least amount

B.     Does not effect the amount of product

C.     Which produces maximum number of moles of product.

D.    Which produces minimum number of moles of product. ✔

The calculations based on stoichiometry are known as:

A.    Simple calculations

B.     None of above

C.     Complex calculations

D.    Stoichiometric calculations✔

Which compound does not show in isomerism?

A.    Hexane

B.     Butane

C.     Pentane

D.    Propane✔

Determination of atomic masses and invention of system of writing symbols was made by:

A.    None of the above

B.     J. Berzelius✔

C.     Democritus

D.    Dalton

The reasons for less experimental yield than theoretical yield are reversible reaction, side reaction and:

A.    Crystallization✔

B.     Temperature

C.     Maximization

D.    Pressure

Geological survey of Pakistan estimates about billion tons of coal in Pakistan:

A.    185

B.     182

C.     183

D.    184✔

Pentane has isomers:

A.    One

B.     Four

C.     Two

D.    Three✔

Swedish chemist J. Berzelius determined:

A.    Atomic mass✔

B.     Atomic number

C.     Atomic density

D.    Atomic volume

First atomic theory was put forward by an English school teacher:

A.    Newton

B.     Sanger

C.     John Dalton✔

D.    Maxwell

Atoms can be evident by the use of electron microscope. field ionization microscope and:

A.    Telescope

B.     x-rays✔

C.     Video camera

D.    Compound microscope

Non-metals tend to gain electrons, becoming:

A.    Positively charged ions

B.     Negatively charged ions✔

C.     Metals

D.    All of above

An ion having negative charge is called:

A.    Electron

B.     Photon

C.     Anion✔

D.    Cation

Height of the liquid risen in the capillary tube depends upon the?

A.    Temperature of liquid

B.     Material of capillary tube

C.     Length of capillary tube

D.    Diameter of capillary tube✔

The total heat contents of a system is called?

A.    Chemical potential

B.     Entropy✔

C.     Enthalpy

D.    Bond energy

The equation E= mc2 was given by?

A.    Planck

B.     Louis Victor Prince de Broglei

C.     Neils Bohr

D.    Albert Einstein✔

In a solution of both KCI and KClO₄  precipitating compound is?

A.    Both KCI and KCIo4 equally

B.     None of these

C.     Only KCIo4✔

D.    Only KCI

Commercial nitric acid is?

A.    70 %✔

B.     86%

C.     46%

D.    36%

Nascent hydrogen is denoted by symbol?

A.    (H+)

B.     [H] ✔

C.     H2

D.    (H-)

The purest form of iron is

A.    wrought iron✔

B.     steel

C.     pig iron

D.    nickel steel

Chemical formula of white lead is?

A.    Pb3O4

B.     PbCO3 Pb(OH)2✔

C.     PbCrO4

D.    PbO

The term 'Paraffins'  has been derived from?

A.    Arabic words

B.     French words

C.     Greek words

D.    Latin words✔

Which one of following id not crystalline?

A.    Disaccharide

B.     Polysaccharide✔

C.     Oligosaccharides

D.    Monosaccharide

While dividing exponential numbers, the exponents are?

A.    Divided

B.     Added

C.     Subtracted✔

D.    Multiplied

In the formation of interstitial hydrides, hydrogen undergoes?

A.    Chemical reaction

B.     Chemical inactivation

C.     Adsorption✔

D.    Absorption

What among following is used to produce artificial rain ?

A.    Copper oxide

B.     Carbon monoxide

C.     Silver iodide✔

D.    Silver nitrate

Hydrogen bomb is based on the principle of

A.    nuclear fission

B.     nuclear fusion✔

C.     natural radioactivity

D.    artificial radioactivity

Acetic acid is ionizable?

A.    Not ionizable

B.     Weakly✔

C.     Very strongly

D.    Strongly

Charge to mass ratio (e/m) was determined by?

A.    J. Perrin

B.     William Crooks

C.     R.A Millikan

D.    J.J Thomson✔

Which of the following is a non-metal that remains liquid at room temperature  ?

A.    Chlorine

B.     Phosphorous

C.     Bromine✔

D.    Helium

Dobereiner arranged similar elements into groups called?

A.    Decades

B.     Octanes

C.     Triads✔

D.    Tetrade

Usually chemical reactions take place in?

A.    Gaseous phase

B.     Solutions✔

C.     Very high pressure

D.    Mixture from

The S.I units of dipole moments are?

A.    Joule

B.     Joule meter

C.     Coulomb

D.    Coulomb meter✔

Boron hydrides are?

A.    Electron deficient hydrides✔

B.     Interstitial hydrides

C.     Electron rich hydrides

D.    Neutral hydrides

The building blocks of proteins are called?

A.    Carboxylic acids

B.     Lipids

C.     amino acids✔

D.    Monosaccharides

The term PVC used in the plastic industry stands for

A.    polyvinyl chloride✔

B.     polyvinyl carbonate

C.     phosphorus vanadium chloride

D.    phospha vinyl chloride

Among the following the maximum covalent character is shown by the compound

A.    MgCl2MgCl2

B.     FeCl2FeCl2

C.     SnCl2SnCl2

D.    AlCl3AlCl3✔

Major component of natural gas is:

A.    Ethene

B.     Ethane

C.     Methane✔

D.    Propane

Compounds having same molecular formula but different structures are said to be?

A.    Allotropes

B.     Isomorphs

C.     Isomers✔

D.    Isotopes

Substances which are added to the soil to provide nutrients to plants are called?

A.    Pesticides

B.     Minerals

C.     Growth hormone

D.    Fertilizers✔

Atoms and molecules can either gain or lose electrons, forming charged particles called:

A.    Positrons

B.     Ions✔

C.     Photons

D.    Electrons

Isomers are written for a compound, if it has carbon atoms at least:

A.    One

B.     Two

C.     Three

D.    Four✔

The first step in naming a compound is the selection of?

A.    Longest carbon chain✔

B.     A carbon ring

C.     Functional group

D.    Shortest carbon chain

Chemical formula of witherite is?

A.    MgCo3

B.     CaCO3

C.     MgCO3 CaCO3

D.    BaCO✔

A ‘breath test’ used by traffic police to check drunken driving uses ____?

A.    Turmeric on filter paper

B.     Silica gel coated with silver nitrate

C.     potassium permanganate-sulphuric acid

D.    Potassium dichromate-sulphuric acid✔

What is the third most common gas found in the air we breathe?

A.    Argon✔

B.     Neon

C.     Carbon dioxide

D.    Hydrogen

The isotopes of chlorine with mass number 35 and 37 exist in the ratio of

A.    1:2

B.     2:3

C.     3:1✔

D.    3:4

Reaction of HNO₃with benzene gives:

A.    Maleic anhydride

B.     Nitrobenzene✔

C.     Benzophenone

D.    Benzene sulphonic acid

Among the given nutrients, milk is a poor source of

A.    Calcium

B.     Protein

C.     Vitamin C✔

D.    Carbohydrates

The M.K.S. system was first introduced by

A.    Archimedes

B.     Einstein

C.     Newton

D.    Giorgio✔

Which one of the following is not a mixture

A.    air

B.     mercury✔

C.     milk

D.    cement

Sodium carbonate crystal lose water molecules this property is called

A.    hygroscopy

B.     deliquescence

C.     efflorescence✔

D.    None of these

Which term was derived from “aroma”?

A.    Hydrocarbons

B.     Atom

C.     Aromatic✔

D.    Aliphatic

Which of the following acid can be used as a catalyst in Friedel Craft’s reactions?

A.    NaCl

B.     AlCl₃✔

C.     BeCl₂

D.    HNO₃

A mixture of sand and naphthalene can be separated by

A.    Fractional distillation

B.     Sublimation✔

C.     Chromatography

D.    Any of them

Which one of the following substances does not have a melting point?

A.    bromine

B.     sodium chloride

C.     mercury

D.    glass✔

Arenes are also called:

A.    Atom

B.     Aromatic

C.     Benzene✔

D.    Hydrocarbons

Cobalt - 60 is commonly used in radiation therapy because it emits

A.    Alpha - rays

B.     Beta rays

C.     Gamma rays✔

D.    X - rays

A radioactive substance has a half-life of four months, three-fourth of the substance would decay in

A.    3 months

B.     4 months

C.     8 months✔

D.    12 months

What is the element present in urea?

A.    C6H12O6

B.     CH3I

C.     HNC

D.    CO(NH2)2✔

Name the Scientist who stated that matter can be converted into energy

A.    Boyle

B.     Lavoisier

C.     Avogadro

D.    Einstein✔

SI unit of equivalent conductance

A.    ohm/cm

B.     Siemens m2/equivalent✔

C.     Siemens/equivalent

D.    mho/cm

Acetic acid is manufactured by:

A.    Fermentation✔

B.     Esterification

C.     Ozonolysis

D.    Distillation

Who is regarded as father of modern chemistry ?

A.    Ruterford

B.     Einstein

C.     Lavoisier✔

D.    C.V. Raman

In known elements, the maximum number is of

A.    Metals✔

B.     Non Metals

C.     Metalloids

D.    None of these

A carboxylic acid contains:

A.    A carboxyl group✔

B.     A hydroxyl group

C.     A hydroxyl and carboxyl group

D.    A carboxyl and aldehyde group

Fuel cells are the means by which chemical energy may be converted into:

A.    Sound energy

B.     Potential energy

C.     Electric energy✔

D.    Heat energy

Most metals are conductors of electricity because of the:

A.    Immobility of the electrons

B.     Light weight

C.     Lustrous surfaces

D.    Relatively free movement of their electrons✔

Alpha rays consists of:

A.    Protons

B.     Helium nucleus✔

C.     Neutrons

D.    Hydrogen nucleus

Rare gases are

A.    Mono atomic✔

B.     Di atomic

C.     Tri atomic

D.    None of above

The nature of positive rays depends on:

A.    All

B.     Nature of electrode

C.     Nature of resident gas

D.    Nature of discharge✔

Which of the following was discovered first?

A.    Charge of electron

B.     All of above at same time✔

C.     Mass of electron

D.    None of the above

X-rays have same nature as:

A.    Beta rays

B.     Alpha rays

C.     Cathode rays

D.    Gamma rays✔

According to Planck energy travels is a discontinuous manner and it is composed of large number of tiny discrete units called:

A.    Photons

B.     Planta

C.     Quanta✔

D.    Particles

Metallic conduction is also called as:

A.    Super conduction

B.     Protonic conduction

C.     Electronic conduction✔

D.    Ionic conduction

The e/m value for positive rays is maximum:

A.    Oxygen

B.     Hydrogen✔

C.     Nitrogen

D.    Helium

Which acid is used in the manufacture of synthetic fibre?

A.    Formic acid

B.     Carbonic acid

C.     Oxalic acid

D.    Acetic acid✔

Fuel cells are mostly used in space aircrafts as the source of:

A.    Drinking water and power✔

B.     Drinking water only

C.     Power only

D.    Fuel and drinking water

Mg+O2=MgOMg+O2=MgO✔

A.    2Mg + O2 ----> 2MgO

B.     2Mg + O ----> 2MgO

C.     2Mg + O ----> MgO2

D.    2Mg + O2 ----> MgO2

The difference of potential of two electrodes when concentration of solution is 1 M each at 25°C and 1 atm is called:

A.    Standard cell potential✔

B.     Cell voltage

C.     Cell reaction

D.    Electrode potential

A reaction will be spontaneous if its calculated emf is:

A.    Zero

B.     Negative

C.     Positive✔

D.    Positive or Negative

Reduction or oxidation potential of standard hydrogen electrode is:

A.    1.8 volt

B.     0.8 volt

C.     volt✔

D.    volt

Esters are used as:

A.    Fertilizers

B.     Points

C.     Artificial flowers✔

D.    Dyes

The conversion of chemical energy into electrical energy requires:

A.    Galvanic cell and Voltaic cell✔

B.     Galvanic cell

C.     Electrolytic cell

D.    Voltaic cell

Which acid is present in lemon?

A.    Malic acid

B.     Citric acid✔

C.     Lactic acid

D.    Tartaric acid

The enzyme that converts glucose to ethyl alcohol is

A.    Maltase

B.     Zymase✔

C.     Diastase

D.    Invertase

Aromatic hydrocarbons are the derivatives of:

A.    Alkene

B.     Cyclohexane

C.     Normal series of paraffins

D.    Benzene✔

Which one is not metal?

A.    sulphur

B.     sugar

C.     nitrogen

D.    all of these✔

Aroma means:

A.    Least affinity

B.     Indivisible

C.     Rock oil

D.    Fragrant✔