Question # 1

Number of electrons that an be accomodated in f - subshell

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6

10

2

14

The electronegativity of carbon is

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2.5

2.0

1.0

4.0

What will hapen to the concentrations of the prodcut if a reversible reaction at eqiulibrium is not distrubed.

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They will keepon increasing

They will keep on decreasing

They will remain constant

They willremain constant for some time and then start decreasing

How many lone pairs are present on nitogenin ammonia molecule.

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One

Two

Three

Four

Hydrogen and Helium follow.

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Octet rule

Triple rule

Duplet rule

None of these

The amoutn of energy given out when an electron is added to an eatom is called.

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Electron affinity

Lattice energy

Ionization energy

Electronegativity

Elements of a period show properties.

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Same

Different

Both a and b

None of these

A substance formed when two or more different elements combine chemically.

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Compund

Solution

Element

Atom

Which is strongest oxidizing agent.

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Cholorine

Iodine

Fluorine

Bromine

How many atom of carbon are present in one molecule of glucose.

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11

22

12

6

The man made polymer is

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Polystyrene

Starch

Protein

Cellulose

Dichloromethane reacts with halogens in the presence of diffused sun light and produces

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Carbon tetrachloride

Chloroform

Chloromethane

No reaction

All water soluble metallic oxides have characteristic of:

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acidic

basic

neutral

amphoteric

A sea level the boiling point of water is.

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0^oC

98^oC

100^oC

110^oC

Which one of the following statements about glucose and sucrose is incorrect.

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Soluble in water

Naturally occuring.

Carbohydrates

Disaccharides

Monosaccharides are crystalline solids

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Grey

Crimson

Silver

White

In laboratory urea was prepared by

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Wohler

Rutherford

Berzelius

Dalton

According to Lewis concept a base is a substance which can donate.

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Proton

Electron pair

Neutron

Electron

Which one of the ore of copper?

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Copper glance

Chalcopyrite

Both a and b

None of these

Which hydrocarbon decolorizes the pink colour of acidic solution of potassium permanganate?

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CH₄

C₂H₄

C₂H₆

C₂H₅

The characteristics of reversible reactions are the following except:

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Products never recombine to form reactants.

They never complete

The proced in both ways

They have a double arrow between reactants and products.

In an irreversible reaction dynamic equilibrium:

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Never establishes

Established before the completion of reaction

Establishes after the completion of reaction

Establishes readily

The commonly used unit of pressure by meteorologists is.

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Atmosphere

Pascal

Milli

Pound inch3

Orbitals having same energy are called.

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Hybrid orbitals

Valance orbitals

Degenerate orbitals

d- orbitals

Electrode of the lead storage battery are immersed in dilute H2SO4 which has strength by mass

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100%

98%

30%

10%

Which one of the following gases cannot be liquefied by Line's method.

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Water vapours

NH3

Nitrogen

H2

Which is not used as drying agent in a desiccator.

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Cacl2

NaCl

P2O5

Salica Gel

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

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Butter is solution of

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Liquid in liquid

Solid and liquid

Liquid and solid

Liquid and gas

An azeotropic mixture of two liquids boils at lower temperature than either of them when.

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It is saturated

It shows positive deviation from Raoult's law

It shows negative deviation from Raoult's law

It is metastable

The number of moles of hydrogen atoms in 3.2 g of methane CH4.

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0.2

0.4

0.6

0.8

The shape of H₃O is

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Tetrahedral

Angular

Trigonal planer

Pyramidaj

In gas occupies a volume of 2 dm³at 27°C and I atm pressure. The expression for its volume at S.T.P. is

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Elimination Bimolecular reactions involve

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Second order kinetics

First order kinetics

Third order kinetics

Zero order kinetics

Which one of the followings is major product when HBr reacts with 2-butene

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2- bromobutane

1- bromobutane

1-1 di bromobutane

1,2 di bromobutane

Which of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lipase

Which woody raw material is used for the manufacture of paper pulp.

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Cotton

Bagasse

Poplar

Rice straw

Which substance is used to convert ethanol to ethyl chloride

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SOCl2

PCl3

PCl5

All of these

Lowest oxidation state of nitrogen is present in.

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NH3

NO2

NO

HNO3

Which alkyne reacts with water and form aldehyde

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Ethyne

Propyne

1- Butyne

2- Butyne

Which substance is water repellant and used in ceramic insulators.

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Asbestos

Lead compounds

Silicon carbide

silicones

Acetaldehyde undergoes, aldol condensation in the presence of.

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dil HNO3

DIL NaOH

dil HCl

Conc. H2SO4

In which block of periodic table non metals are present.

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s

p

d

f

Which elements are deposited at the cathode during the electrolysis of brine in diaphragm cell

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H₂

Ba

Ra

Rn