Question # 1

Which isotope is used in nuclear reactors.

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U-234

U-235

U-238

All of these

An Inorganic chemistry places one mle of PCl5 in container A and one mole of each Cl2 and PCl3 in container B. Both the containers were sealed and heated to the same temperture to reach the stte of equilibrium Guess about the composition of mixtures in both the containers.

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Both the containers wil have zero concentration of its reactants.

Both the containers wil hae the same composition of mixtures

Container A will have more concentraion of PCl3 than B.

Container A will have less concentraion of PCl3 than B.

Elements of a period show properties.

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Same

Different

Both a and b

None of these

Which element has the highest melting point.

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K

Cs

Na

Rb

When the tiny particles of a substance are dispersed athough a medicium, the mixture is named as.

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True solution

Suspension

Colloid

Heterogeneios mixture

How many covalent bonds do N2 molecule have

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3

4

2

5

Acids means

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Bitter

Salty

Sweet

Sour

How many moles are there in 25 g of H₂SO₄?

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0.765 Moles

0.255 moles

0.4 moles

0.51 moles

Avogadrao was a scientist

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Italian

Greek

Garman

African

How many lone pairs are present on nitogenin ammonia molecule.

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One

Two

Three

Four

The boiling point of alcohal is

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₄₄^oC

78^oC

53^oC

19^oC

General formula of Alkynes is.

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C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-2

C_nH_2n-2

Inland water includes.

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River

Lakes

Streams

All of them

Which one is the simplest sugar which can not be hydrolyzed?

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Glucose

Sucrose

Starch

Cellulose

In chemical reaction , the substances that combine are called.

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Reactants

Products

Equlibrium

Numerator

Water dissolves non-ionic compound by

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Ion-ion forces

Ion-dipole forces

Dipole -dipole forces

Hydrogen bonding.

Which of the following is a poisonous gas.

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Oxygen

Ozone

Nitrogen

Carbon dioxide

Vital force theory was rejected by.

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Jabir Bin Hayan

Drawin

Wohler

Berzellius

How many % age of urea is used as fertilizers?

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80%

90%

95%

98%

_________ acid is used in lead storage batteries as electrolyte.

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CH₃COOH

HCl

HNO₃

H₂SO₄

The elements that do not conduct heat and electricity are called.

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Metallurgy

Non metal

Metalloid

Alloy

At the height 880120 km from earth's surface is.

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Troposphere

Mesosphere

Stratosphere

Thermosphere

In order to have good crystals of a substance the temperature of the system at the time of preparation of solution should be

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Around 0°C

Around room temperature

Sufficiently more than room temperature

Just above the room temperature

In silver oxide battery, the cathode is mad up of.

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AgO

Ag2O

Ag2O3

Ag

Which of the following wave properties is inversely proportional to the energy for electromagnetic radiations

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Frequency

Wave number

Velocity

Wave length

In solvent extraction, solute can be separated from solution, by shaking the solution with solvent in which the solute is.

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More soluble

Partially soluble

Insoluble

soluble at high temp

The lightest value of lattice energy is for which one of these ionic compounds.

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NaI

NaF

NaBr

NaCl

Solubility of which substance decreases by incressing temperature.

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NaNO3

KNO2

NaCl

Ce2(SO4)3

The boiling point of pure water at 1 atm pressure is.

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98^oC

100^oC

69^oC

120^oC

The charge on electron was determined by millikan in his oil drop experiment and its value is

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6.023 x 10^-23C

1.602 x 10^-23C

1.602 x 10^-19C

6.625 x 10^-34C

After 3 half lives of a chemical reaction, the % fraction of the amount left is

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6.25

75

12.5

50

Stronger the oxidizing agent greater is the

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Oxidation potential

Reduction potential

Redox potential

E.M.F of cell

Alkali and alkaline earth metal are usually obtained by

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Decomposition of their carbonates

By heating their hydroxide

electrolysis of molten metal oxides

Electrolysis of molten metal halides

Which of the following acids possess oxidizing and reducing properties.

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HCl

HNO2

HNO3

H2SO4

Flavour of ethyl butyrate is

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Orange

Pine apple

Banana

Apricot

Which of the following are alkaline earth metals?

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Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

Across a period from left to right in the periodic table, the melting and boiling point.

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Decrease

Increase

Remain constant

First increase upto the middle of period and then decrease

SN1 reaction usually occurs in

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All of these

Zwitter ion is

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Dipolar ion

Amino acid with two amino groups

Amino acid with two carboxylic acid group

A synthetic amino acid

Catalyst used to reduce carboxylic acid to alcohol is

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H₂/ Ni

H₂/ pt

NaBH₄

LiAIH₄

Which one of the following sets has coinage metaals is it.

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Cu, Hg, Au

Cu, Ag, Au

Ag, Au, Hg

Cu, Fe, Au

Systematic name of phthalic acid is

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Benzenedicarboxylic acid

Benzene doioc acid

1,2 benzenedicarboxylic acid

o, carboxylic benzoic acid

Which one is not use of lime

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Extraction of metals

Ceramic industry

Preparation of bleaching powder

Preparation of gypsum

The anhydride of HCIO₄is

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CIO₃

CIO₂

Cl₂O₅

Cl₂O₇