Question # 1

Alpha particles are double charged.

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Negative

Positive

Can be both

Nil

Number of protons+ neutrons is :

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Atomic mass

Mass numbers

Both

Nil

The molar mass of H₂SO₄ is:

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98 g

98 amu

9.8 g

9.8 amu

An ________________ scientist arranged the elements in order in periodic table.

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English

Italian

African

Indian

Mixture has _________ types.

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3

2

1

No types

T (K) =

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(T) °C + 273

(T) °C -273

(T) °C + 373

(T) °C -373

The no.of neutrons in deutrium is

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1

2

3

4

Which one metal can be cut with a knife?

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Na

Mg

AI

Ca

When a saturated solution is diluted it tuns into:

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supersaturated solution

saturated solution

a concentrated solution

unsaturated solution

It is a good reducing agent

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Fe

H

C

O

The SI unit of pressure is:

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N

N/m²

Pascal

atm

the chemical formula of chalcopyrite is:

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Cu₂S

CuFe₂S

CuS

FeS

The bond in the product of lewis acid base reaction.

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Ionic

Covalent

Metallic

Coordinate covalent

Global warming is because of.

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Absorption of infrared radiation emitted by earth surface.

Absorption of infrared radiation coming from sun.

Absorption of infrared Ultraviolet coming from the sun.

Emission of ultraviolet radiation from the earth's surface.

Arrhenius put forward acid base concept in.

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1878

1786

1787

1790

Main component of Natrual gas.

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CH₃

CH₄

C₂H₆

C₂H₂

Lavoisier named binary compounds of oxygen acids in .

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1787

1790

1815

1828

Which disease cause when humans use water of industrial effluents.

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Cancer

Asthma

Jaundice

cholera

Which hepatitis is caused by contaminated water?

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Hepatitis A

Hepatitis B

Hepatitis C

Hepatitis D

The color of Fe(OH)₂ ppt is.

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White

Brown

Muddy green

Blue

Smell of rancid butter is due to the presence of.

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Propanoic acid

Butanoic acid

Acitic acid

Citric acid

The % age of nitrogen and oxygen in our atmosphere is:

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80

90

95

99

Quantum number value for 2p sub shell are

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n = 2, I = 1

n = 1, l =1

n = 1, l = 0

n = 2, l = 0

Which of the following can form H-bonds

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NH₃

C₂H₆

NaCI

CHCI₃

The difference of potential of two electrodes when concentration of solution is 1 M each at 25^oC and 1 atmosphere is called.

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Electrode potential

Standard cell potential

Cell reaction

Cell voltage

When aqueous NaCl is electrolyzed, which of the following ions gas discharged at anode.

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Cl-

OH-

Na+

H+

The free expansion of the gas from high pressure towards the low pressure causes

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Increase of temperature

Decrease of temperature

Grater number of collisions among the molecules

Decrease of velocity of gas molecules

For a given process, the heat change at constant pressure (q_p) and at constant volume (q_v) are related to each other as

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q_p= q_v

q_p< q_v

q_p> q_v

q_p= q_v/2

Percentage ionic character of HF is.

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100%

80%

43%

57%

Which one of the following methods will be used to separate the mixture of NaCl and sand.

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Chromatography

Solvent extraction

Sublimation

Filtration

Conduction of electricity through gases under reduced pressure is due to the transportation of.

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positive charge

Negative charge

Both types of charges

None of these

The deviation of a gas from ideal behavior is maximum at.

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-10 ^oC and 5.0 atm

-10^oC and 2 atm

0^oC and 2 atm

100^oC and 2 atm

Which of the following represents electronic configuration of the most electropositive elements

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He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

Which one of the following is calcareous material

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Marine shells

clay

Shale

Blast furnace slag

Nucleophilic substitution reactions, which are completed in two steps are called as.

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SN1

SN2

E1

E2

Which one of following is used in cosmetics

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Talc

Asbestos

Sodium sulphate

Aluminium Sulphate

The conversation of n-hexane into benzene by heating in in the presence of Pt is called

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Isomerization

Aromatization

Dealkylation

Rearrangement

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

Vinyl chloride when boiled with alcoholic KOH , gives

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Acetylene

Ethylene

Ethene

Ethyl alcohol

Acetic acid manufactured by

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Distillation

Fermentation

Ozonolysis

Esterification

What is Glacial acetic acid

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Pure acetic acid

95% acetic acid

a mixture of acetic acid and glycerol

Vinegar

Which one of the following complexes is chelate.

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Potassium hexacyanoferrate (II)

Diammine silver (I) Chloride

Tetracarbonylnikel (0)

Sodium dioxalatoplatinate (II)

Ethanol on oxidation in the presence of K2Cr2O7 and Conc. H2SO4 changes to.

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Acetaldehyde

Ethane

Ethene

CO2 and H2O

Which one of the following compound is not of a polymer.

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Starch

Glucose

Protein

Nylon -6, 6