Question # 1

The transition temperature of sulphur is:

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96 °C

250 °C

18 °C

218 °C

The solubility of which salt increases in heating?

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Li₂SO₄

Ce₂(SO₄)₃

NaCI

KCI

The study of hydrocarbons and their derived compounds is called

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Physical chemistry

Inorganic chemistry

Organic chemistry

Biochemistry

Bucky balls are ____________ allotropic forms of carbon.

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1st

2nd

3rd

4th

Effusion is a property of:

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Gases

LIquids

Solids

Plasma

Gold was used for utensils as early as ____________ BC.

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3400

3500

3600

3700

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

Which shows Tyndall Effect?

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Slution

Colloid

Suspension

True solution

Bucky molecules have ________________ c-atoms.

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20-60

20-90

40-60

40-100

The molecular mass of water is

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16 amu

14 amu

18 amu

20 amu

According to Bohr, electrons can revolve only in this orbits whose angular momentum is

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h/2π

n 2h/π

n h2/2π

n h/2π

Ammonical brine is prepared by dissolving ammonia gas in.

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NaCl

CaCO₃

CaCl₂

Na₂SO₄

The water which produces good lather with soap is called:

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soft water

hard water

heavy water

typical water

Which one of the following is used as jet fuel.

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Kerosene oil

Lubricating oil

Fuel oil

Diesel oil

The % age of carbon is coal is

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40-60

50-70

40-80

40-90

Fertilizers are used to make up the deficiency of;

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oxygen and carbon

iron and magnesium

nitrogen and phosphorus

hydrogen and calcium

Water dissolves Non-ionic compounds by:

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Ion-Ion forces

Dipole forces

Dipole - Dipole forces

Hydrogen Bonding

Which part of digestive system glucose absorb.

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Stomach

Liver

Small intestine

Large intestine.

Which one of the following disease causes severe diarrhea and can be fatal:

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Jaundic

Dysentery

Cholera

Typhoid

Gelatin protein is found in.

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Blood

Skin

Heart

Bones

The density of water is ................. at 4^oC

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1 gcm^-1

2 gcm^-1

3 gcm^-1

4 gcm^-1

Infrared radiation emitted by the earth are absorbed by?

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CO₂,H₂O

N₂,O₂

CO₂,N₂

O₂,CO₂

When water freezes at 0°C, its density decreases due to

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Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

The unit of Kc for the reaction N2 +O2 = 2NO will be

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mol dm-3

mol-1 dm+3

mol-2 dm+6

No units

Which element has highest ionization potential

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Li

Na

K

Rb

Water and Phenol are partially miscible to each other at room temperature when both liquids are mixed together which is upper layer.

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Water in Phenol

Phenol and water

Pure phenol

Pure water

The H - H Bond energy in KJ mole -1 is.

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346

436

463

336

Drying agent used in crystallization is.

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P2O3

Animal charcoal

KMnO4

Water

In the ground state of an atom the electron is present.

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In the nuclsus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

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

Sum of pKa and pKb is equal to.

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1

7

0

14

In NICAD dry cell, the cathode and anode is made up of.

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Ca and Ag

Ni and CdO2

NiO2 and Cd

Ag and Ag2O

Cell potential depends upon

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Temperature

Concentration of ions

Nature of electrolyte

All of above

Which element reacts with carbon to form metal carbide.

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Li

Na

K

All of these

An atom or group of atoms, which confers characteristic properties to organic compounds, are called.

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Isomerism

Metamerism

Ligands

Functional groups

During nitration of benzene, the active nitrating agent is

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NO₃

NO₂⁺

NO₂^-

HNO₃

Ammonium nitrate fertilizers is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

Which one of following is used in cosmetics

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Talc

Asbestos

Sodium sulphate

Aluminium Sulphate

Potassium fertilizers are especially useful for

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Tobacco

Coffee

Potato

All of these

Which one of the following will be required to form ethene from ethyl chloride.

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Alcoholic KOH

Aqueous KOH

Alkaline KMnO4

Bromine

When CO2 is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is.

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Propane

Propanoic acid

Propanal

Propanol

When Cu reacts with conc. HNO3 , which one of the following gases is evolved

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N2O

NO

NO2

N2O5

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

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Cotton

Bagasse

Poplar

Rice straw

Which substance reacts with sodium nitroprusside.

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Ethanol

Acetaldehyde

Dimethyl ketone

Methanol