Chemistry Online Quiz Test 04

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Chemistry Online Quizzes

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Free Chemistry Quiz Test 04

The two elements that are frequently used for making transistors are
(A) Boron and Aluminium
(B) Silicon and Germanium
(C) Iridium and Tungsten
(D) Niobium and Columbium

Answer
Silicon and Germanium

Actinides are the elements with atomic numbers from
(A) 97 to 104
(B) 101 to 115
(C) 89 to 103
(D) 36 from 43

Answer
89 to 103

What is laughing gas?
(A) Nitrous Oxide
(B) Carbon monoxide
(C) Hydrogen peroxide
(D) Sulphur dioxide

Answer
Nitrous Oxide

From which mineral is radium obtained?
(A) Rutile
(B) Haematite
(C) Limestone
(D) Pitchblende

Answer
Pitchblende

Which of the following are the ingredients of gun metal?
(A) Iron, Zinc and Titanium
(B) Iron and Tin
(C) Iron, Brass and Tin
(D) Copper, Tin and Zinc

Answer
Copper, Tin and Zinc

Sodium metal is kept under
(A) Petrol
(B) Alcohol
(C) Water
(D) Kerosene

Answer
Kerosene

Which of the following is in liquid form at room temperature?
(A) Lithium
(B) Sodium
(C) Francium
(D) Cerium

Answer
Francium

Which of the following was to be discovered first in the chromospheres of the sun?
(A) Krypton
(B) Xenon
(C) Neon
(D) Helium

Answer
Helium

Most soluble in water is
(A) Camphor
(B) Sulphur
(C) Common salt
(D) Sugar

Answer
Sugar

The most important ore of aluminum is
(A) Galena
(B) Calamine
(C) Calcite
(D) Bauxite

Answer
Bauxite

Soda water contains
(A) Carbonic acid
(B) Sulphuric acid
(C) Carbon dioxide
(D) Nitrous acid

Answer
Carbon dioxide

Permanent hardness of water may be removed by the addition of
(A) Sodium Carbonate
(B) Alum
(C) Potassium Permanganate
(D) Lime

Answer
Sodium Carbonate

Potassium nitrate is used in
(A) Medicine
(B) Fertilizer
(C) Glass
(D) Salt

Answer
Fertilizer

Carbon, diamond and graphite are together called
(A) Allotrope
(B) Isomers
(C) Isomorphs
(D) Isotopes

Answer
Allotrope

Monazite is an ore of
(A) Zirconium
(B) Titanium
(C) Iron
(D) Thorium

Answer
Thorium

Non stick cooking utensils are coated with
(A) Black paint
(B) PVC
(C) Teflon
(D) polystyrene

Answer
Teflon

The element common to all acids is
(A) Hydrogen
(B) Carbon
(C) Sulphur
(D) Oxygen

Answer
Hydrogen

The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
(A) Bromine
(B) Fluorine
(C) Chlorine
(D) Sulphur

Answer
Sulphur

The average salinity of sea water is
(A) 3%
(B) 3.5%
(C) 2%
(D) 2.5%

Answer
3.5%

In which of the following activities silicon carbide is used?
(A) Making cement and glass
(B) Disinfecting water of ponds
(C) Cutting very hard substances
(D) Making casts for statues

Answer
Cutting very hard substances

The property of a substance to absorb moisture from the air on exposure is called
(A) Osmosis
(B) Deliquescence
(C) Efflorescence
(D) Desiccation

Answer
Deliquescence

The gases used in different types of welding would include
(A) Oxygen and Hydroge
(B) Oxygen, Hydrogen, Acetylene and Nitrogen
(C) Oxygen, Acetylene and Argon
(D) Oxygen and Acetylene

Answer
Oxygen and Acetylene

Inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
(A) Argon
(B) Xenon
(C) Helium
(D) Krypton

Answer
Helium

Which of the following is used as a lubricant?
(A) Graphite
(B) Silica
(C) Iron Oxide
(D) Diamond

Answer
Graphite

Tetraethyl lead is used as
(A) Pain Killer
(B) Mosquito Repellent
(C) Fire Extinguisher
(D) Petrol Additive

Answer
Petrol Additive

The variety of coal in which the deposit contains recognizable traces of the original plant material is
(A) Bitumen
(B) Anthracite
(C) Lignite
(D) Peat

Answer
Peat

The hardest substance available on earth is
(A) Gold
(B) Iron
(C) Diamond
(D) Platinum

Answer
Diamond

Bromine is a
(A) Black Solid
(B) Red Liquid
(C) Colourless Gas
(D) Highly Inflammable Gas

Answer
Red Liquid

Which of the gas is not known as green house gas?
(A) Methane
(B) Nitrous oxide
(C) Carbon dioxide
(D) Hydrogen

Answer
Hydrogen

Quartz crystals normally used in quartz clocks etc. is chemically
(A) Silicon Dioxide
(B) Germanium Oxide
(C) A mixture of Germanium Oxide and Silicon dioxide
(D) Sodium Silicate

Answer
Silicon Dioxide

Washing soda is the common name for
(A) Sodium Carbonate
(B) Calcium Bicarbonate
(C) Sodium Bicarbonate
(D) Calcium Carbonate

Answer
Sodium Carbonate

The gas usually filled in the electric bulb is
(A) Nitrogen
(B) Hydrogen
(C) Carbon dioxide
(D) Oxygen

Answer
Nitrogen

Chemical formula for water is
(A) NaA1O2
(B) H2O
(C) Al2O3
(D) CaSiO3

Answer
H2O

Chemical formula for water is
(A) NaA1O2
(B) H2O
(C) Al2O3
(D) CaSiO3

Answer
H2O

Question 7. Which of the following metals forms an amalgam with other metals?
(A) Tin
(B) Mercury
(C) Lead
(D) Zinc

Answer
Mercury

Which of the following is used in pencils?
(A) Graphite
(B) Silicon
(C) Charcoal
(D) Phosphorous

Answer
Graphite

Photosynthesis in plants takes place faster in
(A) Yellow light
(B) Red light
(C) Darkness
(D) White light

Answer
White light

The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)
(A) Deffusion
(B) Osmosis
(C) Active transport
(D) None of these

Answer
Osmosis

Following possess bilateral symmetry as larva and radial symmetry as adult
(A) Chordata
(B) Hydra
(C) Echinodermata
(D) Hemichordata

Answer
Echinodermata

Mode of transmission of hepatitis A is
(A) Serum Faeco-oral
(B) Serum
(C) Faeco-oral
(D) Sexual contact

Answer
All of these

Gaseous exchange through the skin is known as ______________ respiration?
(A) Cuticular
(B) Cutaneous
(C) Skin
(D) Pulmonary

Answer
Cutaneous

Locomotion in diatoms is carried out with the help of
(A) Valve
(B) Raphe
(C) Pseudopodium
(D) Cilia or flagella

Answer
Raphe

_____is about 2.4 meter in length and comprising about two fifth of the small intestine?
(A) Duodenum
(B) Jejunum
(C) Ileum
(D) Caecum

Answer
Jejunum

By the addition of base in waterpH will be
(A) more than 7
(B) less than 7
(C) equal to 7
(D) no effect

Answer
more than 7

Which statement is wrong ?
(A) the amount of ozone layer is greater in the region close to the equator
(B) ozone acts as filter for UV radiations
(C) in the equatorial region it acts as pollutant
(D) CFCs play effective role in removing O3 in the stratosphere

Answer
the amount of ozone layer is greater in the region close to the equator

When enthalpy of reactants is higher than product then reaction will be
(A) endothermic
(B) spontaneous
(C) non-spontaneous
(D) exothermic

Answer
exothermic

Which one of the following is not a periodic property ?
(A) Melting point of elements
(B) Boiling point of elements
(C) Ionization energy of elements
(D) Coordination number of ions

Answer
Coordination number of ions

Water has maximum density at
(A) 0°C 4°C
(B) 100°C
(C) 2°C
(D) 4°C

Answer
4°C

Which of the solid does not contain covalent bond
(A) Copper
(B) Ice
(C) Diamond
(D) Graphite

Answer
Copper

Newspaper can be recycled again and again how many times ?
(A) 2
(B) 3
(C) 4
(D) 5

Answer
5

Quantum number which tells the energy of electron is
(A) n
(B) 1
(C) m
(D) s

Answer
n

Elements having high I.P values are
(A) Metals
(B) Non metals
(C) Liquids
(D) Solids

Answer
Non metals

In unsaturated hydrocarbons electrons favour
(A) less reactivity
(B) addition reactions
(C) substitution reactions
(D) None of these

Answer
addition reactions

Which one of following amino acid is neither acidic nor a basic in nature ?
(A) Lysine
(B) Histidine
(C) Proline
(D) Glutamic acid

Answer
Proline

The relationship between energy of a photon of light and its frequency is given by
(A) de-Broglie duel nature of matter
(B) Bohrs model
(C) Plancks Quantum theory
(D) Rutherfords atomic model

Answer
Plancks Quantum theory

Elements with similar chemical properties appear in the
(A) Same family
(B) Same period
(C) p block elements
(D) Right upper corner

Answer
Same family

The percentage of nitrogen in urea is
(A) 36%
(B) 46%
(C) 56%
(D) 66%

Answer
46%

Which of the following technique is used for the separation of insoluble particles from liquids ?
(A) Filtration
(B) Solvent extraction
(C) Crystallization
(D) Chromatography

Answer
Filtration

Phosphorous acid upon thermal decomposition yields phosphoric acid and
(A) Phosphine
(B) Phosphorus
(C) Water
(D) Phosphorus pentoxide

Answer
Phosphine

Which of the following does not contain phosphorus ?
(A) Yolk of egg
(B) Bone
(C) Nerves
(D) Steel

Answer
Steel

Biocatalytical proteins are
(A) Enzymes
(B) Substrate
(C) Lipids
(D) any of above

Answer
Enzymes

Number of moles in 1 kg of solvent is called
(A) normality
(B) molarity
(C) molality
(D) mole fraction

Answer
molality

Molecular ions are formed by passing
(A) High energy electron beam
(B) ? – particle
(C) X-rays
(D) All of the above

Answer
All of the above

In galvanic cell Zn acts as an anode so its value of standard reduction potential in comparison to coupled electrode would be
(A) greater
(B) lesser
(C) sum of reduction and oxidation potentials
(D) None of these

Answer
greater

Which of the following technique is simple and efficient to purify a substance
(A) Filtration
(B) Sublimation
(C) Crystallization
(D) Solvent extraction

Answer
Solvent extraction

Voltaic cell is a
(A) irreversible cell
(B) reversible cell
(C) alkaline cell
(D) All of the above

Answer
All of the above

In a group ionic radius ?
(A) Increases
(B) Decreases
(C) No change
(D) Variable trend

Answer
Increases

Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be
(A) 16 gmol-1
(B) 32 gmol-1
(C) 48 gmol-1
(D) 64 gmol-1

Answer
32 gmol-1

The complete reduction carboxylic acid results in the formation of
(A) Alkyne
(B) Alkene
(C) Alkane
(D) None of these

Answer
Alkane

The hydrolysis of Benzenetrizonide will yield three moles of
(A) Glyoxime
(B) Benzaldehyde
(C) Glycol
(D) Glyoxal

Answer
Glyoxal

The solution remaining after the formation of crystals is called
(A) Mother liquor
(B) Dilute solution
(C) Residue
(D) both A & B

Answer
Dilute solution

If internal energy of the system is increased
(A) Change in state of the system is increased
(B) Temperature of the ystem may rise
(C) Chemical reaction may take place
(D) All of the above

Answer
All of the above

Which of the following will be acidic
(A) propyne
(B) 1-butyne
(C) ethyne
(D) all of the above

Answer
all of the above

What is the order of kinetics in the SN1 mechanism ?
(A) Zero
(B) First
(C) Second
(D) Third

Answer
First

Non-stoichiometric compounds of transition elements are called
(A) hydrates
(B) hydrides
(C) binary compounds
(D) interstitial compounds

Answer
interstitial compounds

Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?
(A) 0.0002M HCI
(B) 0.2 mole of NaCI with 0.2 mole of HNO3
(C) 0.4 mole of CH3COOH with 0.4 mole of NaOH
(D) 0.4 mole of NH3 with 0.2 mole of HCI

Answer
0.4 mole of NH3 with 0.2 mole of HCI

Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield
(A) primary alcohol
(B) secondary alcohol
(C) tertiary alcohol
(D) dihydric alcohol

Answer
primary alcohol

The cooling of molten urea by air in the tower is called
(A) prilling
(B) evaporation
(C) condensation
(D) crystallization

Answer
prilling

Which of the following is the most suitable catalyst for ammonia synthesis ?
(A) Pt
(B) ZnO + Cr2O3
(C) Fe in fused mixture of Al2O3 + SiQ2 + MgO
(D) All of the above

Answer
Fe in fused mixture of Al2O3 + SiQ2 + MgO

The molecules of CO2 in dry ice form
(A) Ionic crystal
(B) Covalent crystal
(C) Molecular crystal
(D) Any type of crystal

Answer
Molecular crystal

Which one of the following statement is not correct about benzene ?
(A) On hydrogenation 208 KJ/mole is liberated
(B) C-H bond length in benzene is 1.09 A?
(C) Molecular mass of benzene is 78.108
(D) Resonance energy of benzene is 150.5 K Cal/mole

Answer
Resonance energy of benzene is 150.5 K Cal/mole

The spreading of fragrance or scent in air is due to_______________?
(A) Diffusion
(B) Effusion
(C) Attraction with air
(D) Low dsensity

Answer
Diffusion

Which of the following option is incorrect about gases ?
(A) All molecules move with same speed
(B) All molecules behave independently
(C) PV / RT = n
(D) All gases cannot be liquefied through Linds Method

Answer
All molecules move with same speed

What do we call to sudden expansion of plasma ?
(A) Avogadros law
(B) Grahams law of diffusion
(C) Joule Thompson effect
(D) Daltons law of partial pressure

Answer
Joule Thompson effect

Cannizaros reaction takes place through the transfer of ____________________ from complex anion?
(A) hydrogen ion
(B) hydride ion
(C) oxide ion
(D) methoxide ion

Answer
hydride ion

Isotopes differ in_________________?
(A) properties which depend upon mass
(B) chemical properties
(C) arrangement of electrons in orbitals
(D) All of them

Answer
properties which depend upon mass

Which of the following methods is used to estimate hydrogen in an organic compound ?
(A) Combustion method
(B) Dumas method
(C) Kjeldahls method
(D) All of them

Answer
Combustion method

The nucleus of an atom of every element will always contain____________________?
(A) neutrons
(B) protons and electrons
(C) protons and electrons
(D) protons and neutrons

Answer
protons and electrons

Dempsters mass spectrometer has number of zones / parts_________________?
(A) 4
(B) 5
(C) 7
(D) 8

Answer
5

All the following variables are used to describle gases except__________________?
(A) pressure
(B) volume
(C) moles
(D) density

Answer
density

Which of the following are isoelectronic species ?
(A) H+ H H-
(B) Li+ Na+ K+
(C) C1- Br- I
(D) F- Ne Na+

Answer
F- Ne Na+

Molecular ions are formed by passing______________________?
(A) High energy electron beam
(B) α – particle
(C) X-rays
(D) All of the above

Answer
All of the above

Which one is true about isotope ?
(A) Same number of neutrons
(B) Same mass number
(C) Same physical properties
(D) Same chemical properties

Answer
Same chemical properties

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