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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
Actinides are the elements with atomic numbers from
(A) 97 to 104
(B) 101 to 115
(C) 89 to 103
(D) 36 from 43
What is laughing gas?
(A) Nitrous Oxide
(B) Carbon monoxide
(C) Hydrogen peroxide
(D) Sulphur dioxide
From which mineral is radium obtained?
(A) Rutile
(B) Haematite
(C) Limestone
(D) 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
Sodium metal is kept under
(A) Petrol
(B) Alcohol
(C) Water
(D) Kerosene
Which of the following is in liquid form at room temperature?
(A) Lithium
(B) Sodium
(C) Francium
(D) Cerium
Which of the following was to be discovered first in the chromospheres of the sun?
(A) Krypton
(B) Xenon
(C) Neon
(D) Helium
Most soluble in water is
(A) Camphor
(B) Sulphur
(C) Common salt
(D) Sugar
The most important ore of aluminum is
(A) Galena
(B) Calamine
(C) Calcite
(D) Bauxite
Soda water contains
(A) Carbonic acid
(B) Sulphuric acid
(C) Carbon dioxide
(D) Nitrous acid
Permanent hardness of water may be removed by the addition of
(A) Sodium Carbonate
(B) Alum
(C) Potassium Permanganate
(D) Lime
Potassium nitrate is used in
(A) Medicine
(B) Fertilizer
(C) Glass
(D) Salt
Carbon, diamond and graphite are together called
(A) Allotrope
(B) Isomers
(C) Isomorphs
(D) Isotopes
Monazite is an ore of
(A) Zirconium
(B) Titanium
(C) Iron
(D) Thorium
Non stick cooking utensils are coated with
(A) Black paint
(B) PVC
(C) Teflon
(D) polystyrene
The element common to all acids is
(A) Hydrogen
(B) Carbon
(C) Sulphur
(D) Oxygen
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
The average salinity of sea water is
(A) 3%
(B) 3.5%
(C) 2%
(D) 2.5%
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
The property of a substance to absorb moisture from the air on exposure is called
(A) Osmosis
(B) Deliquescence
(C) Efflorescence
(D) Desiccation
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
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
Which of the following is used as a lubricant?
(A) Graphite
(B) Silica
(C) Iron Oxide
(D) Diamond
Tetraethyl lead is used as
(A) Pain Killer
(B) Mosquito Repellent
(C) Fire Extinguisher
(D) 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
The hardest substance available on earth is
(A) Gold
(B) Iron
(C) Diamond
(D) Platinum
Bromine is a
(A) Black Solid
(B) Red Liquid
(C) Colourless Gas
(D) Highly Inflammable Gas
Which of the gas is not known as green house gas?
(A) Methane
(B) Nitrous oxide
(C) Carbon dioxide
(D) 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
Washing soda is the common name for
(A) Sodium Carbonate
(B) Calcium Bicarbonate
(C) Sodium Bicarbonate
(D) Calcium Carbonate
The gas usually filled in the electric bulb is
(A) Nitrogen
(B) Hydrogen
(C) Carbon dioxide
(D) Oxygen
Chemical formula for water is
(A) NaA1O2
(B) H2O
(C) Al2O3
(D) CaSiO3
Chemical formula for water is
(A) NaA1O2
(B) H2O
(C) Al2O3
(D) CaSiO3
Question 7. Which of the following metals forms an amalgam with other metals?
(A) Tin
(B) Mercury
(C) Lead
(D) Zinc
Which of the following is used in pencils?
(A) Graphite
(B) Silicon
(C) Charcoal
(D) Phosphorous
Photosynthesis in plants takes place faster in
(A) Yellow light
(B) Red light
(C) Darkness
(D) 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
Following possess bilateral symmetry as larva and radial symmetry as adult
(A) Chordata
(B) Hydra
(C) Echinodermata
(D) Hemichordata
Mode of transmission of hepatitis A is
(A) Serum Faeco-oral
(B) Serum
(C) Faeco-oral
(D) Sexual contact
Gaseous exchange through the skin is known as ______________ respiration?
(A) Cuticular
(B) Cutaneous
(C) Skin
(D) Pulmonary
Locomotion in diatoms is carried out with the help of
(A) Valve
(B) Raphe
(C) Pseudopodium
(D) Cilia or flagella
_____is about 2.4 meter in length and comprising about two fifth of the small intestine?
(A) Duodenum
(B) Jejunum
(C) Ileum
(D) Caecum
By the addition of base in waterpH will be
(A) more than 7
(B) less than 7
(C) equal to 7
(D) no effect
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
When enthalpy of reactants is higher than product then reaction will be
(A) endothermic
(B) spontaneous
(C) non-spontaneous
(D) 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
Water has maximum density at
(A) 0°C 4°C
(B) 100°C
(C) 2°C
(D) 4°C
Which of the solid does not contain covalent bond
(A) Copper
(B) Ice
(C) Diamond
(D) Graphite
Newspaper can be recycled again and again how many times ?
(A) 2
(B) 3
(C) 4
(D) 5
Quantum number which tells the energy of electron is
(A) n
(B) 1
(C) m
(D) s
Elements having high I.P values are
(A) Metals
(B) Non metals
(C) Liquids
(D) Solids
In unsaturated hydrocarbons electrons favour
(A) less reactivity
(B) addition reactions
(C) substitution reactions
(D) None of these
Which one of following amino acid is neither acidic nor a basic in nature ?
(A) Lysine
(B) Histidine
(C) Proline
(D) Glutamic acid
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
Elements with similar chemical properties appear in the
(A) Same family
(B) Same period
(C) p block elements
(D) Right upper corner
The percentage of nitrogen in urea is
(A) 36%
(B) 46%
(C) 56%
(D) 66%
Which of the following technique is used for the separation of insoluble particles from liquids ?
(A) Filtration
(B) Solvent extraction
(C) Crystallization
(D) Chromatography
Phosphorous acid upon thermal decomposition yields phosphoric acid and
(A) Phosphine
(B) Phosphorus
(C) Water
(D) Phosphorus pentoxide
Which of the following does not contain phosphorus ?
(A) Yolk of egg
(B) Bone
(C) Nerves
(D) Steel
Biocatalytical proteins are
(A) Enzymes
(B) Substrate
(C) Lipids
(D) any of above
Number of moles in 1 kg of solvent is called
(A) normality
(B) molarity
(C) molality
(D) mole fraction
Molecular ions are formed by passing
(A) High energy electron beam
(B) ? – particle
(C) X-rays
(D) 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
Which of the following technique is simple and efficient to purify a substance
(A) Filtration
(B) Sublimation
(C) Crystallization
(D) Solvent extraction
Voltaic cell is a
(A) irreversible cell
(B) reversible cell
(C) alkaline cell
(D) All of the above
In a group ionic radius ?
(A) Increases
(B) Decreases
(C) No change
(D) Variable trend
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
The complete reduction carboxylic acid results in the formation of
(A) Alkyne
(B) Alkene
(C) Alkane
(D) None of these
The hydrolysis of Benzenetrizonide will yield three moles of
(A) Glyoxime
(B) Benzaldehyde
(C) Glycol
(D) Glyoxal
The solution remaining after the formation of crystals is called
(A) Mother liquor
(B) Dilute solution
(C) Residue
(D) both A & B
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
Which of the following will be acidic
(A) propyne
(B) 1-butyne
(C) ethyne
(D) all of the above
What is the order of kinetics in the SN1 mechanism ?
(A) Zero
(B) First
(C) Second
(D) Third
Non-stoichiometric compounds of transition elements are called
(A) hydrates
(B) hydrides
(C) binary compounds
(D) 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
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield
(A) primary alcohol
(B) secondary alcohol
(C) tertiary alcohol
(D) dihydric alcohol
The cooling of molten urea by air in the tower is called
(A) prilling
(B) evaporation
(C) condensation
(D) crystallization
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
The molecules of CO2 in dry ice form
(A) Ionic crystal
(B) Covalent crystal
(C) Molecular crystal
(D) Any type of 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
The spreading of fragrance or scent in air is due to_______________?
(A) Diffusion
(B) Effusion
(C) Attraction with air
(D) Low dsensity
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
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
Cannizaros reaction takes place through the transfer of ____________________ from complex anion?
(A) hydrogen ion
(B) hydride ion
(C) oxide ion
(D) methoxide ion
Isotopes differ in_________________?
(A) properties which depend upon mass
(B) chemical properties
(C) arrangement of electrons in orbitals
(D) All of them
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
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
Dempsters mass spectrometer has number of zones / parts_________________?
(A) 4
(B) 5
(C) 7
(D) 8
All the following variables are used to describle gases except__________________?
(A) pressure
(B) volume
(C) moles
(D) density
Which of the following are isoelectronic species ?
(A) H+ H H-
(B) Li+ Na+ K+
(C) C1- Br- I
(D) 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
Which one is true about isotope ?
(A) Same number of neutrons
(B) Same mass number
(C) Same physical properties
(D) Same chemical properties