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8801.

______ is usedforwhitewashing walls .

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SOLUTION :SLAKEDLIME
8802.

......... is used in black and white photography.

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SOLUTION :AGBR or AGCL
8803.

__________ is used for dental filling .

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SOLUTION :SILVER TIN AMALGAM
8804.

_______ is thesmallestparticleof anelementor compound .

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SOLUTION : MOLECULE
8805.

_________ is the scienceof extractingmetalsfrom oresand modifyigmetals into alloys.

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SOLUTION :METALLURGY
8806.

…………….. Is the process of reducing the roasted metallic oxide to metal

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SOLUTION : SMELTING
8807.

___________ is the process of purification of metal.

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SOLUTION :REFINING
8808.

__________ is the periodicproperty which is used to predictthe nature of bonding between atoms in a molecule.

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SOLUTION :ELECTRONEGATIVITY
8809.

Aluminium is the most abundant metal in the earth's crust.

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ANSWER :ALUMINIUM
8810.

__________ is the minimum energy requiredto removean electron from a gaseousatom in its ground stateto form a cations.

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SOLUTION :IONISATION ENERGY
8811.

_________ is the metal widely used for anodizing .

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SOLUTION :ALUMINIUM
8812.

………………….. Is the main principle behind in Hydraulic method .

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SOLUTION : SPECIFIC GRAVITY
8813.

________ is the longestperiod in the periodical table.

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SOLUTION :`6^(TH)`
8814.

………….. Is the longest period in the periodical table.

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SOLUTION :SIXTH PERIOD
8815.

________ is the gradual destruction of metals by chemicalor electrochemicalreaction with the environment .

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SOLUTION :CORROSION
8816.

______ is the first member of the homologous series of alkynes.

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SOLUTION :ETHYNE (or ACETYLENE )
8817.

.............. is the example of gas in liquid.

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SOLUTION :CARBON DIOXIDE DISSOLVED in WATER
8818.

_____ is the common name of sodium hydroxide.

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SOLUTION :CAUSTIC SODA
8819.

_____ is the best conductor of electricity.

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ANSWER :SILVER
8820.

_______ is silvery white metal.

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SOLUTION :ALUMINIUM
8821.

_________is in liquid state at room temperature.

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FLUORINE
CHLORINE
BROMINE
IODINE

SOLUTION :Bromine
8822.

________ is foundin Madurai and Dindugal.

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SOLUTION :TUNGSTEN
8823.

………………. Is defined as the slow and steady destruction of a metal by the environment

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SOLUTION : CORROSION
8824.

…………………. Is an ore of a aluminium and ……………..Is its mineral .

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SOLUTION :BAUXITE , CLAY
8825.

………………. Is an important metal to form amalgam.

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AG
Hg
Mg
AL

ANSWER :B
8826.

________ is also called ionisation enthalpy.

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SOLUTION :IONISATION ENERGY
8827.

_______ isalso calledas autoionization .

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SOLUTION :SELF IONIZATION
8828.

______ isa substancewhichincreases thereaction ratewithout being consumedin thereaction.

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SOLUTION :CATALYST
8829.

………… is a relative periodic property.

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ATOMIC radii
IONIC radii
electron AFFINITY
electronegativity

ANSWER :B
8830.

________ is a relative periodic property

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ATOMIC RADII
Ionic radii
ELECTRON affinity
ELECTRONEGATIVITY

Answer :D
8831.

……………… is a process of coating Zinc on iron sheets by using electric current .

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SOLUTION : GALVANIZATION
8832.

......... is a major component of biogas and CNG.

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SOLUTION :METHANE
8833.

__________ isa metal whichisnon-conductor.

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SOLUTION :TUNGSTEN
8834.

______ in temperature favours an endothermic reaction.

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ANSWER :INCREASE
8835.

{:(" i. Boron family",,"(a) Group 17"),("ii. Carbon family",,"(b) Group 16"),(" iii. Nitrogen family",,"(c) Group 13"),("iv. Chalogen family",,"(d) Group 15"),("v. Halogen family",,"(e) Group 14"):}

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SOLUTION :i-c, ii-e, iii-d, iv-b, v-a
8836.

{:(" i. Alkali metals",,"(a) Lanthanides & Actinides"),("ii. Alkaline earth metals",,"(b) Group 3-12"),("iii. Transition elements",,"(c) Group 2"),("iv. Inner transition elements",,"(d) Group 1"):}

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SOLUTION :i-d, ii-c, iii-b, iv-a
8837.

. Hematite is converted into iron by using the blast fumace . Which are the substances fed into the blast furnace along with the ore of iron ?

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ANSWER :Haemalite, COKE, LIME STONE
8838.

. Hematite is converted into iron by using the blast fumace . Which compound acts as the reducing agent in the blast furnace ?

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ANSWER :CARBON MONOXIDE
8839.

_________ group contains the members of halogen family .

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`17^(th)`
`15^(th)`
`18^(th)`
`16^(th)`

ANSWER :A
8840.

_________ group contains all gases at roomtemperature.

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SOLUTION :18 or ZERO
8841.

……… group contains the member of halogen family.

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17TH
15TH
18TH
16TH

ANSWER :A
8842.

…………. Forms the basis of modern periodic table.

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SOLUTION :ATOMIC NUMBER
8843.

- COOH is a functional group of……………..

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CARBOXYLIC ACIDS
ester
ether
aldehyde

ANSWER :A
8844.

{:("Column X ","Column Y "),("a. Petrol ","i. Heterogenous mixture "),("b. Graphite ","ii. Compound "),("c. Sucrose ","iii.Element "),("d. Milk ","iv. Hamogeneous mixture "),(,):}

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ANSWER : a.(IV), B.(III), C.(ii), d.(i)
8845.

{:("Column X ","Column Y "),("a. Molarity " ," i. For very dilute solution "),("b. Molality " ," ii. No units"),("c. mole fraction"," iii.Mol L"^(–1)),("d. ppm " ," iv. independent of temperature"):}

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Answer :a.(iii), B.(iv), C.(ii), d.(i)
8846.

{:("Column X ","Column Y "),("a. 8 g " CH_(4) ," i. 0.1 mol "),("b. 1.7 g NH"_(3) ," ii. 0.5 mol "),("c. HCHO "," iii.40% carbon "),("d. "C_(6)H_(12)O_(6) ," iv. Vapour density = 15"):}

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Answer :a.(II), B.(i), C.(iv), d.(iii)
8847.

{:("Column X ","Column Y "),("a. 40 g of He" ," i." 6.022xx10^(23)"atoms"),("b. 35 g of Li " ," ii. 10 atoms"),("c. 40 u of He"," iii." 6.022xx10^(24)"atoms"),("d. 16 g of "O_(2) ," iv." 3.011xx10^(24) "atoms"):}

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Answer :a.(iii), B.(iv), C.(II), d.(ii)
8848.

........ catalyst is used in hydrogenation of vegetable oils.

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SOLUTION :NICKEL (NI)
8849.

_____ basedon therelationshipbetweenthenumberof moleculespresentinequalvolumesof gasesin differentconditions.

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SOLUTION :AVOGADRO HYPOTHESIS
8850.

• Aspirin is an antipyretic. • Amoxicillin is an antibiotic Write any two unhealthy practices among people in using medicines.

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Answer :* Selftreatment.*Excessive USE of MEDICINE.*Using medicine PRESCRIBED for OTHERS.*Don’t taking medicine at REGULAR intervals.