Column I | Column II | ||
---|---|---|---|
(A) | Formation of cloud | (1) | Dissolution of salt |
(B) | Formation of acid rain | (2) | Flusting |
(C) | Corrosion of iron | (3) | Chemical change |
(D) | Physical process | (4) | Physical change |
`A → 4 , B →3 , C → 2 , D →1`
`A → 1 , B →2 , C → 3 , D →4`
`A → 1 , B →3 , C → 4 , D →2`
`A → 4 , B →2 , C → 3 , D →1`
I and II
II and Ill
Ill and IV
I and IV
I and II
II and Ill
Ill and IV
I, Ill and IV
I and II
II and Ill
I and Ill
Ill only
I and II
II and Ill
Ill and IV
I and IV
I and II
II and Ill
I and Ill
All of these
Both the statements are true and Statement II is the correct explanation of Statement I
Both the statements are true but Statement II is not the correct explanation of Statement I.
Statement I is true, but Statement II is false
Statement I is false, but Statement II is true.
Both the statements are true and Statement II is the correct explanation of Statement I
Both the statements are true but Statement II is not the correct explanation of Statement I.
Statement I is true, but Statement II is false
Statement I is false, but Statement II is true.
Both the statements are true and Statement II is the correct explanation of Statement I
Both the statements are true but Statement II is not the correct explanation of Statement I.
Statement I is true, but Statement II is false
Statement I is false, but Statement II is true.
I and II
II and Ill
I and Ill
Only I
I and II
II and Ill
I and Ill
All of these
physical change
reduction reaction
endothermic reaction
exothermic reaction
evolution of light and water
evolution of heat
absorption of heat
None of the above
a physical change
a chemical change
a physical or a chemical change
None of the above
extrinsic change
intrinsic change
physical change
chemical change
A wet towel dries in the sun
Lemon juice added to tea causing its colour to change
Hot air rises over a radiator
Coffee is brewed by passing steam through ground coffee
Distillation of sea (salty) water
Crystallisation of impure salt (`NaCl`)
Production of iodine (`1_2` ) from seaweeds
Sublimation of iodine `(I_2)`
Sodium chloride
Silica
Lead nitrate
Platinum wire
Evolution of light
Evolution or absorption of heat
Evolution of heat only
Absorption of heat only
Evaporation
Dissolution
Sublimation
Precipitation
Heating of iron to red hot
Magnetisation of iron piece
Rusting of iron rod
All of the above
Formation of curd
Burning of candle
Rusting of iron rod
Heating of copper wire by electricity
Oxidation
Reduction
Both (a) and (b)
None of these
Combustion of fuel
Electrolysis of acidified water
Oxidation reaction of cells at anode
Glowing of a platinum wire
Physical changes are temporary changes and can be reversed
During physical changes tile composition of constituents molecule changes.
Energy is absorbed or released during a physical change
Identity of tile substance is lost after tile physical change
A molecule of a compound has atoms of different elements
A compound cannot be separated into its constituent elements by physical methods of separation
A compound retains the physical properties of its constituent elements
The ratio of atoms of different elements in a compound is fixed
Both the statements are true and Statement II is the correct explanation of Statement I.
Both the statements are true but Statement II is not the correct explanation of Statement I.
Statement I is true but Statement II is false.
Statement I is false, but Statement II is true.
I and II
II and Ill
III and IV
All of the above
I and II
II and Ill
Ill and IV
I and IV
I and II
II and Ill
Ill and IV
I and IV
List I | List II | ||
---|---|---|---|
(A) | Bronze | (1) | Solution |
(B) | `CO_2` | (2) | Compound |
(C) | Mixture of oil and water | (2) | Heterogeneous mixture |
(D) | Mixture of water and alcohol | (4) | Solid solution |
`A → 4 , B →2 , C → 3 , D →1`
`A → 1 , B → 2 , C → 3 , D → 4`
`A → 2 , B → 1 , C → 4 , D → 3`
`A → 2 , B → 4 , C → 3 , D → 1`
germanium is a semi-conductor
steel is an alloy
graphite is an element
the fundamental unit in silicates is `Si_2O_3`
Rhombic sulphur
Marble
Diamond
Quick silver
methane
urea
formaldehyde
water
Glass
Water gas
CNG
Plaster of Paris
Dalton
Wohler
Kolbe
Berthelot
compound
mixture
element
alloy
`H_2O`
`SiO_2`
`Al_2O_3`
Air
it exists as solid, liquid or gas
it contains hydrogen and oxygen
it contains two different elements joined by chemical bonds
it can be split up into simpler substance by chemical means
mixture
compound
element
None of these
Air
Water
Mercury
Sodium chloride
List I (Element) I | List II (Symbol) | ||
---|---|---|---|
(A) | Thallium | (1) | Tm |
(B) | Thorium | (2) | TI |
(C) | Thulium | (3) | Tb |
(D) | Terbium | (4) | Th |
`A -> 2, B -> 4 , C -> 3, D -> 1`
`A → 2 , B → 4 , C → 1 , D → 3`
`A → 1 , B → 3 , C → 2 , D → 4`
`A → 4 , B → 2 , C → 1 , D → 3`
haemoglobin
chlorophyll
vitamin `B_(12)`
ascorbic acid
cast iron
pig iron
steel
wrought iron
alloys of alkali metals with other metals
colloids of metals
element having some properties of metals and non-metals
metals heavier than lead
Graphite
Glass
Brass
Steel
Air
Mercury
Milk
Cement
Pt
K
Zn
Pu
Aluminium
iron
Gold
Silver
nitrogen
oxygen
helium
carbon dioxide
Assertion : (A) Components of a mixture of red and blue inks can be separated by distributing the components between stationary and mobile phases in paper chromatography
Reason : (R) The coloured components of inks migrate at different rates because paper selectively retains different components according to the difference in their partition between the two phases
Assertion : (A) Simple distillation can help in separating a mixture of propan-1-ol (boiling point `97^0C`) and propanone (boiling point `56^0C`).
Reason : Liquids with a difference of more than `20^0` in their boiling points can be separated by simple distillation.
Column I | Column II | ||
---|---|---|---|
(A) | Two solids which have different solubilities in a solvent and which do not undergo reaction when dissolved in it | (1) | Steam distillation |
(B) | Liquid that decomposes at its boiling point | (2) | |
(C) | Steam volatile liquid | (3) | Simple distillation |
(D) | Two liquids which have boiling points close to each other | (4) | Distillation under reduced pressure |
(E) | two liquids with large difference in boiling points | (5) | Crystallisation |
(This question may have multiple correct answers)
distillation
crystallisation
distillation under reduced pressure
steam distillation
Column chromatography
Solvent extraction
Distillation
Thin layer chromatography
Both the statements are true and Statement II is the correct explanation of Statement I
Both the statements are true but Statement II is not the correct explanation of Statement I.
Statement I is true, but Statement II is false
Statement I is false, but Statement II is true.
Both the statements are true and Statement II is the correct explanation of Statement I
Both the statements are true but Statement II is not the correct explanation of Statement I.
Statement I is true, but Statement II is false
Statement I is false, but Statement II is true.
Corrosive sublimate
Calomel
`CuSO_4`
both (b) and (c).
Chloroform
carbon tetrachloride
carbon disulphide
All of the above
filtration
distillatior
evaporation
All of the above
homogeneous mixture
heterogeneous mixture
azeotropic mixture
None of the above
suspensions
true solut ons
homogeneous mixture
colloidal solution
lower boiling point is obtained first
higher boiling point is obtained first
higher molecular weight is obtained first
lowest melting point is obtained first
maximum adsorbed
minimum adsorbed
have maximum rate of diffusion
have the highest molecular weight
plant pigment
blue and red ink
o and p-nitrophenol
All of the above
I and II
II and Ill
I and Ill
All of these
distillation
crystallisation
chromatography
sublimation
fractional distillation
steam distillation
vacuum distillation
None of the above
sublimation
chromatography
crystallisation
evaporation
`MgCl_2+NaCl`
`HgCl_2+NaCl`
`AgCl+NaCl`
`BaCl_2+2NaCl`
lemon oil
sandal wood oil
aniline
All of the above
sublimation-dissolution filtration crystallisation
dissolution-filtration-crystallisation distillation
sublimation-evaporation-dissolution decomposition
dissolution-distillation-decompositionevaporation
Only Ill
I and Ill
Only IV
IV and I
simple distillation
vacuum distillation
steam distillation
None of the above
magnetic method
atmolysis
chromatography
None of the above
filtration
separating funnel
fractional crystallisation
fractional distillation
Assertion : (A) The temperature at which vapour pressure of a liquid is equal to the external pressure is called boiling temperature.
Reason : (R) At high altitude atmospheric pressure is high.
Assertion : (A) Three states of matter are the result of balance between intermolecular forces and thermal energy of the molecules
Reason : (R) Intermolecular forces tend to keep the molecules together but thermal energy of molecules tends to keep them apart.
Complete order of molecules
Complete disorder of molecules
Random motion of molecules
Fixed position of molecules
pressure increases
temperature decreases
pressure decreases
temperature increases
increases
decreases
rnay increase or decrease depending upon temperature of liquid
remains unchanged