Question

64. Which of the following is most suitable for summer?
y Cotton
2) Nylon
3) Polyester
4) Silk
The colour of vapours formed on sublimation of iodine solid is
1) Purple (violet) 2) Colourless
3) Yellow
4) Orange
Which of the following is not endothermic process?
1) Fusion
2) Vapourisation 3) Temperature 4) Insoluble heavy impurities
1 carat of diamond is equal to
1) 200 mg
2) 200 g
3) 100 mg
4) 100 g
Which of the following does not affect rate of evaporation?
1) Wind speed 2) Surface area 3) Temperature 4) Insoluble heavy impurities
Kinetic energy of molecules is directly proportional to
1) Temperature 2 ) Pressure
3) Both 1 and 2 4) Atmospheric pressure
The components of water can be separated by
1)Physical methods 2) Chemical methods 3) Both 1&2 4)They can't be separated
Mixture can be
1) homogeneous 2) heterogeneous 3) Both 1 and 2 4) pure substance
Brass is a
1) Compound
2) Element
3) Homogeneous mixture 4) Heterogeneous mixture
73. In sugar solution
1) Sugar is solute, water is solvent
2) Sugar is solvent, water is solute
3) Both are solutes
4) Both are solvents
74. Brass is a solution of molten copper in
1) solid zinc
2) molten zinc 3) gaseous zinc 4) molten tin
75. Graphite & Diamond are
of carbon
1) Allotropes
2) Isomers
3) Homologues 4) none of these
72.
... Pap.ends....
Dear Parent​

Answer 1

Answer:

well, cotton is most suitable for summer, I think Violet vaprs formed while sublimation of iodine,temperature is not endothermic process, 200mg, insoluble heavy impurities, 3 ) both 1&2, 4) can't be seperate, 3) both1&2, compound, brass is a compound, 1 sugar is solute water is solvent, molten zinc, allotropes of carbon