Question

Which of the following properties can affect dissolution of sugar in water? * 1 point a. Quantity of Sugar b. Temperature c. Type of water d. Amount of sugar dissolved 5.A solution is said to be _______ if it cannot dissolve more of the substance in it. * 1 point a. Saturated b. Unsaturated c. Homogeneous d. Hetrogenous 7.Air is a_______________ * 1 point a.Mixture b.Compound C.Pure substance D.None of these 9.Oil and water can be separated through * 1 point a. filter paper b.distillation c.evaporation d .separating funnel 3.Which technique is used to purify dirty water? * 1 point a. Centrifugation b. Evaporation c. Sedimentation d. Decantation 6.A mixture of salt, sand, oil and water is given ,which of these sequence can be used to separate salt * 1 point a. Decantation -> Filtration -> Evaporation b. Filtration -> Evaporation -> Condensation c. Filtration -> boiling ->Decantation d. None of the above 11.Baking of dough into bread is a kind of change * 1 point a. reversible b.irreversible c.both d.none of these 4.Four mixtures are given below * 1 point (i) Kidney beans and chick peas (ii) Pulses and rice (iii) Rice flakes and corn (iv) Potato wafers and biscuits Which of these can be separated by the method of winnowing? (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iii) (d) (iii) and (iv) 10.Shallow pits near the sea is called: * 1 point a.lagoons b. wells c. residue d.kits 12.Melting of butter is __________where as curdling of milk is ________change * 1 point a.irreversible and reversible b.reversible and irreversible C.both reversible d.none of these 14.Boojho’s sister broke a white dove, a symbol of peace, made of Plaster of Paris (POP). Boojho tried to reconstruct the toy by making a powder of the broken pieces and then making a paste by mixing water. Will he be successful in his effort? * 1 point a.Boojho will not be successful because making of toy from Plaster of Paris (POP) is a change that cannot be reversed.1 b.Boojho will be successful because making of toy from Plaster of Paris (POP) is a change that cannot be reversed. c.Plaster of paris is a reversible change d.None of these 8. The solids left on the filter paper after filtration is known as * 1 point a.Filtrate b.Residue c.Mud D.Filteration 15.Conversion of ice into water and water into ice is an example of change which can be reversed. * 1 point a.True b.false 1.Husk is separated from heavier seeds of grain * 1 point a. winnowing b. Hand picking c. sieving d. None of these 13.Which of the following changes can be reversed? * 1 point a. Raw egg to boiled egg b. Wet clothes to dry clothes c.Bud to flower d. Cow dung to biogas

Answer 1

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