Q.1: The mixture in which the constituents are uniformly distributed and each part of the mixture has the same properties, is known as _________________ mixture.
Q.2: The substances which are mixed to form a mixture are called ____________.
Q.3: Which of the following is an example of heterogeneous mixture ?
a) sugar and water solution
b) salt and water solution
c) oil and water solution
Q.4: Which of the following statements are correct regarding the separation of mixtures ?
i) To obtain useful components.
ii) To remove useful components.
iii) To remove impurities.
a) i and ii
b) i and iii
c) i, ii and iii
Q.5: _______________ means to take out by hand.
Q.6: Threshing can be done by a machine called __________.
c) lawn mower
Q.7: If Neha needs to separate grains from a mixture of grains and husk, then which method of separation she would use ?
Q.8: Two immiscible liquids can be separated from their mixture using ________________.
a) Liebig’s condenser
b) distillation flask
c) separating funnel
Q.9: In loading, ___________ is added to increase the rate of sedimentation.
Q.10: Insoluble substances that are heavier than liquid can be separated by ___________.
Q.11: ______________ are the heavy, insoluble settled particles at the bottom of the liquid.
Q.12: Water that we get from waterworks can be made absolutely safe for drinking by using an ____________________.
a) electric water filter
b) electric motor
c) electric ultraviolet water filter
Q.13: _________________ is used by farmers to separate heavier and lighter components of a mixture by wind.
Q.14: A ____________ is a shallow vessel with small holes.
a) filter paper
Q.15: Which of the following is insoluble in water ?
b) chalk powder
Q.16: The space between the particles is known as _____________ space.
Q.17: ______________ can be used to separate components of a mixture of different sizes.
Q.18: We get salt from sea water by the method of ______________.
Q.19: Mixture of gases is an example of _____________ mixture.
Q.20: The unwanted particles left behind in the filter paper, in the filtration process, is known as ___________.