CLASS 9 PRACTICALSKILLS

1] To determine the melting point of ice a student immersed the thermometer in thecrushed ice in a beaker. He then heated the beaker on a low flame and observed that during melting of ice the temperature :
A.   Is decreasing
B. Fist decreases and then continuously increases
C.  Is increasing
D. Remains constant Ö

2] In the mixture of iron filings and sulphur powder
A. both sulphur powder and iron filings gets attracted towards magnet
B.only sulphur powder gets attracted towards magnet
C.Neither iron filling nor sulphur gets attracted towards magnet.
D.only iron filings gets attracted towards magnet Ö

3] When a mixture of sulphur powder and iron filings is heated.
A. iron filings starts melting
B.sulphur sublimates leaving iron filling behind
C.sulphur melts
D. Ferrous sulphide is formed. Ö

4] A student added milk, white of an egg, common salt and sand separately to water kept in four separate beakers. He stirred the mixtures well and filtered each of them. On filtering, he obtained solid residue on the filter paper in case of :
A.    Milk
B.  White of an egg
C. Common salt
D.  Sand Ö

5] A student sets up an apparatus for determining the boiling point of water. He records the temperature after regular intervals and finds that water when it begins to boil:
A. Continuously rises
B.First remains constant and then rises
C.Remains constant
D.First rises and then becomes constant Ö