when two substances A and B are powered 12 and pastel and mortar a large amount of heat is evolved as a result in New substance is formed what is the nature of the new substance
Answers
Answer:
(a) When two substances are powdered together in mortar and pestle a large amount
of heat is evolved which shows that the new
substance is STABLE than A and B because
of which heat is produced.The substance will
be LESS REACTIVE than A and B
(b) We CANNOT separate the mixture of alcohol and water by use of separating
funnel because both are completly soluable
into each other due to HYDROGEN BONDING
they can be separated by DISTILLATION
in which alcohol has less boiling point(78.5C°)
than water(100C°) which distill earlier leaving
behind the water.
Answer:
Solution:-
Positive tropic movement in plants means the direction of movement of the plant towards the stimulus.
Examples:- (1) The plants are grown in light illuminating them from all directions grow more or less upwards.
(2) Roots growing towards the earth’s gravity.
Negative tropic movement in plants means the direction of movement of the plant away from the stimulus.
Examples:- (1) Growth of roots away from the light
(2) Roots growing away from the earth’s gravity.