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प्रश्न
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
उत्तर
Any matter which has a definite volume but no definite shape is called a liquid.
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संबंधित प्रश्न
Which one is a kind of matter:
State two characteristics of matter demonstrated by Brownian motion.
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
The element which is not common between the compounds called baking soda and soda ash is
Which of the following does not have a fixed melting point/boiling point ?
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
What is meant by the concentration of a solution ?
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
What do you understand by the statement " the solubility of copper sulphate in water at 20°C is 20.7 g" ?
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
One of the following does not show Tyndall effect. This one is :
Name the process which is used in milk dairies to separate cream from milk.
Name the process by which common salt is obtained from sea-water.
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Which method is better for recovering sugar from sugar solution : evaporation or crystallisation ? Give reason
for your answer.
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
Atoms or groups of atoms having a charge are called ______.
Gas-solid is ______.
