Advertisements
Advertisements
प्रश्न
Name the process by which all the dye can be recovered from black ink.
Advertisements
उत्तर
The process of evaporation can be used to recover all the dye from black ink.
APPEARS IN
संबंधित प्रश्न
Fill in the blank :
The state of matter with definite volume and definite shape is called______
What are the two conditions for the interconversion of states of matter ?
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
The three important metalloids are.............................. and ..........................
State any two properties for believing that aluminium is a metal.
Name a metal which can be easily cut with a knife.
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
Explain what happens when a beam of light is passed through a colloidal solution.
How will you separate a mixture of iron filings and powdered carbon ?
How will you separate water from mustard oil ?
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
______ is not made of matter.
Name the metals that are used in jewellery.
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Liquids have ______.
Gases do not diffuse very easily.
Define the term matter.
Define the term matter.
