Advertisements
Advertisements
Question
What is meant by saying that metals are lustrous ?
Advertisements
Solution
Metals are said to be lustrous because of their property to shine.
APPEARS IN
RELATED QUESTIONS
Fill in the blank :
The substances which can flow are called ________
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
Explain why steel is used to make railway lines.
During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :
Name a liquid which can be classified as a pure substance and conducts electricity.
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
How would you confirm that a colourless liquid given to your is pure water ?
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.
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the individual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can, however, be divided by electrolysis into two substances which belong to the same class of substances as Y.
- What type of substance could X be ? Name one substance like X.
- What type of substance could Y be ? Name one substance like Y.
- What type of substance could Z be ? Name one substance like Z.
- Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z ?
- Name the three groups into which all the substances like Y are divided on the basis of their properties.
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
Define solubility of a substance. How does it vary with temperature ?
One of the following does not show Tyndall effect. This one is :
Fill in the following blanks with suitable words :
A mixture of kerosene and petrol can be separated by .....................
The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolves in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.
(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and (ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
Which among the following is not a matter?
Solids possess very high kinetic energy.
Gases do not diffuse very easily.
Define the term matter.
