Advertisements
Advertisements
प्रश्न
Which of the following are compounds ?
- CO
- No
- NO
- Co
विकल्प
(i) and (ii)
(ii) and (iii)
(i) and (iii)
(i) and (iii)
(ii) and (iv)
Advertisements
उत्तर
(i) and (iii)
CO and NO are compounds. While CO is made up of carbon and oxygen, NO is made up of nitrogen and oxygen.
APPEARS IN
संबंधित प्रश्न
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
Honey is more viscous than water. Can you suggest why?
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
Name the different types of solutions. Give one example of each.
Define solubility of a substance. How does it vary with temperature ?
State whether the following statement are true or false :
Salt and water can be recovered from an aqueous salt solution by the process of evaporation.
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
Explain how, nitrogen , oxygen and argon gases are separated from air.
The material which is added to water during purification process at the water works so as to disinfect it is :
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
The best way to recover sugar from an aqueous sugar solution is :
Stars including Sun are covered in ______.
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which exists as a liquid at room temperature.
Solid is an arrangement of particles ______.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
Define the term matter.
