Question

2) Salt is acidic..
B) Write answers in one sentence. (Any Six)
1) In which unit large distances are measured?
2) What is ecosystem?
3) State the proporties of glass.
4) What is the unit of frequency?
5) Write the sources of heat
6) Which salts are dissolved in hard water?
7) Write chemical names from given formulae
(a) H,SO. (b) KOH
on Writetyn points each) (Amyo​

Answer 1

Answer:

1:Kilometer

Kilometer is the unit used to measure large distances on earth. Explanation: Kilometer is the unit which is used to measure the large distances.

2:An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. These biotic and abiotic components are linked together through nutrient cycles and energy flows.

3:The main characteristics of glass are transparency, heat resistance, pressure and breakage resistance and chemical resistance. The surface of glass is affected if it is exposed for a long time to alkalis (and ammonia gases in damp air) in conjunction with high temperatures.

4:The SI unit for frequency is the hertz (Hz). One hertz is the same as one cycle per second.

6:Hard water, water that contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous iron may also be present; oxidized to the ferric form, it appears as a reddish brown stain on washed fabrics and enameled surfaces.

7:We are given some chemical formulas of compounds and we are to write their complete chemical names.

⇒ Sulphuric Acid (2 Hydrogen atoms, one Sulfur atom and 4 oxygen atoms)

⇒ Calcium hydroxide.

⇒ Hydrogen Chloride.

⇒ Sodium Hydroxide.

⇒ Potassium Hydroxide.

⇒ Ammonium Hydroxide.