Question

3. Methyl orange indicator gives red color with ( ) a) Citric acid b) Oxalic acid c) Formic acid d) All the above 4. Industrial waste gases contain () a) Sulphur dioxide b) Nitrogen oxide c) Carbon di oxide d) All the above 5. Acids and bases on chemical combination gives) a) Salt b) water c) Both a and b d) Acids 6. Acids are in taste a) Sour b) Bitter c) Sweet d) Spice 7. Which gas does not have colour () a) Hydrogen gas b) Oxygen gas c) Chlorine gas d) Nitrogen gas 8. Phenolphthalein indicator is colourless in medium and pink colour in medium () a) Basic, acidic b) Acidic, basic c) Acidic, Acidic d) Basic, Basic 9. One of the example of neutral salts ( ) a) Sodium chloride b) Copper sulphate c) Sodium acetate d) None of these 10.The gas which escape out from many aerated soft drinks is( ) a)SO2 b)O2 c)CO2 d)None​

Answer 1

Answer:

3-d

Explanation:

because of indicators

Answer 2

Answer:

Photography is the art, application, and practice of creating durable images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.