Top 1000+ Solved Chemistry MCQ Questions Answer
Q. Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful
a. solar ultraviolet radiation
b. solar infrared radiation
c. CO2 in the air
d. SO2 in the air
Q. The two metal ions that cause hardness to water are:
a. Calcium, Magnesium
b. Sodium, Calcium
c. Sodium, Potassium
d. Sodium, Magnesium
Q. The liquid waste from kitchens and baths, of residences is known as:
a. Domestic sewage
b. Storm water
c. Sullage
d. Refuse
Q. Which one of the following is an example of a gel?
a. Cheese
b. Milk
c. Face cream
d. Shaving cream
Q. Quartz is made of –
a. Calcium Sulphate
b. Calcium Silicate
c. Sodium Sulphate
d. Sodium Silicate
Q. Which among the following coal contains 90 per cent of carbon?
a. Anthracite
b. Bitumen
c. Lignite
d. Peat
Q. Eposure to mixtures of chemicals are greater than expected on the basis of effects of expo-sure to each chemical individually. This is known as –
a. Additives
b. Antagonism
c. Synergism
d. Independent
Q. The filter over which sewage is sprinkled is called as –
a. Trickling filter
b. Percolating filter
c. Contact bed
d. Intermittent sand filter
Q. Iodine value is used to estimate –
a. Hydroxyl groups in oil
b. Alkali, content in oil
c. Unsaturation in oil
d. Carboxylic groups in oil