91. Which chemical is commonly used as a thickening agent in food products?
a) Corn starch
b) Xanthan gum
c) Carrageenan
d) Guar gum
Answer: b) Xanthan gum
92. Which Indian state is known for its production of fine chemicals and pharmaceutical intermediates?
a) Maharashtra
b) Gujarat
c) Telangana
d) Tamil Nadu
Answer: d) Tamil Nadu
93. Which chemical is commonly used as a cooling agent in refrigeration systems?
a) Ammonia
b) Carbon dioxide
c) Hydrochlorofluorocarbons (HCFCs)
d) Hydrofluorocarbons (HFCs)
Answer: a) Ammonia
94. Which petrochemical is used in the production of polyurethane foam?
a) Ethylene
b) Propylene
c) Toluene diisocyanate (TDI)
d) Benzene
Answer: c) Toluene diisocyanate (TDI)
95. Which chemical is commonly used as a descaling agent in household appliances?
a) Citric acid
b) Vinegar
c) Sulfuric acid
d) Hydrochloric acid
Answer: a) Citric acid
