Which of the following is not a macromolecule ?
Which of the following is not a macromolecule ?
A. sand
B. haemoglobin
C. diamond
D. maltose
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Which of the following element has the maximum electron affinity_____?
Which of the following element has the maximum electron affinity_____?A. Cl
B. Br
C. I
D. FWhich of the following will decompose to produce litharge_________________?
Which of the following will decompose to produce litharge_________________?A. Pb2O
B. Pb3O4
C. PbO2
D. All of the aboveWhich of the following air pollutants is more dangerous for ozone layer ?
Which of the following air pollutants is more dangerous for ozone layer ?A. CFC
B. CO2
C. CO
D. Oxides of nitrogenFruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ?
Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ?A. aluminium can be recycled
B. aluminium has very low density
C. aluminium is the most abundant metal in the earth crust
D. aluminium is resistant to corrosion by organic acids.Which one exhibits aldol condensation____________________?
Which one exhibits aldol condensation____________________?A. HCHO
B. C6H5CHO
C. Cl3CCHO
D. CH3COCH3The rectified spirit contains________________?
The rectified spirit contains________________?A. 12% alcohol
B. 90% alcohol
C. 95% alcohol
D. 100% alcohol