The active species in Zeigler-Natta polymerisation of ethylene is:
1. AlCl3
2. Et3Al
3. H2C=CH2
4. Ti+3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe gas that is adsorbed strongly by charcoal is:
1. CO2
2. N2
3. H2
4. NH3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA small amount of phosphoric acid can be used to prevent H2O2 decomposition. This an example of?
1. Neutralization
2. Negative catalysis
3. Positive catalysis
4. Catalytic poisoning
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich ion is adsorbed when a diluted aqueous solution of AgNO3 (excess) is added to KI solution, resulting in formation of positively charged sol particles of AgI?
1. K+
2. Ag+
3. I-
4. NO3-
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMilk contains a protein that is very good for health. The protein is:
1. caffeine
2. calciferol
3. keratin
4. casein
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyEmulsions of polyvinylacetate are used in:
1. polishes
2. latex paints
3. fire works
4. rayons
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat is the simultaneous outcome of internal liquid from gels called?
1. Synerisis
2. Thixotropy
3. Swelling
4. None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe charge on As2S3 sol is caused by the adsorption of:
1. H+
2. OH-
3.
4. S2-
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPd can adsorb 900 times its volume of hydrogen. This called:
1. Absorption
2. Adsorption
3. Occlusion
4. Both 2, and 3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe Brownian motion is due to:
(1)temperature fluctuations within the liquid phase
(2)attraction and repulsion between charges on the colloidal particles
(3)impact of the molecules of the dispersion medium on the colloidal particles
(4)convective currents
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology