Milk can be preserved by adding a few drops of?
1. Formic acid solution
2. Formaldehyde solution
3. Acetic acid solution
4. Acetaldehyde solution
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen a catalyst is added to a system the:
1. equilibrium concentrations are increased
2. equilibrium concentrations are unchanged
3. the rate of forward reaction is increased and that of backward reaction is decreases
4. value of the equilibrium constant is decreased
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyClouds, mist, fog and aerosols are colloidal solution of:
1. solid in a gas
2. gas in a solid
3. liquid in a gas
4. gas in a liquid
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat is the index for the Gold number?
1. Protective power of lyophilic colloid.
2. Purity of gold.
3. Metallic gold.
4. Electroplated gold.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology
Silver iodide is used for producing artificial rain because AgI is:
1. Easy to spray at high altitudes.
2. Easy to synthesize.
3. Having crystal structure similar to ice.
4. Insoluble in water.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich is an emulsion?
1. Boot polish
2. Lipstick
3. Shampoo
4. All of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyEgg albumin is:
1. reversible colloid
2. lyophilic colloid
3. protective colloid
4. all of these
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 & Biology