Milk can be preserved by adding a few drops of:
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Explanation
(b) Formalin acts as preservative for milk.
NEET Practice Questions (MCQs) with Answers & Solutions
Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
When a catalyst is added to a system the:
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Explanation
(b) Catalyst never changes the equilibrium constant
Clouds, mist, fog and aerosols are colloidal solution of:
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Explanation
(c) All these are liquid aerosols systems, i.e., liquid dispersed in gas.
Gold number is the index for:
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Explanation
(a) it is a scale to represent protective power of lyophilic sols.
Silver iodide is used for producing artificial rain because AgI:
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Explanation
(c) Due to similar structure, the adsorption becomes more effective and the neutralization of charge coagulates clouds to bring in rain.
Which is an emulsion?
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Explanation
(d) Each one possesses two liquid phase, one dispersed in other; however they have low m.p.
Egg albumin is:
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Explanation
(d) egg albumin is organic sols and organic sols are usually lyophilic.
Which acts as a promoter for nickel in the hydrogenation of oils ?
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Explanation
Cu acts as a promoter for Ni.
the catalyst contains active component selected from the group of Cu, Cr, metals of group VIII in the amount of 0.001-1.0 wt.% on fiberglass media from amorphous fibers of silicon oxide and/or aluminum oxide, and optionally, a stabilizer consisting of a single component and/or mixtures thereof, selected from the group of boron, alkali or alkaline earth metal in an amount of 0.001-2.0 wt.% (in terms of element)
In Zeigler-Natta polymerisation of ethylene, the active species is:
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Explanation
Zeigler-Natta catalyst is formed by the action of (C2H5)3Al and TiCl4. the active species is (C2H5)3Al can reduce TiCl4 to TiCl3. TiIII has one active site vacant and thus accommodates one alkyl group
Which gas is adsorbed strongly by charcoal?
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Explanation
(d) Due to dipole and van der Waals' forces of attraction.
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