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Q741

Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ?

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Q742

Soap is prepared by boiling caustic soda with

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Q743

'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –

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Q744

Which of the following is not a donor atom?

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Q745

What happens when a chemical bond is formed ?

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Q746

Mark the compound which possess ionic, covalent and coordinate bonds.

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Q747

In ice, the number of hydrogen bonds per water molecule is

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Q748

Of the following compounds of calcium, the one having highest covalent character is

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Q749

Which one of the following species has the highest bond order, shortest bond length and maximum bond strength?

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Q750

The number of hydrogen bonds between guanine and cytosine in DNA is

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Q751

The structure of (HPO₃)₃ is

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Q752

Spontaneous change is one in which there is:

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Q753

Which of the following kinds of spectroscopy can provide information on the energy difference between the initial and final states rather the energy levels involved in the transition?

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Q754

When ice cubes are made, the entropy of water

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Q755

Warming ammonium chloride with sodium hydrochloride in a test tube is an example of

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Q756

For a spontaneous chemical process, the free energy change is

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Q757

When a bond is formed between two atoms, the energy of the system will

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Q758

The minimum energy required for an effective collision is

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Q759

Which of the following produces highest amount of energy upon oxidation?

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Q760

Which of the following has least negative electron gain enthalpy?

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