Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions

A crystalline solid ____________.

Which of the following is not a crystalline solid?

Which of the following statements about amorphous solids is incorrect?

Which of the following is an amorphous solid?

Which of the following statement is not true about amorphous solids?

The sharp melting point of crystalline solids is due to ______.

Why some glass objects from ancient civilisations are found to become milky in appearance?

Which of the following amorphous solid is used as photovoltaic material for conversion of sunlight into electricity?

Which of the following statement is incorrect for group 15 elements?

What causes nitrogen to be chemically inert?

Nitrogen dioxide cannot be obtained by heating:

When two halogen atoms are attached to the same carbon atom then it is:

Acid catalyzed hydration of alkenes except ethene leads to the formation of ____________.

Which of the following is an example of unsymmetrical ether?

Which of the following gives a positive Fehling solution test?

Glucose gives silver mirror test with Tollen’s reagent. It shows the presence of ____________.

The two functional groups present in a typical carbohydrate are:

Which of the following monosaccharide is pentose?

Monosaccharides usually contains ____________ carbon atoms.

A carbohydrate that cannot be hydrolysed into simpler units is called ____________.