Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?

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#Question id: 15726

#Section 6: Plant, Animal and Microbial Biotechnology

Tissues and cells cultured in a liquid medium produce culture of single cells and cells clumps of few to many cells

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#Question id: 3034

#Section 2: General Biology

Cyanobacteria are

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#Question id: 15944

#Section 1: Engineering Mathematics

Consider the following in respect of two non-singular matrices A and B of same order:

a. Det (A+ B) = det A + det B

b. (A + B)^-1 = A^-1 + B^-1 

Which of the above is/are correct?

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#Question id: 16783

#Section 1: Engineering Mathematics

The range of the data 14, 6, 12, 17, 21, 10, 4, 3 is

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#Question id: 10155

#Section 2: General Biology

Which of the following components carries out oxygen cycle and also produces hydrogen per oxide ?