Which of the following statement is incorrect about Hypo
(A) It is used in Estimation of lodine
(B) It is used to remove the unexposed AgBr from photographic films
(C) It contain ionic, covalent and coordinate covalent bonds
(D) It is used as antichlor

Sodium thiosulphate is used to remove the unexposed AgBr from photographic films by forming a complex. In this complex of silver, the coordination number of silver is:

Which of the following statements are correct? 1. A sigma bond is stronger than a pi bond 2. A covalent bond is stronger than a hydrrogen bond 3. HF is more polar than HCl 4. There is one electrovalent bond and three covalent bonds in methylene chloride Select the correct answer using the codes given below

which of the following statements about ozone are correct ? A. It is essential for breathing of living organisms B. It is used to disinfect water C.It absorbs ultraviolet rays D.Its proportion in air is about 3%

Which of the following statement is/are incorrect in the rock-salt structure if an ionic compounds ? (A) coordination number of cation is four where as that of anion is six. (B) coordination number of cation is six where as that of anion is four. (C) coordination number of each cation and anion is four. (D) coordination number of each cation and anion is six.

Which of the following statements are correct? A. In sedimentation principle of gravity is used. B. Decantation can be used to separate solid and liquid but only when solid is settled at bottom of container. C. Evaporation is used to obtain salt from solution of water and salt, D. In centrifugation liquid and solid is separated by using heat

Study the following statements about ozone : (a) It is essential for breathing of living organisms. (b) It is used to disinfect water. (c ) It absorbs ultraviolet rays. (d) Its proportion in air is about 3%. Which of these statements are correct ?

Which of the following is the incorrect use? (A) Glyptal - Lacquers (B) PVC - Rain coats (C) Nylon 6 6- Bristles for brushes (D) Bakelite - squeeze bottles