Chapter 9: Problem 7
State whether the following statements are true or false. Phosphorous is widely used in match industry due to its low ignition temperature.
Chapter 9: Problem 7
State whether the following statements are true or false. Phosphorous is widely used in match industry due to its low ignition temperature.
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Get started for freeFor the manufacture of glass, various steps are given below. Arrange the steps in a proper sequence. (a) melting of raw materials (b) adding cullet to raw materials (c) conversion of raw material to fine powder (d) annealing (5) refining (a) 12345 (b) 21354 (c) 32154 (f) 32154
The ions responsible for the bleaching action of bleaching powder and the ions responsible for loss of bleaching action of bleaching powder due to the storage for long time respectively are (a) \(\mathrm{Cl}^{-}, \mathrm{OCl}^{-}\) (b) \(\mathrm{OCl}^{-}, \mathrm{Cl}^{-}\) (c) \(\mathrm{OCl}^{-}, \mathrm{ClO}_{3}^{-}\) (d) \(\mathrm{Cl}^{-}, \mathrm{ClO}^{-}\)
Which of the following imparts purple colour to glass? (a) \(\mathrm{Cr}_{2} \mathrm{O}_{3}\) (b) \(\mathrm{AuCl}_{3}\) (c) \(\mathrm{Cu}_{2} \mathrm{O}\) (d) \(\mathrm{MnO}_{2}\)
Which of the following is not an ingredient of clinker cement? (a) calcium silicate (b) aluminium silicate (c) calcium aluminium silicate (d) gypsum
Which of the following substances is a compound fertilizer? (a) CAN (b) urea (c) Epsom salt (d) ammonium phosphate
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