A. I, II, III and IV
B. I, III and IV
C. I, II and IV
D. I and IV
Which one of the following noble gases is used in miner's cap lamps
Which of the following is not a peroxy acid
Calorific value of producer gas is low because of
Which of the following is used for making optical instruments ?
CFCl<sub>3</sub> is responsible for the decomposition of ozone to oxygen. Which of the following reacts with ozone to form oxygen ?
What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr ?
Observe the following statements :<br><br>I. Bleaching powder is used in the preparation of chloroform.<br>II. Bleaching powder decomposes in the presence ofCoCl2 to liberate 02.<br>III.Aqueous KHF<sub>2</sub> is used in the preparation of fluorine.<br>The correct combination is :
Hydrolysis of NCI<sub>3</sub> gives NH<sub>3</sub> and X. Which of the following is X ?
Fluorine reacts with dilute NaOH and forms a gaseous product A. The bond angle in the molecule of A is
The type of bonds present in sulphuric anhydride