A. high percent of N2
B. low percent of CO2
C. high percent of CO
D. low percent of N2
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
Which pair of oxyacids of phosphorous contain ‘P - H\' bonds
SiCl<sub>4</sub> on hydrolysis forms X and HCI. Compound X loses water at 1000<sup>o</sup>C and gives Y. Compounds X and Y respectively are <br>
Aluminium reacts with NaOH and forms compound X. If the coordination number of aluminium in X is 6, the correct formula of X