For Na+, Mg2+, F- and O2-; the correct order of increasing ionic radii is :
Chemistryhydrogen2018medium
Hydrogen peroxide oxidises [Fe(CN)6]4- to [Fe(CN)6]3- in acidic medium but reduces [Fe(CN)6]3- to [Fe(CN)6]4- in alkaline medium. The other products formed are, respectively :
Chemistrysolid-state2018easy
Which type of ‘defect’ has the presence of cations in the interstitial sites?
Chemistrysolid-state2018easy
All of the following share the same crystal structure except :
Chemistrysolid-state2018easy
Which of the following arrangements shows the schematic alignment of magnetic moments of antiferromagnetic substance ?
For a first order reaction, A → P, t1/2 (half-life) is 10 days The time required for {1 \over 4}th conversion of A (in days) is : (ln 2 = 0.693, ln 3 = 1.1)
N2O5 decomposes to NO2 and O2 and follows first order kinetics. After 50 minutes, the pressure inside the vessel increases from 50 mmHg to 87.5 mmHg. The pressure of the gaseous mixture after 100 minute at constant temperature will be :
At 518oC the rate of decomposition of a sample of gaseous acetaldehyde initially at a pressure of 363 Torr,
was 1.00 Torr s–1 when 5% had reacted and 0.5 Torr s–1 when 33% had reacted. The order of the reaction is
Chemistrysurface-chemistry2018easy
Which one of the following is not a property of physical adsorption?
Chemistrysurface-chemistry2018easy
If x gram of gas is adsorbed by m gram of adsorbent at pressure P, the plot of log {x \over m} versus log P is linear. The slope of the plot is :
(n and k are constants and n > 1)
Chemistrysurface-chemistry2018medium
Which of the following statements about colloids is False ?
Chemistryalcohols-phenols-and-ethers2018medium
Phenol reacts with methyl chloroformate in the presence of NaOH to form product A. A reacts with Br2 to
form product B. A and B are respectively :
Chemistryalcohols-phenols-and-ethers2018medium
The major product formed in the following reaction is :
Chemistryalcohols-phenols-and-ethers2018easy
The total number of optically active compounds formed in the following reactio is :