Which one of the following statements is not correct?
Physical adsorption decreases with increase in the temperature
Physical adsorption is multtlayered
Activation energy of physical adsorption is very high
Enthalpy change of physical adsorption is about 20 kJ mol
Which one of the following is a correct pair with respect to molecular formula of xenon compound and hybridization state of xenon in it?
XeF4, sp3
XeF2, sp
XeF2, sp3d
XeF4, sp2
When bauxite powder is mixed with coke and reacted with nitrogen at 2075 K, carbon monoxide and X are formed. What is the gas formed when X is reacted with water?
NH3
N2
N2O
O2
Fluorosis disease is caused due to the reaction of with excess of fluoride in the body.
Ca
Mg
Fe
K
0.066 g of metal was deposited when a current of 2 ampere is passed through a metal ion solution for 100 seconds. What is the electrochemical equivalent (in gram coulomb-1) of the metal ?
3.3 × 10-6
3.3 × 10-4
0.033
3.3
10 g of a radioactive element is disintegrated to 1 g in 2.303 minutes.What is the half-life (in minutes) of that radioactive element?
1/ 0.693
6.93
1
0.693
In the following reaction, X and Y are respectively
CH3COOH + NH3 → X Y + H2O
CH3CONH2, CH4
CH3COONH4, CH3CONH2
CH3CONH2, CH3COOH
CH3NH2, CH3CONH2
Which one of the following is the molecular formula of a tertiary amine ?
C2H7N
C3H9N
CH5N
CH3N
B.
C3H9N
C3H9N is the molecular formula of tertiary amine.
What is the catalyst used in the conversion of acetaldehyde to acetic acid ?
Manganese acetate
LiAlH4
H2/ NI
Na/ NH3
What is X in the following reaction?
2CH3COCH3 X
H3C--CH2--CH3
H3C--CH2-CH2-CHO
CH3CH(CH3)CH2COCH3
H3C--CH3