Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?
A. PdCl2
B. Cu2Cl2
C. CuCl2
D. PbCl2
Submitted by :- Jamil Ahmed
CHEMISTRY
Prepare for your upcoming test with a comprehensive collection of Chemistry multiple-choice questions (MCQs), ranging from basic to advanced topics. These Chemistry MCQs cover various sections of the subject, providing you with valuable practice and boosting your chances of scoring well in the Chemistry portion of the test. Whether you’re a student or a job seeker preparing for exams, these MCQs will prove beneficial for your test preparation.
| Now you can submit here the latest Chemistry MCQs. SUBMIT HERE |
|---|
Aldehyde and ketone have same general formula for homologous series_________________?
A. CnH2nO2n
B. CnH2n
C. CnH2nO
D. CnH2nOn+1
Submitted by :- Jamil Ahmed
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
A. pink
B. black
C. yellow
D. brick red
Submitted by :- Jamil Ahmed
Formalin H-CHO / CH2O consists of mixture of formaldehyde methyl alcohol and water Percentage Of Formaldehyde in it is________________?
A. 60%
B. 50%
C. 37%
D. 80%
Submitted by :- Jamil Ahmed
Formula of haloform is_________________?
A. HCOX
B. CX4
C. CHX3
D. CH3X
Submitted by :- Jamil Ahmed
Crystals of Na2CO3. 10H2O when exposed to air_________________?
A. Lose water and remain solid
B. Gain water and remain solid
C. Gain water and become liquid
D. Remains unchanged
Submitted by :- Jamil Ahmed
Ammonia may be prepared by heating ammonium chloride with_______________?
A. Water
B. NaCl
C. Aqueous sodium hydroxide
D. H2SO4
Submitted by :- Jamil Ahmed
Downs cell is used to prepare_________________?
A. Sodium carbonate
B. Sodium bicarbonate
C. Sodium metal
D. Sodium hydroxide
Submitted by :- Jamil Ahmed
Which one of the following is not an alkali metal ?
A. Francium
B. Cesium
C. Rubidium
D. Radium
Submitted by :- Jamil Ahmed
Carbonates of lithium are not stable like that of sodium due to________________?
A. Low electronegativity
B. Low electro positivity
C. Low charge density
D. Not known yet
Submitted by :- Jamil Ahmed