Which of the following element doesnot show allotropy_________________?
Which of the following element doesnot show allotropy_________________?
A. Carbon
B. Arsenic
C. Nitrogen
D. Sulphur
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Addition of 2nd electron to a uni negative ion is always____________________?
Addition of 2nd electron to a uni negative ion is always____________________?A. Exothermic
B. Endothermic
C. Data is insufficient
D. UnpredictableA specie with maximum number of unpaired electrons ?
A specie with maximum number of unpaired electrons ?A. F
B. H2O
C. HF
D. NH-2Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?
Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. All of aboveChemical equilibrium state is_______________?
Chemical equilibrium state is_______________?A. dynamic state
B. static state
C. free state
D. unidirectional stateWhich of the following substances does not give iodoform test ?
Which of the following substances does not give iodoform test ?A. acetaldehyde
B. ethyl alcohol
C. methyl alcohol
D. acetoneUnit of Kc is_______________?
Unit of Kc is_______________?A. moles2dm+6
B. moles-2dm+6
C. moles+2dm-6
D. Kc may or may not have units