Which of following is not a base______________?
Which of following is not a base______________?
A. KOH
B. NH3
C. PH3
D. BF3
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Which one of the following is the weakest acid in water__________________?
Which one of the following is the weakest acid in water__________________?A. HF
B. HCI
C. HBr
D. HIShielding effect across the period_________________?
Shielding effect across the period_________________?A. Increases
B. Decreases
C. Can not be predicted
D. Remains constantPlasma is used in_________________?
Plasma is used in_________________?A. Fluorescent bulb
B. Neon signs
C. Lasers
D. All of theseWhen 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?
When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ?A. 0.5
B. 1
C. 1.5
D. 2What is the molecular weight of Ammonia (NH3) ________ ?
What is the molecular weight of Ammonia (NH3) ________ ?A. 17.031 g/mol
B. 18.031 g/mol
C. 19.031 g/mol
D. 27.033 g/molSubstance which is found in dried up lakes of Tibet and California is_______________?
Substance which is found in dried up lakes of Tibet and California is_______________?A. Tincal
B. Boric acid
C. Calcium carbonate
D. Colemanite