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.Management Sciences
Category: Chemistry Basic Concept
A solution has pH = 0 its H+ ion concentration is__________________?
0
A. 1 x 10-1
B. 1 x 10-14
C. 1 x 10-7
D. 1
Which of the elements do not fall in stair case of the modern periodic table__________________?
A. Si
B. As
C. Te
D. None of the above
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?
A. Ethylene iodide
B. Ethylene bromide
C. Ethylene chloride
D. Ethylene fluoride
Which of the solid does not contain covalent bond__________________?
A. copper
B. ice
C. diamond
D. graphite
The mass of decimole of electrons (NA) is___________________?
A. 1.008 mg
B. 0.184 mg
C. 0.054 mg
D. 5.4 mg
If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________?
A. 0?C
B. 273.16K
C. ?273.16 K
D. ?273.16?C
1 a.m.u =__________________?
A. 1.6 x 10-27 kg
B. 1.6 x 10-24 kg
C. 1.6 x 10-26 kg
D. 1.6 x 10-28 kg
Which of the following statement is correct ?
A. size of Cl atoms > Cl- ion
B. size of Na+ ion < Na atom
C. size of Na atom < Na+ ion
D. Cl- < Na+
Which one of the following is not the mono isotopic element ?
A. arsenic
B. uranium
C. iodine
D. nickel
When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?
A. phenol is unsaturated
B. 2-bromophenol is insoluble in water
C. a hydroxy group makes the benzene ring more susceptible to electrophilic attack
D. acid-base reaction
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