Category: Chemistry Basic Concept

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________________?

Hamad Chemistry Basic Concept 07/07/2020

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A. 0?C
B. 273.16K
C. ?273.16 K
D. ?273.16?C

1 a.m.u =__________________?

Hamad Chemistry Basic Concept 26/06/2020

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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 ?

Hamad Chemistry Basic Concept 27/05/2020

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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 ?

Hamad Chemistry Basic Concept 27/05/2020

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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 ?

Hamad Chemistry Basic Concept 20/05/2020

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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

Which of the following is not a macromolecule ?

Hamad Chemistry Basic Concept 12/05/2020

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A. sand
B. haemoglobin
C. diamond
D. maltose