The compound produced when sodium peroxide is heated with excess sodium is
Na2CO3
Na2O
NaNO2
NaOH
Correct answer is B
No explanation has been provided for this answer.
Phosphorus-32
Cobalt-60
Carbon-14
Iodine-131
Correct answer is B
No explanation has been provided for this answer.
0.05 moldm-3
0.30 moldm-3
0.50 moldm-3
0.40 moldm-3
Correct answer is C
2g NaOH is contained in 100cm3
Xg NaOH is contained in 1000cm3
Xgram = \(\frac{2\times 1000}{100}\) = 20g
Mole = \(\frac{20}{40}\) = 0.50mol/dm3
The process that requires the use of hardwater in its operation is
Tanning
Bottling
Laundry
Dyeing
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements is true about 2-methylpropane and butane
They have different number of carbon atoms
They are members of same homologous series
They have the same boiling points
They have different chemical properties
They are members of same homologous series and Isomers as well
Correct answer is B
No explanation has been provided for this answer.