Chemistry - Online Test
Q1. α-D (+) Glucose and β-D (+) glucose are
Answer : Option B
Explaination / Solution:
No Explaination.
Q2. The half life period of a radioactive element is 140 days. After 560 days , 1 g of element will be reduced to
Answer : Option D
Explaination / Solution:
In 140 days ⟹ initial concentration
reduced to (1/2)g
In 280 days ⟹ initial concentration
reduced to (1/4)g
In 420 days ⟹
initial concentration reduced to (1/8)g
In 560 days ⟹ initial concentration
reduced to (1/16)g
Q3. Dissociation
constant of NH4OH is 1.8 ×10-5
the hydrolysis constant of NH4Cl would be
Answer : Option B
Explaination / Solution:
Kh = Kw/Kb =
1×10-14 / 1.8×10-5
= 0.55×10-9
= 5.5×10-10
Q4. In the Ellingham diagram, for the formation of carbon monoxide
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. A gas X at 1 atm is bubbled through a solution containing a mixture of 1MY- and 1MZ- at 25°C . If the reduction potential of Z>Y>X, then
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. The actinoid elements which show the highest oxidation state of +7 are
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
Answer : Option D
Explaination / Solution:
No Explaination.
Q8. Among the following, the reaction that proceeds through an electrophilic substitution, is :
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. The crystal with a metal deficiency defect is
Answer : Option B
Explaination / Solution:
No Explaination.
Q10. Which of the following are epimers
Answer : Option D
Explaination / Solution:
No Explaination.
