Chemistry Test 185

Result

Chemistry Test 185

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Weekly Quiz Competition

Question 1
4 / -1

The I.E1 among the group 13 member follows as

A
B > Al < Ga < Tl

B
B > Al > Ga > Tl

C
B > Ga > Al > Tl

D
B > Ga < Al < Tl

Solution
Question 2
4 / -1

Aniline is purified by

A
steam distillation

B
simple distillation

C
vacuum distillation

D
extraction with a solvent

Solution

This method is applied for the purification of substances which (i) are insoluble in water, (ii) are volatile in steam, (iii) are associated with non steam volatile impurities, (iv) have high molecular weights and (v) possess a fairly high vapour pressure at about the boiling point of water e.g. Aniline.
Question 3
4 / -1

When neo-pentyl bromide is subjected to Wurtz reaction, the product formed is

A
2,2,4,4-tetramethylhexane

B
2,2,4,4-tetramethylpentane

C
2,2,5,5-tetramethylhexane

D
2,2,3,3-tetramethylhexane

Solution
Question 4
4 / -1

Water is often treated with chlorine to

A
remove hardness

B
increase oxygen content

C
kill germs

D
remove suspended particles

Solution
Question 5
4 / -1

Coordination numbers of – in the crystal structure of wurtzite are

A
4, 4

B
6, 6

C
8, 4

D
8, 8

Solution
Question 6
4 / -1

A solution contains non-volatile solute of molecular mass M₂. Which of the following can be used to calculate the molecular mass of solute in terms of osmotic pressure?

A

B

C

D

Solution
Question 7
4 / -1

When a biochemical reaction is carried out in laboratory in the absence of enzyme then rate of reaction obtained is 10–6 times, then activation energy of reaction in the Presence of enzyme is

A
6/RT

B
Different from Ea obtained in laboratory

C
P is required

D
Can't say anything

Solution

The presence of enzyme (catalyst) increases the speed of reaction by lowering the energy barrier, i.e. a new path is followed with lower activation energy.
Question 8
4 / -1

Freundlich equation for adsorption of gases (in amount of x g) on a solid (in amount of m g) at constant temperature can be expressed as

A

B

C

D

Solution

According to Freundlich equation.
Question 9
4 / -1

In nitroprusside ion, the iron and NO exist as and NO. These forms can be differentiated by

A
estimating the concentration of iron

B
measuring the concentration of CN-

C
measuring the solid state magnetic moment

D
thermally decomposing the compound

Solution
Question 10
4 / -1

Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?

A
3d⁵4s¹

B
3d⁵4s²

C
3d²4s²

D
3d³4s²

Solution