Chemistry Test 186

Result

Chemistry Test 186

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Score
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Rank

Time Taken: -

Question 1/10
4 / -1

Correct

Wrong

Skipped
A
0.167

Correct

Wrong

Skipped
B
0.6

Correct

Wrong

Skipped
C
0.2

Correct

Wrong

Skipped
D
0.4

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Solutions
Question 2/10
4 / -1

The correct set of four quantum numbers for the valence electrons of rubidium atom (Z = 37) is:

Correct

Wrong

Skipped
A
5,0,0, +1/2

Correct

Wrong

Skipped
B
5,1,0, +1/2

Correct

Wrong

Skipped
C
5,1,1, +1/2

Correct

Wrong

Skipped
D
5, 0, 1, +1/2

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Solutions
Question 3/10
4 / -1

Which of the following statements is wrong ?

Correct

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A
van der Waal’s radius of iodine is more than its covalent radius

Correct

Wrong

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B
All isoelectronic ions belong to same period of the periodic table

Correct

Wrong

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C
of N is higher than that of O while of O is higher than that of N

Correct

Wrong

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D
The electron gain enthalpy of N is almost zero while that of P is 74.3 kJ

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Solutions

In the isoelectronic species, all isoelectronic anions belong to the same period and cations to the next period.
Question 4/10
4 / -1

Amongst LiCl, RbCl, the compounds with the greatest and the least ionic character, respectively are:

Correct

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A
LiCl and RbCl

Correct

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B
RbCl and

Correct

Wrong

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C

Correct

Wrong

Skipped
D

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Solutions

According to Fajan’s rules smaller, highly charged cation has greatest covalent character while large cation with smaller charge has greatest ionic character.
Question 5/10
4 / -1

56 g of nitrogen and 96 g of oxygen are mixed isothermally and at a total pressure of 10 atm. The partial pressures of oxygen and nitrogen (in atm) are respectively

Correct

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Skipped
A
4, 6

Correct

Wrong

Skipped
B
5, 5

Correct

Wrong

Skipped
C
2, 8

Correct

Wrong

Skipped
D
6, 4

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Solutions
Question 6/10
4 / -1

Temperature of 5 moles of a gas is decreased by 2K at constant pressure. Indicate the correct statement

Correct

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Skipped
A
Work done by gas is = 5 R

Correct

Wrong

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B
Work done over the gas is = 10 R

Correct

Wrong

Skipped
C
Work done by the gas = 10 R

Correct

Wrong

Skipped
D
Work done = 0

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Solutions
Question 7/10
4 / -1

Zirconium phosphate dissociates into three zirconium cations of charge + 4 and four phosphate anions of charge – 3. If molar solubility of zirconium phosphate is denoted by S and its solubility product by K_sp then which of the following relationship between S and K_sp is correct?

Correct

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A

Correct

Wrong

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B

Correct

Wrong

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C

Correct

Wrong

Skipped
D

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Solutions
Question 8/10
4 / -1

Thiosulphate reacts differently with iodine and bromine in the reactions given below.

Which of the following statements justifies the above dual behaviour of thiosulphate?

Correct

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A
Bromine is a stronger oxidant than iodine

Correct

Wrong

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B
Bromine is a weaker oxidant than iodine

Correct

Wrong

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C
Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reactions

Correct

Wrong

Skipped
D
Bromine undergoes oxidation and iodine undergoes reduction in these reactions

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Solutions
Question 9/10
4 / -1

Which statement is wrong?

Correct

Wrong

Skipped
A
Ordinary hydrogen is an equilibrium mixture of ortho and para hydrogen

Correct

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B
In ortho hydrogen spin of two nuclei is in same direction

Correct

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C
Ortho and para forms do not resemble in their chemical properties

Correct

Wrong

Skipped
D
In para hydrogen spin of two nuclei is in opposite direction.

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Solutions

Ortho and para forms of hydrogen resemble in their chemical properties.
Question 10/10
4 / -1

A firework gives out crimson coloured light. It contains a salt of

Correct

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A
Ca

Correct

Wrong

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B
Na

Correct

Wrong

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C
Sr

Correct

Wrong

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D
Ba

Question 1/10

0.167

0.6

0.2

0.4

Question 2/10

5,0,0, +1/2

5,1,0, +1/2

5,1,1, +1/2

5, 0, 1, +1/2

Question 3/10

van der Waal’s radius of iodine is more than its covalent radius

All isoelectronic ions belong to same period of the periodic table

of N is higher than that of O while of O is higher than that of N

The electron gain enthalpy of N is almost zero while that of P is 74.3 kJ

Question 4/10

LiCl and RbCl

RbCl and

Question 5/10

4, 6

5, 5

2, 8

6, 4

Question 6/10

Work done by gas is = 5 R

Work done over the gas is = 10 R

Work done by the gas = 10 R

Work done = 0

Question 7/10

Question 8/10

Bromine is a stronger oxidant than iodine

Bromine is a weaker oxidant than iodine

Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reactions

Bromine undergoes oxidation and iodine undergoes reduction in these reactions

Question 9/10

Ordinary hydrogen is an equilibrium mixture of ortho and para hydrogen

In ortho hydrogen spin of two nuclei is in same direction

Ortho and para forms do not resemble in their chemical properties

In para hydrogen spin of two nuclei is in opposite direction.

Question 10/10

Ca

Na

Sr

Ba