P - Block Elements Test

Result

P - Block Elements Test - 65

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Weekly Quiz Competition

Question 1
4 / -1

Aqua-regia is

A
1: 3 conc. HNO₃ and conc. HCl

B
1: 2 conc. HNO₃ and conc. HCl

C
3 :1 conc. HNO₃ and conc. HCl

D
2 : 1 conc. HNO₃ and cone. HC1
Question 2
4 / -1

The correct order of pseudohalide, polyhalide and interhalogen are

A

B

C

D
Question 3
4 / -1

Under ambient conditions, the total number of gases released as products in the final step of the reaction scheme shown below is

A
0

B
1

C
2

D
3

Solution
Question 4
4 / -1

The structure of XeF₆ is experimentally determined to be distorted octahedron. Its structure according to VSEPR theory is

A
octahedron

B
trigonal bipyramid

C
pentagonal bipyramid

D
tetragonal bipyramid

Solution
Question 5
4 / -1

A
180°

B
120°

C
109°

D
90°

Solution
Question 6
4 / -1

Platinum, palladium and iridium are called noble metals because

A
Alfred Nobel discovered them

B
they are found in native state

C
they are shining lustrous and pleasing to look at

D
they are inert towards many common reagents
Question 7
4 / -1

Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because

A
helium is much less soluble in blood than nitrogen

B
nitrogen is much less soluble in blood than helium

C
due to high pressure deep under the sea nitrogen and oxygen react to give poisonous nitric oxide

D
nitrogen is highly soluble in water
Question 8
4 / -1

Which of the following is the life saving mixture for an asthma patient?

A
Mixture of helium and oxygen

B
Mixture of neon and oxygen

C
Mixture of xenon and nitrogen

D
Mixture of argon and oxygen
Question 9
4 / -1

Which one of the following reaction of xenon compounds is not feasible?

A
XeO₃ + 6HF → XeF₆ + 3H₂O

B
3XeF₄ + 6H₂O → 2Xe + XeO₃ + 12HF + 1.5 O₂

C
2XeF₂ + 2H₂O → 2Xe + 4HF + O₂

D
XeF₆ + RbF → Rb [ XeF₇ ]

Solution
Question 10
4 / -1

The formation of O₂⁺ [PtF₆]^- is the basis for the formation of xenon fluorides. This is because

A
O₂ and Xe have comparable sizes

B
Both O₂ and Xe are gases

C
O₂ and Xe have comparable ionisation energies

D
Both (1) and (3)