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Class 9 Exam  >  Class 9 Tests  >  P - Block Elements Practice Quiz - 1 - Class 9 MCQ

P - Block Elements Practice Quiz - 1 - Class 9 MCQ


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25 Questions MCQ Test - P - Block Elements Practice Quiz - 1

P - Block Elements Practice Quiz - 1 for Class 9 2024 is part of Class 9 preparation. The P - Block Elements Practice Quiz - 1 questions and answers have been prepared according to the Class 9 exam syllabus.The P - Block Elements Practice Quiz - 1 MCQs are made for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for P - Block Elements Practice Quiz - 1 below.
Solutions of P - Block Elements Practice Quiz - 1 questions in English are available as part of our course for Class 9 & P - Block Elements Practice Quiz - 1 solutions in Hindi for Class 9 course. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free. Attempt P - Block Elements Practice Quiz - 1 | 25 questions in 50 minutes | Mock test for Class 9 preparation | Free important questions MCQ to study for Class 9 Exam | Download free PDF with solutions
P - Block Elements Practice Quiz - 1 - Question 1
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Elements having +5 oxidation state is

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Total valence e = 5 so it will show +5 oxidation state.

P - Block Elements Practice Quiz - 1 - Question 2
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 is the electronic configuration of

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Arsenic has atomic no. 33.

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P - Block Elements Practice Quiz - 1 - Question 3
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The most abundant oxidation states of nitrogen are

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N show -3 in NH3 and +3 in HNO2  and +5 in HNO3

P - Block Elements Practice Quiz - 1 - Question 4
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The maximum covalency of nitrogen is
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N has maximum covalency of 4. Max covalency = No. of orbitals in valence shell.

P - Block Elements Practice Quiz - 1 - Question 5
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Which compound is used in the preparation of caprolactam?
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NH3  is used in preparation of caprolactum.

P - Block Elements Practice Quiz - 1 - Question 6
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Ammonia act as a Lewis base because nitrogen has
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NH3 has one lone pair of electrons therefore can act as Lewis base.

P - Block Elements Practice Quiz - 1 - Question 7
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Which allotrope of phosphorous is most stable?
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Black Phosphorus is most stable isotope of phosphorus.

P - Block Elements Practice Quiz - 1 - Question 8
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What is the spontaneous ignition temperature of white phosphorous?
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Ignition temperature of white phosphorus is 35° C.

P - Block Elements Practice Quiz - 1 - Question 9
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   is the structure of
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This structure is of  H3PO4.(Phosphoric acid)

P - Block Elements Practice Quiz - 1 - Question 10
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Which of the following is an amphoteric oxide?
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Higher oxidation state oxides are acidic while lower oxidation state oxides are basic. Intermediate oxidation state oxides are amphroteric.

P - Block Elements Practice Quiz - 1 - Question 11
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Which gas has a smell of rotten fish?
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Phosphine has smell like rotten fish.

P - Block Elements Practice Quiz - 1 - Question 12
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Which of the following turns lead acetate paper black?
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P - Block Elements Practice Quiz - 1 - Question 13
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Which gas is evolved when urea is treated with NaOH?
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Urea on reaction with NaOH liberates ammonia.

P - Block Elements Practice Quiz - 1 - Question 14
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Ozone reacts with KOH solution to form
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O3 reacts with KOH to form KO3

P - Block Elements Practice Quiz - 1 - Question 15
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N2O3 is 
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P - Block Elements Practice Quiz - 1 - Question 16
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Which of the following is Paramagnetic?
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NO is paramagnetic. Its unpaired electron is present in antibonding orbital.

P - Block Elements Practice Quiz - 1 - Question 17
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Laughing gas is soluble in
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N2O is soluble in water.

P - Block Elements Practice Quiz - 1 - Question 18
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Which is used to produce smoke screens?
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Calcium phosphide is used to produce smoke screen.

P - Block Elements Practice Quiz - 1 - Question 19
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In XeO3 and XeF6  the oxidation state of Xe is
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Xe is oxidation state of +6.

P - Block Elements Practice Quiz - 1 - Question 20
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The structure of ClF3 is
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CN=0.5(V+M-C+A) For ClF3 CN = 5 so hybridisation is sp3d.
Structure is trigonal bipyramidal.

P - Block Elements Practice Quiz - 1 - Question 21
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Iodine is liberated from KI solution when treated with
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Cu2+ will reduce to Cu+ and I- will oxidize to I2.

P - Block Elements Practice Quiz - 1 - Question 22
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Ammonia is used in detection of
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Copper ions react with NH3 to form a blue color complex.

P - Block Elements Practice Quiz - 1 - Question 23
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Laughing gas is
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N2O is also known as Laughing gas.

P - Block Elements Practice Quiz - 1 - Question 24
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Which of the following is soluble in turpentine oil?
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Oxygen is soluble in turpentile oil.

P - Block Elements Practice Quiz - 1 - Question 25
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Available chlorine is librated from bleaching powder when
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Bleaching powder when reacts with alkali solution liberates chlorine.

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