p-block elements (group15 to 18)

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Test1 Max. Marks = 40

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1. Which out of the following gases is obtained when ammonium dichromate is heated -

4 points

(A) Oxygen

(B) Ammonia

(D) Nitrous oxide

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2. The correct sequence of decrease in the bond angle of the following hydrides is - :

4 points

(A) NH₃> PH₃ > AsH₃> SbH₃

(B) NH₃> AsH₃ > PH₃> SbH₃

(D) PH₃> NH₃ > AsH₃> SbH₃

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3. Aqua regia is mixture of –

4 points

(A) 3HCl + HNO₃

(B) 3HNO₃ + HCl

(D) PH₃ + HClO

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4. Ozone reacts with dry iodine to give -

4 points

(A) IO₂

(B) I₂O₃

(D) I₄O₉

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5. Low volatile nature of H₂SO₄ is due to -

4 points

(A) Hydrogen bonding

(B) Vander Waals' forces

(D) None of these

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6. The acidic character of dioxides of members of oxygen family decreases in the order -

4 points

(A) SeO₂ > SO₂ > TeO₂ > PoO₂

(B) SO₂ > SeO₂ >TeO₂ > PoO₂

(D) TeO₂ > PoO₂ > SeO₂ > SO₂

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7.When iodine reacts with NaF, NaBr and NaCl -:

4 points

(A) It gives mixture of F₂, Cl₂ and Br₂

(B) It gives chlorine

(D) None of the above

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8.T-shape molecule are -

4 points

(A) ClF₃

(B) ICl₃

(D) All of these

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9. Which of the following noble gas was reacted with PtF₆ by Bartlett to prepare the first noble gas compounds - :

4 points

(A) He

(B) Xe

(D) Kr

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10.The ease of liquefication of noble gases decreases in the order -

4 points

A) He > Ne > Ar > Kr > Xe

(B) Xe > Kr > Ar > Ne > He

(D) Ar > Kr > Xe > He > Ne

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