The shape of ClO3- is

(1) Tetrahedral

(2) Triangular planer

(3) Triangular pyramid

(4) Planer

Subtopic:  Group 17 - Preparation, Properties & Uses |
 61%
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Which reaction can not be used for the preparation of halogen acid

(A) 2KBr +H2SO4(conc.) K2SO4 +2HBr
(B) NaCl +H2SO4(conc.) NaHSO4 +HCl
(C) NaHSO4 +NaCl Na2SO4 +HCl
(D) CaF2 +H2SO4(conc.) CaSO4 +2HF

Subtopic:  Group 17 - Preparation, Properties & Uses |
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Hints

An element (X) forms compounds of the formula XCl3, X2O5 and Ca3X2,but does not form XCl5. Which of the following is the element

(1) B

(2) Al

(3) N

(4) P

Subtopic:  Group 15 - Preparation, Properties & Uses |
 73%
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Oxygen does not form OF6 because

1. It has a small size

2. There are no vacant d- orbitals available

3.  It has high ionization energy

4. It has a large size

Subtopic:  Group 16 - Preparation, Properties & Uses |
 89%
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The molecule having the smallest bond angle is

(1) H2O

(2) H2S

(3) H2Te

(4) H2Se

Subtopic:  Group 16 - Preparation, Properties & Uses |
 62%
From NCERT
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The correct statement regarding H3PO3 is:

1. Each hydrogen atom is attached to oxygen.

2. Two hydrogen atoms are attached to oxygen atoms.

3. One atom of H is attached to oxygen.

4. None of the above.

Subtopic:  Group 16 - Preparation, Properties & Uses |
 80%
From NCERT
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Links
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Strong oxidising agent and strong reducing agents are respectively

(1) F2, HI

(2) Cl2, HCl

(3) Br2,HBr

(4) I2, HF

Subtopic:  Group 17 - Preparation, Properties & Uses |
 87%
From NCERT
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Oxide of a non-metal possesses the following characterstics.

(i) It is both a proton donor and proton acceptor

(ii) It is poor conductor of electricity

(iii) It reacts readily with basic and acidic oxides

(iv) It oxidises Fe at boiling point.

The oxide is

(1) H2O

(2) CO2

(3) H2O2

(4) NO

Subtopic:  Group 16 - Preparation, Properties & Uses |
 51%
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A yellow metallic powder is burnt in a stream of fluorine to obtain a colourless gas X which is thermally stable and chemically inert. Its molecule has octahedral geometry. Another colourless gas Y with same constituent atoms as that of X is obtained when sulphur dichloride is heated with sodium fluoride. Its molecule has triangular pyramidal structure X and Y are

(1) SF4 and S2F2

(2)  SF6 and  SF4 

(3) NaF and NaCl

(4)  SF4 and SF6 

Subtopic:  Group 16 - Preparation, Properties & Uses |
 76%
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The shape and the type of hybridization (of the Cl-atom) in  the CIF3 molecule

1. 2.
3. 4.

Subtopic:  Group 17 - Preparation, Properties & Uses |
 55%
From NCERT
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