NEET Questions Solved


Which of the following statements is correct for CsBr3?

(a) it is a covalent compound

(b) It contains Cs2+ and Br- ions

(c) It contains Cs+, Br- and Br2 lattice molecules

(d) It contains Cs+ and Br3- ions

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NO2 is obtained by heating:

(a) CsNO3

(b) KNO3

(c) LiNO3

(d) NaNO3

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Excess of dilute sodium hydroxide solution is gradually added with shaking to an aqueous solution of zinc sulphate. What would you observe?

(a) A light blue precipitate is first formed which finally dissolves to give a deep blue solution

(b) A white precipitate appears which dissolves to give a colourless solution.

(c) A white precipitation is formed which does not dissolve 

(d) No change takes place and the solution remains clear

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Which has lowest thermal stability?

(a) Li2CO3

(b) Na2CO3

(c) K2CO3

(d) Rb2CO3

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Which alkali metal reacts with nitrogen to form nitride?

(a) Li

(b) Na

(c) Cs

(d) None of the above

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The most basic oxide among the following is:

(a) Na2O

(b) BaO

(c) As2O3

(d) Al2O3

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The most dangerous method of precipitating hydrogen would be by the action of HCl on:

(a) Zn

(b) Fe

(c) K

(d) Al

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 Na2COand NaHCO3 may be distinguished by treating their aqueous solution with:

(a) litmus solution

(b) dil. acid

(c) MgO

(d) MgSO4

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Which is industrially prepared by the electrolysis of aqueous NaCl?

(a) Na2CO3

(b) NaHCO3

(c) NaOH 

(d) NaOCl

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Sodium cannot be extracted by the electrolysis of brine solution because:

(a) sodium leberated reacts with water to produce NaOH+H2

(b) sodium being more electropositive than hydrogen, H2 is liberated at cathod and not sodium

(c) electrolysis cannot take place with brine solution

(d) none of the above

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