NEET Questions - Chemistry - Chemistry practical

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In borax bead test, which of the following compound is formed [CBSE PMT 2002]

Meta borate
Tetra borate
Double oxide
Ortho borate

The metal that does not give the borax-bead test is [MP PMT 1999]

Chromium
Nickel
Lead
Manganese

Which of the following is coloured compound? [BCECE 2005]

$ CuF_2 $
CuI
NaCl
$ MgCl_2 $

Which gives violet coloured bead in borax bead test [BHU 1988; MP PET 1997]

$ Fe ^ {2 + } $
$ Ni ^ {2+ } $
$ Co ^ {2 + } $
$ Mn ^ {2+ } $

When concentrated $H_2SO_4$ is added to dry $KNO_3$ , brown fumes evolve. These fumes are [CPMT 1988; IIT 1987]

$ SO _2 $
$ SO _3 $
NO
$ NO_2 $

Which one of the following salt give green coloured flame when the salt is tested by Pt wire

Barium salt
Calcium salt
Borate
Lead salt

Sodium sulphite on heating with dilute HCl liberates a gas which [NCERT 1972]

Turns lead acetate paper black
Turns acidified potassium dichromate paper green
Burns with a blue flame
Smells like vinegar

Starch-iodide paper is used for the test of

Iodine
Iodide ion
Oxidising agent
Reducing agent

Which of the following salt gives white precipitate with solution and dil. solution and gives green flame test

$ CuCl_2 $
$ BaCl_2 $
$ PbCl_2 $
$ Cu (NO_3 )_2 $

Two gases when mixed give white dense fumes, the gases are

$ NH_3 and SO_2 $
$ SO_2 and steam $
$ NH_3 and HCl $
$ NH_3 and N_2 O $

Blue borax bead is obtained with [MADT Bihar 1982; MP PET 1995]

Zn
Cobalt
Chromium
Fe

Which of the following imparts green colour to the burner flame [DCE 2004]

$ B ( OMe) _3 $
Na (OMe )
$ Al (OPr) _3 $
$ Sn (OH)_2 $

A colourless gas with the smell of rotten fish is [AFMC 2005]

$ H_2 S $
$ PH_3 $
$ SO_2 $
None of these

$ MnO_2 and H_2SO_4 $ added to NaCl, the greenish yellow gas liberated is [Orissa JEE 2005]

$ Cl_2 $
$ NH_3 $
$ N_2 $
$ H_2 $

Which of the following statement(s) is(are) correct when a mixture of NaCl and $K_2Cr_2O_7 $ is gently warmed with conc $H_2SO_4$ . [IIT 1998; CPMT 1988; AMU 1984; MP PMT 2002]

A deep red vapour is evolved
The vapour when passed into NaOH solution gives a yellow solution of $Na_2Cr_2O_7$
Chlorine gas is evolved
Chromyl chloride is formed

NEET Chemistry Questions: Chemistry practical