# Solved papers for NEET Chemistry NEET PYQ-Analytical Chemistry

### done NEET PYQ-Analytical Chemistry Total Questions - 5

• question_answer1) When a substance A reacts with water it produces a combustible gas B and a solution of substance C in water. When another substance D reacts with this solution of C, it also produces the same gas B on warming but D can produce gas B on reaction with dilute sulphuric acid at room temperature. A imparts a deep golden yellow colour to a smokeless flame of bunsen burner A, B, C and D respectively are:                        [AIPMT 1998]

A)
$Na,\,{{H}_{2}},\,NaOH,\,Zn$

B)
$K,\,{{H}_{2}},\,KOH,\,Al$

C)
$Ca{{H}_{2}},\,Ca{{(OH)}_{2}},\,Sn$

D)
$Ca{{C}_{2}},\,{{C}_{2}}{{H}_{2}},\,Ca{{(OH)}_{2}},\,Fe$

• question_answer2) A one litre flask is full of brown bromine vapour. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some: [AIPMT 1998]

A)
pieces of marble

B)
animal charcoal powder

C)
carbon tetrachloride

D)
carbon disulphide

• question_answer3) A solid compound 'X' on heating gives $C{{O}_{2}}$gas and a residue. The residue mixed with water forms on passing an excess of $C{{O}_{2}}$through Y in water, a clear solution, 'Z' is obtained. On boiling 'Z' compound 'X' is reformed. The compound 'X' is:                              [AIPMT (S) 2004]

A)
$\text{Ca}{{\left( \text{HC}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}$

B)
$\text{CaC}{{\text{O}}_{\text{3}}}$

C)
$\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}$

D)
${{\text{K}}_{2}}C{{O}_{3}}$

• question_answer4) The compound A on heating gives a colourless gas and a residue that is dissolved in water to obtain B. Excess of CO2 is bubbled through aqueous solution of B, C is formed which is recovered in the solid form. Solid C on gentle heating gives back A. The compound A is [AIPMT (M) 2010]

A)
$CaC{{O}_{3}}$

B)
$N{{a}_{2}}C{{O}_{3}}$

C)
${{K}_{2}}C{{O}_{3}}$

D)
$CaS{{O}_{4}}\cdot 2{{H}_{2}}O$

• question_answer5) Roasting of sulphides gives the gas X as a by-product. This is a colour less gas with '.choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been insolated. The gas X is                                     [NEET 2013]

A)
${{\text{H}}_{\text{2}}}\text{S}$

B)
$\text{S}{{\text{O}}_{\text{2}}}$

C)
$\text{C}{{\text{O}}_{\text{2}}}$

D)
$\text{S}{{\text{O}}_{3}}$