MCQ 11 Mark
For the reaction A + 3B → 2C + 2D, the concentration of A changes from 0.150 M to 0.0135 M in 1 min. The rate of formation of C in mol/L/s is:
- A5 x 105
- B
3 x 10-5- ✓
5 x 10-5- D
2.5 x 10-5AnswerView full question & answer→Correct option: C.5 x 10-5(c) $5 \times 10^{-5}$
$
\begin{array}{l}
\text { Explanation: rate }=-\frac{d[A]}{d t}=-\frac{1}{3} \frac{d[B]}{d t}=+\frac{1}{2} \frac{d[C]}{d t}=+\frac{1}{2} \frac{d[D]}{d t} \\
\Rightarrow \frac{d[A]}{d t}=-\frac{1}{2} \frac{d[C]}{d t} \\
\Rightarrow \frac{d[C]}{d t}=2 \frac{d[A]}{d t}=-\frac{2 \times(0.0135-0.0150)}{1 \times 60}=5 \times 10^{-5} mol L^{-1} s^{-1} \\
\text { rate }=5 \times 10^{-5} mol L^{-1} s^{-1}
\end{array}
$MCQ 21 MarkThe IUPAC name of the compound shown below is:
- A6-bromo-2-chlorocyclohexene
- ✓3-bromo-1-chlorocyclohexene
- C2-bromo-6-chlorocyclohex-1-ene
- D1-bromo-3-chlorocyclohexene
AnswerView full question & answer→Correct option: B.3-bromo-1-chlorocyclohexene(b) 3-bromo-1-chlorocyclohexene
Explanation:
IUPAC name: 3-bromo 1-chlorocyclohexeneMCQ 31 MarkAmide which gives propanamine by Hoffmann bromamide is:- APentanamide
- BHexanamide
- ✓Butanamine
- DPropanamine
AnswerView full question & answer→Correct option: C.Butanamine(c) Butanamine
Explanation: In the Hoffmann bromamide reaction, the amine formed has one carbon less than that present in the amide. RCONH2 + Br2 + 4NaOH→ RNH2 + Na2CO3 + 2NaBr + 2H2OMCQ 41 MarkFor the reaction 3A → 2B, rate of reaction $-\frac{ d [ A ]}{ dt }$ is equal to- A$\frac{+1}{3} \frac{d[ B ]}{ dt }$
- B$\frac{+2}{3} \frac{d[ B ]}{ dt }$
- C$\frac{+1}{2} \frac{d[ B ]}{ dt }$
- ✓$\frac{+3}{2} \frac{d[ B ]}{ dt }$
AnswerView full question & answer→Correct option: D.$\frac{+3}{2} \frac{d[ B ]}{ dt }$(d) $\frac{+3}{2} \frac{d[ B ]}{ dt }$
Explanation: $\frac{+3}{2} \frac{d[ B ]}{ dt }$MCQ 51 MarkHaemoglobin and chlorophyll contain:- ✓Fe and Mg
- BFe and Mn
- CFe and Co
- DMg and Fe
AnswerView full question & answer→Correct option: A.Fe and Mg(a) Fe and Mg
Explanation: Haemoglobin contains Fe and Chlorophyll contains Mg.MCQ 61 MarkThe correct IUPAC name of
is- ✓2-Methylbutan-2-ol
- B3-Methylbutan-3-ol
- C2,2-Dimethylpropanol
- Dtert-butyl alcohol
AnswerView full question & answer→Correct option: A.2-Methylbutan-2-ol(a) 2-Methylbutan-2-ol
Explanation: The correct IUPAC name of
is 2-Methylbutan-2-olMCQ 71 MarkCheilosis is caused by deficiency of- AVitamin B6
- ✓Vitamin B2
- CVitamin C
- DVitamin B12
AnswerView full question & answer→Correct option: B.Vitamin B2(b) Vitamin B2
Explanation: Deficiency of Vitamin B2 (Riboflavin) results in Cheilosis (fissuring at corners of mouth and lips).MCQ 81 MarkEthylidene chloride is a/an __________ .- Avic-dihalide
- Bvinylic halide
- ✓gem-dihalide
- Dallylic halide
AnswerView full question & answer→Correct option: C.gem-dihalide(c) gem-dihalide
Explanation: Gem-dihalides are dihaloalkanes that have two halogen atoms of the same type attached to the same carbon a in a molecule. The common naming system of gem-dihalides (geminal halide) is alkylidene dihalides. Ethylidene dichloride thus is a gem-dihalide. The chemical formula of ethylidene dichloride is C3H6Cl2.MCQ 91 MarkLucas reagent is?- Aanhydrous PdCl2 and conc.HCl.
- Banhydrous AlCl3 and conc.HCl.
- Canhydrous CaC2 and conc. HCl.
- ✓anhydrous ZnCl2 and conc. HCl.
AnswerView full question & answer→Correct option: D.anhydrous ZnCl2 and conc. HCl.(d) anhydrous ZnCl2 and conc. HCl.
Explanation: "Lucas' reagent" is a solution of anhydrous zinc chloride in concentrated hydrochloric acid.MCQ 101 MarkMatch the items of column I with appropriate entries of column II.Column I Column II (а) Кь (i) Elevation in boiling point (b) Kf (ii) Van't Hoff factor (c) i (iii) Cryoscopic constant (d) $\Delta T _{ b }$ (iv) Ebullioscopic constant - A(a) (i), (b) - (ii), (c) - (iii), (d) - (iv)
- B(a) (ii), (b) - (i), (c) - (iii), (d) - (iv)
- C(a) (iii), (b) - (iv), (c) - (i), (d) - (ii)
- ✓(a) (iv), (b) - (iii), (c) - (ii), (d) - (i)
AnswerView full question & answer→Correct option: D.(a) (iv), (b) - (iii), (c) - (ii), (d) - (i)(d) (a)-(iv), (b) - (iii), (c) - (ii), (d) - (i)
Explanation: (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)MCQ 111 MarkWhich of the following reagents would one choose to transform CH3COCI into acetone?- ACH3MgBr
- ✓(CH3)2Cd
- C(CH3O)2Mg
- DCH3Cl
AnswerView full question & answer→Correct option: B.(CH3)2Cd(b) (CH3)2Cd
Explanation: (CH3)2CdMCQ 121 Mark
The structure of A and type of isomerism in the above reaction are respectively.- ✓Prop-2-en-2-ol, geometrical isomerism
- BProp-1-en-2-ol, metamerism
- CProp-1-en-2-ol, tautomerism
- DProp-1-en-1-ol, tautomerism
AnswerView full question & answer→Correct option: A.Prop-2-en-2-ol, geometrical isomerism(a) (c) Prop-1-en-2-ol, tautomerism
Explanation:
Prop-1-en-2-ol (A) acetone are tautomers. - B