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Fill in the blanks by choosing the appropriate word/words from those given in the brackets…
(a)[4.0]
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(iodoform, volume, mass, haloform, gram equivalent, chloroform, carbylamine, $sp^3d^2$, high, coke, $d^2sp^3$, low, gram mole, carbon monoxide)
(i) Equivalent conductivity is the conducting power of all the ions furnished by one ___________ of an electrolyte present in a definite ________ of the solution.
(ii) Bleaching powder, on treatment with ethanol or acetone gives _______. This is an example of _________ reaction.
(iii) Outer orbital complexes involve ________ hybridization and are _______ spin complexes.
(iv) Zinc oxide is reduced by _________ at $1673\text{ K}$ to form zinc and __________.
(b)[4.0]
Select the correct alternative from the choices given:
(i) The packing efficiency of simple cubic structure, body centered cubic structure and face centered cubic structure respectively is:
(1) $52\cdot4\%$, $74\%$, $68\%$
(2) $74\%$, $68\%$, $52\cdot4\%$
(3) $52\cdot4\%$, $68\%$, $74\%$
(4) $68\%$, $74\%$, $52\cdot4\%$
(ii) When acetone is treated with Grignard’s reagent, followed by hydrolysis, the product formed is:
(1) Secondary alcohol
(2) Tertiary alcohol
(3) Primary alcohol
(4) Aldehyde
(iii) Which of the following electrolytes is least effective in causing flocculation of positively charged ferric hydroxide sol?
(1) $\text{K}_3[\text{Fe}(\text{CN})_6]$
(2) $\text{K}_2\text{CrO}_4$
(3) $\text{K}_4[\text{Fe}(\text{CN})_6]$
(4) $\text{KBr}$
(iv) On heating an aliphatic primary amine with chloroform and alcoholic potassium hydroxide, the organic compound formed is an:
(1) Alkyl isocyanide
(2) Alkanol
(3) Alkanal
(4) Alkyl cyanide
(c)[4.0]
Match the following:
Column A
- (i)Silicon and phosphorous
- (ii)Iodoform test
- (iii)Arrhenius equation
- (iv)Distorted octahedral structure
Column B
- (a)Acetaldehyde
- (b)Xenon hexafluoride
- (c)n-type of semiconductors
- (d)Frequency factor
(d)[8.0]
Answer the following questions:
(i) What is the common name of the polymer obtained by the polymerization of caprolactam? Is it addition polymer or condensation polymer?
(ii) Why $\text{Zn}^{2+}$ ions are colourless while $\text{Ni}^{2+}$ ions are green and $\text{Cu}^{2+}$ ions are blue in colour?
(iii) The molar conductivity of $\text{NaCl}$, $\text{CH}_3\text{COONa}$ and $\text{HCl}$ at infinite dilution is $126\cdot45$, $91\cdot0$ and $426\cdot16\text{ ohm}^{-1}\text{ cm}^2\text{ mol}^{-1}$ respectively. Calculate the molar conductivity ($\lambda_m^\infty$) for $\text{CH}_3\text{COOH}$ at infinite dilution.
(iv) Identify the compounds A, B, C and D.
$\text{C}_6\text{H}_5\text{COOH} \xrightarrow{\text{SOCl}_2} \text{A} \xrightarrow{\text{NH}_3} \text{B} \xrightarrow{\text{Br}_2 / \text{KOH}} \text{C} \xrightarrow[0 - 5^\circ\text{C}]{\text{NaNO}_2 + \text{HCl}} \text{D}$
Answer
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From ISC 2020 Chemistry Paper 1, question 1.