Download App

The d- and f-Block Elements — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryThe d- and f-Block Elements5 Marks
Question
Describe the differences in the properties of lanthanoids and actinoids.
✓

Answer

self

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from The d- and f-Block Elements→The d- and f-Block Elements — all question types→Chemistry STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Match the coordination compounds given in Column $I$ with the central metal atoms given in Column $II$ and assign the correct code:
 
Column $I ($Coordination Compound$)$
 
Column $II ($Central metal atom$)$
$a.$
Chlorophyll
 $1.$
Rhodium
$b.$
Blood pigment
 $2.$
Cobalt
$c.$
Wilkinson catalyst
 $3.$
Calcium
$d.$
Vitamin $B_{12}$
 $4.$
Iron
 
 
 $5.$
Magnesium
Code:
→
Explain the different methods of preparing haloakanes from alcohols.
→
Write the chemical reactions of $C _2 H _5 OH$ with following compounds :
(i) $CH _2 N_2$ (diazomethane) (ii) ketone, (iii) $HC \equiv$ $C H$ (iv) $C H _3 N C O$ (Methyl-isocyanate) (v) $C H _3 C H O$ (ethanol) (vi) conc. $H _2 SO _4$ at $0^{\circ} C$.
→
  1. Define the following terms:
  1. Ideal solution.
  2. Azeotrope.
  3. Osmotic pressure.
  1. A solution of glucose $(C_6H_{12}O_6)$ in water is labelled as $10\%$ by weight. What would be the molality of solution?
$($Molar mass of glucose $= 180\ g\ mol^{-1}).$
→
When kept in water, raisin swells in size. Name and explain the phenomenon involved with the help of a diagram. Give three applications of the phenomenon.
→
How are carboxylic acids prepared from the following compounds? Explain with examples:
(a) Primary alcohol
(b) Acyl halide
(c) Acid anhydride
(d) Grignard reagent
(e) Alkyl benzene.
→
What is vapour pressure? When a non- volatile solute is dissolved in any liquid, the vapour pressure of the liquid decreases. Give reason.
→
Answer the following question:
$g$ of benzoic acid $(C_6H_5COOH)$ dissolved in $25g$ of benzene shows a depression in freezing point equal to $1.62K.$ Molal depression constant for benzene is $4.9K \ kg\ mol^{-1}.$ What is the percentage association of acid if it forms dimer in solution$?$
→
Answer the following questions$:$
Write balanced equations to represent what happens when.
  1. $Cu^{2+}$ is treated with $KI.$
  2. Acidified potassium dichromate solution is reacted with iron $(II)$ solution. $($ionic equation$).$
→
$19.5 g$ of $\ce{CH2FCOOH}$ is dissolved in $500 g$ of water. The depression in the freezing point of water observed is $1.0^\circ C$. Calculate the van’t Hoff factor and dissociation constant of fluoroacetic acid.
→