MCQ
Crystals can be classified into $.......$ basic crystal habits:
- ✓$7$
- B$4$
- C$14$
- D$3$
✓
Answer
Correct option: A.
$7$
The structures of all crystals can be classified according to the symmetry of the unit cells. There are in total $7$ groups, collectively called Crystal Systems: Tricinic, Monoclinic, Orthorhombic, Tetragonal, Trigonal, Hexagonal, and Cubic.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The given graph is a representation of kinetics of a reaction.
→$[Image]$
The $y$ and $x$ axes for zero and first order reactions, respectively are
The correct sequential order of the reagents for the given reaction is.
Given below are two statements : one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
→Assertion $(A)$ : Experimental reaction of $CH _{3} Cl$ with aniline and anhydrous $AlCl _{3}$ does not give $o$ and $p-methylaniline$.
Reason $(R)$ : The - $NH _{2}$ group of aniline becomes deactivating because of salt formation with anhydrous $AlCl _{3}$ and hence yields $m$-methyl aniline as the product.
In the light of the above statements, choose the most appropriate answer from the options given below.
How many ions are produced from the complex $\mathrm{Co}\left(\mathrm{NH}_3\right)_6 \mathrm{Cl}_2$ in solution?
→${\left[ Fe ( CN )_{6}\right]^{4-}}$; ${\left[ Fe ( CN )_{6}\right]^{3-}}$; ${\left[ Ti ( CN )_{6}\right]^{3-}}$; ${\left[ Ni ( CN )_{4}\right]^{2-}}$; ${\left[ Co ( CN )_{6}\right]^{3-}}$
→Among the given complexes, number of paramagnetic complexes is .... .
The elements which exhibit both vertical and horizontal similarities are $......$
→The hydration of propyne results in formation of
An optically active compound $'X'$ having molecular formula $C_4H_8O_3$ it evolves $CO_2$ with $NaHCO_3$.$'x'$ on treatment with $LiAlH_4$ gives achiral compound then $'x'$ is
→The increasing order of the boiling points of the major products $A , B$ and $C$ of the following reactions will be :
→When $0.1\, mol\, MnO_4^{2-}$ is oxidised the quantity of electricity required to completely oxidise $MnO_4^{2-}$ to $MnO_4^-$ is ........ $C.$
→